[Event "?"]
[Site "?"]
[Date "1951.??.??"]
[Round "?"]
[White "Simulación de Turing"]
[Black "Humano"]
[Result "0-1"]
[ECO "C26"]
[Annotator "Egger,Jorge"]
[PlyCount "58"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 e5 2. Nc3 Nf6 3. d4 Bb4 4. Nf3 d6 5. Bd2 Nc6 6. d5 Nd4 7. h4 {Este movimi
ento se explica dados los parametros de la funcion de evaluacion.Esta asigna
un bonus por avanzar los peones, y entregar movilidad a las piezas. El
movimiento h4 obtiene un bono de 0.6 por el avance de 2 filas del peon h y por
incrementar la movilidad de la torre desde 2 (score 1.4) a 4 (score 2)} 7...
Bg4 8. a4 {Evidentemente!} 8... Nxf3+ 9. gxf3 Bh5 10. Bb5+ c6 $2 {
Obviamente Nd7 era mejor.} 11. dxc6 O-O 12. cxb7 Rb8 13. Ba6 Qa5 14. Qe2 Nd7 ({
El negro podia recuperar un peon con} 14... Bxf3 15. Qxf3 Qxa6) 15. Rg1 Nc5 {#}
16. Rg5 {Turing comentaba que el programa se enfrentaba a la perdida del peon
"b" e intenta evitar la perdida material tan lejos como sea posible, pero
luego de la retirada del alfil atacado el peon de "b7" caera de todas maneras.
Este movimiento es un ejemplo de lo que hoy se conoce como "Efecto Horizonte".}
16... Bg6 17. Bb5 $2 (17. Bc4 $1 Rxb7 $140 $2 18. h5 h6 $2 19. Rxg6) 17... Nxb7
18. O-O-O $2 (18. Bc4 {intentando jugar 19.h5 da clara ventaja al blanco. El
programa esta mas atraido por el bono entregado por el enroque.}) 18... Nc5 19.
Bc6 Rfc8 20. Bd5 Bxc3 21. Bxc3 Qxa4 22. Kd2 $2 (22. h5 $18) 22... Ne6 23. Rg4
$2 (23. Bxe6 {
Era lo correcto. Ahora el caballo negro puede transformarse en una pesadilla.})
23... Nd4 $2 (23... Nf4 $1 {seguido de la captura del alfil blanco.}) 24. Qd3
Nb5 25. Bb3 Qa6 26. Bc4 (26. Rdg1 $16) 26... Bh5 27. Rg3 (27. Rg5 $1) 27... Qa4
28. Bxb5 Qxb5 29. Qxd6 $4 ({Luego de} 29. Qxb5 Rxb5 30. Rdg1 g6 31. Ke3 {
el blanco podia reagrupar sus torres y aprovechar la ventaja de la pesima
posicion del alfil negro.}) 29... Rd8 {El blanco habia omitido la fuerza de
este "profundo" movimiento . El programa solo busco a una profundidad de 2
movimientos por lo que cuando considero 29.Qxd6 no fue capaz de ver la
posicion en la que su dama es capturada (que estaba a profundidad 4).} 0-1

[Event "?"]
[Site "?"]
[Date "1958.??.??"]
[Round "?"]
[White "Programa de Bernstein"]
[Black "Humano"]
[Result "0-1"]
[ECO "C23"]
[Annotator "Egger,Jorge"]
[PlyCount "44"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 e5 2. Bc4 b6 3. d3 Nf6 4. Bg5 Bb7 5. Bxf6 Qxf6 6. Nf3 c6 7. O-O d5 8.
exd5 cxd5 9. Bb5+ Nc6 10. c4 $2 ({El blanco ganaba un peon con} 10. Nxe5 $1 {
pero luego de 11...Qxe5 el programa con su profundidad de 2 movimientos solo
ve que el negro gana una pieza por un peon omitiendo la ganadora 12.Re1.})
10... dxc4 11. Bxc6+ Qxc6 12. dxc4 e4 13. Ng5 Qg6 14. Nh3 e3 15. f3 Bc5 16. Re1
O-O {#} 17. Nc3 $4 {Este movimiento muetra una deficiencia en las rutinas de
decision. No hay ninguna rutina quem realice las preguntas ?puedo dar jaque?
obien ?puedo atacar una pieza enemiga? con lo cual el siguiente movimiento del
negro no estaba en los considerados.} 17... e2+ 18. Nf2 Bxf3 19. g3 exd1=Q 20.
Ncxd1 Qc2 21. b3 Rad8 22. h4 Rxd1 0-1

[Event "Carnegie Mellon"]
[Site "?"]
[Date "1960.??.??"]
[Round "?"]
[White "NSS Program"]
[Black "Simon"]
[Result "*"]
[ECO "D00"]
[Annotator "Egger,Jorge"]
[PlyCount "58"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

{La siguiente partida fue jugada por Simon contra el programa NSS el cual
corria en un computador RAND JOHNIAC. Esta computadora operaba a la mitad de
la velocidad de la IBM 704 utilizada por Bernstein.} 1. d4 Nf6 2. Nc3 d5 3. Qd3
$6 b6 4. e4 Bb7 5. exd5 Nxd5 6. Nf3 e6 7. Be2 Be7 8. Be3 O-O 9. O-O Nd7 10.
Rfe1 c5 11. Rad1 Qc7 12. Nxd5 Bxd5 13. a4 (13. c4) 13... Rac8 14. Qc3 Bf6 15.
Bb5 (15. h3 Bxf3 16. Bxf3 e5) 15... Bxf3 16. gxf3 Rfd8 17. Bxd7 $2 Qxd7 18. b3
cxd4 19. Qd2 Qc6 20. Bf4 Qxc2 21. Qxc2 Rxc2 22. Rc1 Rdc8 23. Rcd1 R8c3 24. b4
Rxf3 25. Bg3 d3 26. Rc1 Bg5 27. Rxc2 dxc2 28. Be5 c1=Q 29. Rxc1 Bxc1 *

[Event "Stanford - Moscú"]
[Site "?"]
[Date "1966.??.??"]
[Round "?"]
[White "ITEP (3 movimientos)"]
[Black "Kotok/McCarthy"]
[Result "1/2-1/2"]
[ECO "C46"]
[Annotator "Egger,Jorge"]
[PlyCount "74"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

{El programa ITEP utilizaba una estrategia de Shannon tipo A . En dos de msus
partidas jugo con profundidad de 3 movimientos mintras que en los otros de 5.
El programa americano utilizaba una estrategia tipo B con profundidad de 4
movimientos. LAs notas de las partidas fueron tomadas de un articulo de
Arlazarov y Bitman aparecido en Shakhmaty v CCCP en 1968} 1. e4 e5 2. Nc3 Nc6
3. Nf3 Bc5 4. Bc4 (4. Nxe5 $1) 4... Nf6 5. O-O O-O 6. d3 d6 7. Be3 Bg4 8. h3
Bh5 9. Bd5 {La etapa del desarrollo ha concluido y el programa no sabe que
hacer. Aca lo mas razonable era continuar con Na4 seguido de c3.} 9... Bd4 {
Pareciera que el programa americano sufre los mismos inconvenientes.} 10. g4
Bxc3 11. bxc3 Bg6 12. Bg5 Re8 13. Rb1 Rb8 14. Qe2 ({En la variante} 14. Rxb7
Rxb7 15. Bxc6 {el programa ha sobrepasado los 3 movimientos por lo que no
valora el hecho de que recuperara el material y con un peon extra.}) 14... Kh8
15. d4 Kg8 16. Qc4 Na5 17. Bxf6 Qxf6 18. Qd3 c6 19. dxe5 dxe5 20. Bb3 Rbd8 21.
Qe3 b6 22. Rfd1 Rd6 23. g5 Qe7 24. Rd3 Rxd3 25. cxd3 Rd8 26. Ra1 Qd6 27. d4
exd4 28. cxd4 Nxb3 29. axb3 a5 30. Ra4 Qe6 31. Ne5 Qe8 32. f4 Rd6 33. f5 Bh5
34. Nc4 Rd8 35. Nxb6 Rb8 36. Nc4 Bd1 37. Ra3 Bc2 1/2-1/2

[Event "Stanford - Moscú"]
[Site "?"]
[Date "1966.??.??"]
[Round "?"]
[White "Kotok/McCarthy"]
[Black "ITEP (3 movimientos)"]
[Result "1/2-1/2"]
[ECO "B02"]
[PlyCount "79"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 Nf6 2. e5 Nd5 3. Nf3 e6 4. Bb5 a6 5. Ba4 b5 6. Bb3 Bb4 {Esto es un
caso de error posicional debido a una profundidad de calculo insuficiente. El
negro desarrolla una pieza y previene el movimiento 7.d4 del blanco sin notar
que luego de 7.c3 Bc5 (tres movimientos!) el blanco puede jugar 8.d4} 7. Nc3
Nf4 8. O-O Bb7 9. d4 Bxc3 10. bxc3 Nd5 11. Bxd5 Bxd5 12. Ba3 d6 13. exd6 cxd6
14. Re1 Nc6 15. Re3 O-O 16. Qe2 Bc4 17. Qe1 Qc7 18. Bb4 a5 19. Ba3 Kh8 {
Un extrano movimiento que se justifica en el hecho de que el negro intenta
jugar 20...f5, la cual directamente fallaria por la continuacion 20.Rxe6  y si
Bxe6 21.Qxe6+ Kh8 22.Bxd6.} 20. Ng5 h6 21. Ne4 Rfd8 22. Nxd6 Rxd6 23. Bxd6 Qxd6
24. a3 Ne7 25. Re5 Nc6 26. Rc5 e5 27. Qe4 Ra6 {Solo ahora el programa noto que
si 27... Rc8 28.a4 favorece ampliamente al blanco.} 28. Rd1 g6 29. Rd2 g5 {
Evitando la perdida de un peon luego de 30.Qe3} 30. Rd1 a4 31. Rd2 f6 {
Carentes de plan las negras realizan un debil movimiento considerando que
frente a 32.Qg6 Qf8 seria suficiente. Un jugador humano no hubiese terminado
el analisis en una posicion como esta, excepto si la considerase aceptable.}
32. Qe3 exd4 33. cxd4 Ne7 34. Qg3 Qxg3 35. hxg3 Nd5 36. Rc8+ Kh7 37. Rf8 b4 38.
axb4 Nxb4 39. c3 Nd5 40. Rc8 {Desde el punto de vista de un buen jugador de
ajedrez esta posicion estaganada para las negras, pero ambos programas
mostraban una total carencia de entendimiento del plan a seguir por lo que no
habia mayor sentido en continuar la partida.} 1/2-1/2

[Event "Stanford - Moscú"]
[Site "?"]
[Date "1966.??.??"]
[Round "?"]
[White "ITEP (5 movimientos)"]
[Black "Kotok/McCarthy"]
[Result "1-0"]
[ECO "C46"]
[Annotator "Egger,Jorge"]
[PlyCount "37"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Bc5 4. Nxe5 $1 {Este movimiento resulto ser una
grata sorpresa, dado que el programa asigna un gran valor al derecho a enrocar.
de todas maneras, las ventajas posicionales de este ``seudo sacrificio''
llevaron al programa a convencerse de realizarlo.} 4... Nxe5 5. d4 Bd6 6. dxe5
Bxe5 7. f4 {
Con este movimiento el blanco previo la continuacion 7...Bxc3 8.bxc3 Nf6 9.Qd4}
7... Bxc3+ 8. bxc3 Nf6 9. e5 {Asi como en las partidas entre humanos los
planes peuden cambiar a medida que el juego avanza. En principio el programa
planeaba jugar 9.Qd4 pero ahora visualiza nuevas posibilidades.} 9... Ne4 10.
Qd3 {Dada la prifundidad limitada de 5 movimientos el programa no visualiza la
continuacion 10.Qd5! pues luego de 10... Nxc3 11.Qc4 Qh4+ 12.g3 no ve una
ganancia  directa de material a pesar de que el negro tiene 2 piezas bajo
ataque!} 10... Nc5 11. Qd5 Ne6 12. f5 Ng5 $2 {
Un extrano error. 12... c6 salvaba aun al caballo negro.} 13. h4 f6 14. hxg5
fxg5 {#} 15. Rxh7 $1 {Este simple golpe tactico habria sido encontrado incluso
con una profundidad de 3 movimientos.} 15... Rf8 16. Rxg7 c6 17. Qd6 {
Luego de realizar este movimiento el programa ``anuncio'' que la unica
salvacion del negro del mate era 17...Qf6} 17... Rxf5 18. Rg8+ Rf8 19. Qxf8#
1-0

[Event "Stanford - Moscú"]
[Site "?"]
[Date "1966.??.??"]
[Round "?"]
[White "Kotok/McCarthy"]
[Black "ITEP (5 movimientos)"]
[Result "0-1"]
[ECO "B02"]
[Annotator "Egger,Jorge"]
[PlyCount "82"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 Nf6 2. e5 Nd5 3. Nf3 Nb4 {Esto no tiene sentido.El programa intenta
jugar d5 y la interpolacion de 4.c3 Nc6 no mejora (en opinion de las negras)
la posicion de las blancas.} 4. Bb5 c6 5. Ba4 d6 6. d4 Qa5 7. c4 {
Un grave error que el programa no esperaba luego de jugar Qa5.} 7... Nc2+ 8.
Kf1 Nxa1 9. Nc3 Qb4 {El programa ve que en variantes tranquilas el blanco gana
el Na1 y ahora intenta mantener la torre extra.} 10. Qe2 dxe5 11. dxe5 Be6 12.
Qd1 Bxc4+ 13. Ne2 b5 14. Bc2 Nxc2 15. Qxc2 Bxa2 16. Ned4 Qc4+ 17. Kg1 c5 18.
Qd2 cxd4 19. Nxd4 e6 20. Nf3 Nc6 21. Qg5 Rd8 22. Bd2 Qc1+ {
El programa no busca belleza, simplemente esta ganando un peon.} 23. Be1 Qxb2
24. Qf4 Bd5 25. Qg3 Qe2 26. Bc3 b4 27. Be1 Bxf3 28. gxf3 Qxe1+ 29. Kg2 Qxe5 30.
Qh4 a5 31. Rc1 Nd4 32. Rf1 Nxf3 $1 {El programa no habia visto esta movida en
sus analisis previos. Ahora si 33.Kxf3 Rd4 gana la dama.} 33. Qh3 Rd3 34. Qg3
Ne1+ 35. Rxe1 Rxg3+ 36. Kf1 Qb5+ 37. Re2 Ra3 38. Ke1 Ra1+ 39. Kd2 Qd5+ 40. Ke3
Ra3+ 41. Kf4 Qf5# 0-1

[Event "Stanford - Moscú"]
[Site "?"]
[Date "1968.??.??"]
[Round "?"]
[White "Lectores del "Ural Worker""]
[Black "Programa Soviético"]
[Result "1-0"]
[ECO "B00"]
[Annotator "Egger,Jorge"]
[PlyCount "37"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 Nc6 {Una jugada no muy popular, pero la computadora tiene su propio
gusto de aperturas.} 2. d4 d5 3. Nc3 dxe4 {
Otra posibilidad mas tranquila es 3...e6} 4. d5 Ne5 5. Bf4 {El blanco no tiene
apuro en recuperar el peon pues atacando el caballo central evita el
desarrollo del negro.} 5... Ng6 6. Bg3 f5 $2 {Pareciese que la computadora
tiene las mismas debilidades que los humanos. La jugada intenta defender el
peon extra y a la ves intenta 7...f4 pero en realidad debilita a su propio rey
y retrasa el desarrollo, conceptos fundamentales de la apertura!.} 7. Bb5+ Bd7
8. Nh3 $1 {Los lectores han encontrado el punto debil de las negras por lo que
el caballo se dirige a e6.} 8... c6 $1 {La computadora mantiene a su alfil de
casillas blancas con tal de controlar el punto e6.} 9. Bc4 Qb6 {El plan blanco
de Ng5 seguido de dxc6 y Bf7 mate es captado por la computadora quien busca
refugio para su rey tratando de enrocar largo.} 10. Qd2 Qc5 {
La computadora esta alerta. Si 10... 0-0-0 entonces 11.Na4 gana la dama.} 11.
dxc6 Bxc6 12. Be6 $1 {Bien jugado. Ahora el flanco de rey negro esta congelado
y las blancas pueden preparar el ataque decisivo.} 12... Nh6 13. O-O-O Ne5 14.
Ng5 {Con idea de Bxe5 y Bf7+.} 14... Nhg4 15. f3 g6 {
Las negras deben entregar su caballo con lo cual la partida esta decidida.} 16.
fxg4 Bg7 17. Bxe5 Qxe5 18. Qd8+ $1 Rxd8 19. Bf7+ 1-0

[Event "Stanford - Moscú"]
[Site "?"]
[Date "1972.??.??"]
[Round "?"]
[White "KAISSA"]
[Black "Komsomolskaya Pravda, Lectores"]
[Result "1/2-1/2"]
[ECO "B51"]
[PlyCount "70"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 c5 2. Nc3 {El programa jugaba sin libro de aperturas. este movimiento le
tomo cerca de 40 minutos.} 2... Nc6 3. Nf3 d6 4. Bb5 Bd7 5. O-O g6 6. d4 cxd4
7. Bxc6 dxc3 8. Bxb7 Rb8 9. Bd5 Bg7 (9... cxb2 10. Bxb2 Rxb2 11. Qd4) 10. b3
Nf6 11. Be3 Qc7 12. Qd4 a5 13. Bc4 O-O 14. Rae1 Bc6 15. e5 Bxf3 16. exd6 exd6
17. gxf3 Nh5 18. Qd3 Be5 19. Bd4 Kg7 20. Re3 f6 21. Rfe1 Nf4 22. Qxc3 Rbc8 23.
a4 Qd7 24. Bxe5 fxe5 25. Kh1 Qh3 26. Rg1 Nd5 27. Qxa5 Rc5 28. Qa7+ Rc7 29. Qa5
Rc5 30. Qa7+ Rf7 31. Qxc5 dxc5 32. Bxd5 Rf4 33. Rxe5 Rxf3 34. Bxf3 Qxf3+ 35.
Rg2 Qd1+ 1/2-1/2

[Event "Stanford - Moscú"]
[Site "?"]
[Date "1972.??.??"]
[Round "?"]
[White "Komsomolskaya Pravda, Lectores"]
[Black "KAISSA"]
[Result "1-0"]
[ECO "A01"]
[PlyCount "67"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. b3 e5 2. Bb2 Nc6 3. c4 f6 4. Nc3 Bb4 5. Nd5 Nge7 6. a3 Bd6 7. g3 O-O 8. Bg2
Ng6 9. e3 f5 10. Ne2 Re8 11. Qc2 e4 12. d3 exd3 13. Qxd3 Rf8 14. f4 Be7 15. h4
h6 16. h5 Nh8 17. e4 d6 18. O-O-O Rf7 19. Nxe7+ Qxe7 20. Nc3 Be6 21. Nd5 Qd7
22. Ne3 fxe4 23. Bxe4 Ne7 24. Bxb7 Rb8 25. Be4 Nf5 26. Nd5 a5 27. g4 Ne7 28.
Nxe7+ Rxe7 29. g5 hxg5 30. f5 Nf7 31. fxe6 Qxe6 32. Bd5 Qe3+ 33. Qxe3 Rxe3 34.
Rdf1 1-0

[Event "Campeonato Alemán de Computadoras"]
[Site "?"]
[Date "1975.??.??"]
[Round "?"]
[White "Fischer, Robert"]
[Black "Programa Schneider"]
[Result "1-0"]
[ECO "D00"]
[PlyCount "47"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. Nc3 d5 2. d4 Bg4 3. f3 Bf5 4. e4 dxe4 5. fxe4 Bd7 6. Nf3 Nc6 7. e5 e6 8. Bg5
Be7 9. Qd2 g6 10. Bd3 b6 11. Bxe7 Ngxe7 12. O-O-O O-O $4 13. Qh6 {
Iniciando el asalto sobre el rey enemigo.} 13... Nf5 14. Bxf5 gxf5 15. Ng5 {
Las blancas ya tienen posicion ganadora.} 15... Qxg5+ 16. Qxg5+ Kh8 17. g4 fxg4
18. Qxg4 f5 19. Qh4 f4 20. Ne4 f3 21. Ng5 Rf7 22. Nxf7+ Kg8 23. Qf6 f2 24. Nh6#
1-0

[Event "Toronto (m/1)"]
[Site "?"]
[Date "1978.??.??"]
[Round "?"]
[White "Levy, David"]
[Black "CHESS 4.7"]
[Result "1/2-1/2"]
[ECO "A07"]
[Annotator "Egger,Jorge"]
[PlyCount "127"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. g3 d5 2. Bg2 e5 3. d3 Nf6 4. Nf3 Nc6 5. O-O Bd7 6. b3 Bc5 7. Bb2 Qe7 8. a3
e4 9. Ne1 O-O 10. d4 Bd6 11. e3 Ng4 12. h3 {#} 12... Nxe3 13. fxe3 Qg5 14. g4
Qxe3+ 15. Rf2 Bg3 16. Qe2 Qxf2+ 17. Qxf2 Bxf2+ 18. Kxf2 f5 19. gxf5 Ne7 20. c4
Rxf5+ 21. Kg1 c6 22. Nc3 Rh5 23. Kh2 Rf8 24. Nd1 Ng6 25. Rc1 Bxh3 26. Bxh3 Rf1
27. Ng2 Rf3 28. cxd5 Rhxh3+ 29. Kg1 cxd5 30. Rc8+ Nf8 31. Bc3 Rd3 32. Nde3
Rhxe3 33. Nxe3 Rxe3 34. Bb4 Rf3 35. Rd8 h6 36. Rxd5 Rxb3 37. Rd8 Rf3 38. Ra8 g5
39. d5 h5 40. d6 Kg7 41. Rxa7 Rf7 42. Ra5 Kf6 43. Bc3+ Kg6 44. Re5 Rf3 45. Bb4
Rf4 46. Re7 Rf7 47. Rxe4 Rd7 48. Re7 h4 49. Kg2 g4 50. Kh2 b6 51. Kg2 Rd8 52.
a4 Nd7 53. a5 Nf6 54. axb6 Nd5 55. b7 Nxe7 (55... Nxb4 56. Re4 Nc6 57. Rxg4+
Kh5 58. Rc4) (55... Nf4+ 56. Kh1) 56. dxe7 Rh8 57. Bd6 Kf6 58. b8=Q Rxb8 59.
Bxb8 Kxe7 60. Bf4 Kf6 61. Bd2 Kg6 62. Be1 Kg5 63. Bf2 Kh5 64. Be1 1/2-1/2

[Event "Toronto (m/2)"]
[Site "?"]
[Date "1978.??.??"]
[Round "?"]
[White "CHESS 4.7"]
[Black "Levy, David"]
[Result "0-1"]
[ECO "B23"]
[PlyCount "74"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. Nc3 c5 2. e4 Nc6 3. f4 a6 {
Dejando al programa fuera de su libro de aperturas.} 4. Nf3 g6 5. d4 cxd4 6.
Nxd4 Bg7 7. Be3 d6 8. Nxc6 $2 {Un error estrategico que solo refuerza el
centro negro y le entrega juego a traves de la columna b. El programa lo
realiza en virtud del peon aislado a, pero la verdad es que este detalle es de
minima importancia.} 8... bxc6 9. Be2 Rb8 10. Qc1 Qa5 11. Bd2 Qb6 12. Na4 Qa7
13. Nc3 Bd4 14. Nd1 Nf6 15. c3 Bb6 16. Qc2 Ng4 17. Qa4 O-O 18. Bxg4 Bxg4 19.
Qxc6 Bxd1 20. Kxd1 Be3 $1 21. b3 Bxd2 22. Kxd2 Rbc8 23. Qa4 Qf2+ {
Se ha producido la invasion de las negras.} 24. Kd3 Qxg2 25. Qd4 Qf3+ 26. Kc2
Qe2+ 27. Kc1 e5 28. fxe5 dxe5 29. Qxe5 Rfe8 30. Qg3 Rxe4 31. Qh3 Rd8 32. Qf1
Qd2+ 33. Kb1 Re2 34. Qxe2 Qxe2 35. Re1 {Retrasa el mate en 1 movimiento!} 35...
Qxe1+ 36. Kb2 Rd2+ 37. Ka3 Qxa1 0-1

[Event "Toronto (m/3)"]
[Site "?"]
[Date "1978.??.??"]
[Round "?"]
[White "Levy, David"]
[Black "CHESS 4.7"]
[Result "1-0"]
[ECO "A15"]
[PlyCount "83"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. c4 Nf6 2. a3 {Fuera del libro de aperturas nuevamente!} 2... Nc6 3. Nc3 d5
4. cxd5 Nxd5 5. d3 Nxc3 {Un error identico al producidoen la partida anterior.}
6. bxc3 e5 7. g3 Be7 8. Bg2 Qd6 9. Nf3 Be6 10. O-O O-O 11. Qa4 Qc5 12. Bd2 b5
$2 {Debilita el flanco de dama sin mayor provocacion.} 13. Qc2 f6 14. Rfb1 Rad8
15. Qb2 (15. Be3 Nd4 $1 16. Qb2 Qxc3 17. Qxc3 Nxe2+) 15... Rb8 16. Be3 Qd6 17.
Nd2 {Intentando Nb3 o Ne4 entrando luego en c5.} 17... Bd5 18. Bxd5+ Qxd5 19.
Qb3 {Los programas tienen mayor facilidad de calculo en los finales que en el
medio juego, esto por la menor cantidad de piezas, por lo que este cambio de
damas lo realizo solo debido a que evalue las debilidades del negro como
decisivas en el final.} 19... Qxb3 20. Nxb3 f5 21. Bc5 Bd6 $1 22. Rb2 Kh8 {
Cuando no hay movimientos claros los programas gustan de estas jugadas de
resguardo, pero en el final no tiene ningun sentido el alejar al rey del
centro!.} 23. Rab1 a6 24. Bxd6 cxd6 25. Nd2 f4 26. Kg2 fxg3 27. hxg3 Rbd8 28.
a4 $1 Na7 $1 (28... bxa4 29. Rb6) 29. Ne4 bxa4 30. Rb6 d5 31. Nc5 Nb5 32. Nxa4
Ra8 33. c4 {Un peon pasado que otorga ventaja a las blancas.} 33... dxc4 34.
dxc4 Nd4 35. e3 Nf3 36. c5 Ng5 37. c6 Ne4 38. c7 Rxf2+ 39. Kg1 Rff8 40. Rb8 h5
41. Rxa8 Rxa8 42. Rb8+ 1-0

[Event "Toronto (m/5)"]
[Site "?"]
[Date "1978.??.??"]
[Round "?"]
[White "Levy, David"]
[Black "CHESS 4.7"]
[Result "1-0"]
[ECO "A15"]
[PlyCount "83"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. c4 Nf6 2. a3 c6 {Slate agrego este movimiento como respuesta a la jugada 2.
a3, tambien ocurrida en la partida 3.} 3. d3 d5 4. Qc2 dxc4 5. Qxc4 e5 {
la estructura de peones es la de la defensa siciliana!} 6. Nf3 Bd6 7. g3 Be6 8.
Qc2 Nbd7 9. Bg2 O-O 10. O-O Qb6 11. Nbd2 Qc5 12. Qb1 {Deseaba mantener las
Damas el mayor tiempo posible con tal de limitar la capacidad de busqueda del
programa.} 12... h6 13. b4 Qb5 14. Qc2 Nb6 15. Bb2 a5 16. a4 Qa6 17. bxa5 Qxa5
{El juego se ha tornado algo complejo, pero con la dama negra fuera de juego
me sentia con confianza.} 18. Bc3 Qc5 19. Rfc1 Nbd7 20. a5 Qa7 21. Qb2 Ng4 22.
Ne4 Bc7 23. h3 f5 24. hxg4 fxe4 25. dxe4 Bxg4 26. Be1 {
Sobreproteccion innecesaria. La inmediata Rcb1 era mejor.} 26... Nc5 27. Rcb1 {
En este momento la maquina tuvo problemas de funcionamiento. Al momento de
reponerse le restaban 13 minutos para los 20 movimientos antes del control.
Aun asi el programa realizo las mejores jugadas defensivas.} 27... Rae8 28. Bd2
Rf7 29. Be3 Bd6 30. Qc2 Bxf3 31. Bxf3 Ra8 32. Rc1 b6 33. Kg2 (33. axb6 Qxa1 34.
Rxa1 Rxa1+ 35. Kg2 Ra5 {y no es claro que el blanco gane inmediatamente.})
33... Qb7 34. axb6 Rxa1 35. Rxa1 Ne6 36. Ra7 Qc8 37. Qa2 Rf6 38. Ra8 Bb8 39.
Bg4 Kf7 40. Qa7+ Bxa7 41. Rxc8 Bxb6 42. Bxb6 {Una vez mas la maquina fue
derrotada y David Slate decidio abandonar la partida y el match.} 1-0

[Event "ACM NACC Washington"]
[Site "?"]
[Date "1978.??.??"]
[Round "?"]
[White "BELLE"]
[Black "CHESS 4.7"]
[Result "1-0"]
[ECO "C10"]
[Annotator "Egger,Jorge"]
[PlyCount "95"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 Nc6 2. d4 d5 3. Nc3 e6 4. Nf3 Bb4 5. e5 Nge7 6. Bd2 Nf5 7. Ne2 Be7 8. c3
O-O 9. Nf4 f6 10. Bd3 fxe5 11. dxe5 g5 12. g4 Ng7 13. Ng2 b6 (13... Rxf3 14.
Qxf3 Nxe5 15. Qe2 Nxd3+ 16. Qxd3 e5) 14. Qe2 Bb7 15. Rg1 (15. h4 Rxf3 16. Qxf3
Nxe5 17. Qe2 (17. Bxh7+ Kxh7 18. hxg5+ Kg8 19. Qh3) 17... Nxd3+ 18. Qxd3 gxh4)
15... a5 16. a4 Kh8 17. h3 Kg8 18. Rh1 h6 19. h4 d4 20. hxg5 {#} (20. Qe4 Rxf3
21. Qh7+ Kf8 22. Bg6 Bf6 23. exf6 (23. Qh8+ Ke7 24. exf6+ Kxf6 25. Qxh6) 23...
Qxf6 24. hxg5 hxg5 25. Be4 Rxf2 26. Bxg5) 20... Nb4 21. gxh6 $4 (21. cxb4 Bxf3
(21... Rxf3 22. gxh6) 22. Bh7+ Kh8 (22... Kxh7 23. Qd3+ Kg8 24. Rxh6 Bxg2 (
24... Qd5 25. Qh7+ Kf7 26. Qg6+ Kg8 27. Rh8+ Kxh8 28. Qh6+ Kg8 29. g6 Qe4+ 30.
Ne3 Qxg6 31. Qxg6 dxe3 32. Bxe3 Bxb4+) 25. Qh7+ Kf7 26. Qg6+ Kg8 27. Rh8+ Kxh8
28. Qh6+ Kg8 29. g6) 23. Rxh6 Bxe2 24. Bb1+ Kg8 25. Bh7+ Kf7 26. Bg6+ $11) (21.
Rxh6 Rxf3 22. cxb4 Bxg5 23. Bh7+ Kf7 24. Bxg5 Qxg5 25. Be4) 21... Nxd3+ $4 (
21... dxc3 22. Bh7+ Kxh7 23. hxg7+ Kxg7 24. Bh6+ Kg8 25. Rd1 (25. Bxf8 Qxf8)
25... Bxf3 26. Rxd8 Raxd8 27. Bxf8 Bxe2) 22. Qxd3 dxc3 (22... Rxf3 23. h7+ Kf7
24. Qxd4) 23. Qg6 cxd2+ 24. Nxd2 Rf7 25. hxg7 Rxg7 26. Qxe6+ Rf7 27. Qh6 Rg7
28. Qh8+ Kf7 29. e6+ Kxe6 30. Qxg7 Bxg2 31. Rh6+ Kd7 32. O-O-O Bd5 33. Ne4 Kc8
34. Rh8 Bxe4 35. Rdxd8+ Bxd8 36. Qe7 Kb7 37. Qxe4+ Ka7 38. Rg8 Rb8 39. g5 Be7
40. Rxb8 Bxg5+ 41. f4 Bxf4+ 42. Qxf4 Kxb8 43. Kd2 Kb7 44. Kd3 Kc8 45. b4 axb4
46. Qxb4 Kd7 47. Qb5+ Kd8 48. Ke4 1-0

[Event "MIT"]
[Site "?"]
[Date "1978.08.23"]
[Round "?"]
[White "MACHACK/CHEOPS"]
[Black "Levy, David"]
[Result "0-1"]
[ECO "B71"]
[PlyCount "86"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 c5 {Dado que no sabia nada acerca del estilo de juego del programa
preferi seguri caminos trillados para mi en vez de confundir inmediatamente el
juego.} 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 {
La variante del dragon de la siciliana, una de mis lineas favoritas.} 6. f4 Bg7
7. e5 Nh5 8. Bb5+ (8. g4 $2 Nxf4 9. Bxf4 dxe5) 8... Bd7 9. e6 fxe6 10. Nxe6
Bxc3+ 11. bxc3 {Hasta aca ambos bandos siguen una linea teorica considerada
como buena para las blancas.} 11... Qc8 $1 {Una nueva idea en el momento de
jugarse esta partida. Mantiene amenazas contra c3, e6 y b5.} 12. Qd4 Nf6 13.
Qc4 Nc6 14. Nd4 Nxd4 {
Derivando la partida a un final ligeramente favorable a las negras.} 15. cxd4
Qxc4 16. Bxc4 Bf5 $1 17. Bb5+ Kf7 18. Bc4+ d5 19. Bd3 $1 {El programa evalua
correctamente que la posicion con peones doblados ofrece mejor resistencia que
la que se obtendria conla retirada Bb3, despues de lo cual el peon c caeria
sin apelacion.} 19... Rhc8 20. O-O {Un error conceptual. El rey es necesario
en el centro para proteger las casillas c3 y d3.} 20... Rc7 21. Rb1 Rac8 22.
Be3 $6 Ne4 23. Rf3 Nd6 24. Rb2 b6 25. a4 Bxd3 {Ahora que las piezas negras
estan en su mejor ubicacion es hora de aprovechar las ventajas estructurales
de este cambio.} 26. cxd3 Rc3 27. Rh3 h5 28. Bd2 Rc2 29. Rxc2 Rxc2 30. Be1 Nf5
31. a5 bxa5 32. Bxa5 Nxd4 33. Re3 Ra2 34. Bc7 a5 {
Este peon pasado decide la partida.} 35. Re1 a4 36. Be5 Nc6 37. Bh8 a3 38. Rd1
Rc2 39. Ba1 a2 40. h3 Na5 41. d4 Nb3 42. f5 Rc1 43. Rxc1 Nxc1 0-1

[Event "ACM NACC Washington"]
[Site "?"]
[Date "1978.10.??"]
[Round "?"]
[White "BLITZ 6.5"]
[Black "BELLE"]
[Result "0-1"]
[ECO "C48"]
[Annotator "Egger,Jorge"]
[PlyCount "28"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Bc4 Bc5 6. Nxe5 Qe7 7. Bxf7+ Kf8
8. Ng6+ hxg6 9. Bc4 Nxe4 10. O-O {#} 10... Rxh2 $3 11. Kxh2 Qh4+ 12. Kg1 Ng3
13. Qh5 gxh5 14. fxg3+ Nf3# 0-1

[Event "Toronto (m/4)"]
[Site "?"]
[Date "1979.??.??"]
[Round "?"]
[White "CHESS 4.7"]
[Black "Levy, David"]
[Result "1-0"]
[ECO "C40"]
[Annotator "Egger,Jorge"]
[PlyCount "110"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 e5 2. Nf3 f5 3. exf5 e4 4. Ne5 Nf6 5. Ng4 d5 6. Nxf6+ Qxf6 7. Qh5+ {
El programa con un peon extra esta deseoso de cambiar damas.} 7... Qf7 8. Qxf7+
Kxf7 9. Nc3 c6 10. d3 exd3 11. Bxd3 Nd7 12. Bf4 Nc5 13. g4 Nxd3+ 14. cxd3 Bc5 {
Previniendo el enrique largo y proviocando el corto. Los programas gustan de
enrocar una vez que han desarrollado sus piezas.} 15. O-O h5 16. Na4 Bd4 17.
Be3 Be5 18. d4 Bd6 19. h3 b6 20. Rfe1 Bd7 21. Nc3 hxg4 22. hxg4 Rh4 23. f3 Rah8
24. Kf1 Bg3 $2 {La inmediata 24...Bc8 era mejor y si 25.Ke2 Th2+ 26.Kd1 Rxb2
con una gran posicion.} 25. Re2 Bc8 26. Kg2 Bd6 27. Bg1 Rh3 28. Rae1 Rg3+ 29.
Kf2 Rhh3 30. Re3 Ba6 (30... Bf4 31. Re7+ Kf6 32. R1e3 $1 {Seguido de Ne2. Si
hubiese visto este recurso defensivo no habria cometido el error  de la jugada
24.}) 31. Ne2 Bxe2 32. R1xe2 c5 33. f4 $1 {Esta jugada escapo a mis analisis.}
33... Rxe3 34. Rxe3 Rh4 (34... Rxe3 35. Kxe3 cxd4+ 36. Kd3 $1 {
con un final ganador para las blancas.}) 35. Kg3 Rh1 36. Bf2 Rd1 $1 37. Ra3
cxd4 38. Rxa7+ Kf8 $4 (38... Ke8 39. Rxg7 d3 40. Kf3 Rb1 {
era suficiente para ganar.}) 39. Rd7 Rd3+ $4 {
Un idea que falla debido a la jugada 48 del blanco. Correcto era 39...Bc5.} 40.
Kg2 Bc5 41. Rxd5 Rd2 42. b4 Bxb4 43. Rd8+ Kf7 44. Rd7+ Kf8 45. Rxd4 Rb2 46. Kf3
Bc5 47. Rd8+ Ke7 $4 {
El error final. Ahora las blancas toamn el control de todo.} 48. Bh4+ Kf7 49.
g5 g6 50. Rd7+ Kf8 51. fxg6 Rxa2 52. f5 Ra3+ 53. Kg4 Ra4+ 54. Kh5 Rd4 55. Rc7
Be7 1-0

[Event "3rd WCCC Linz"]
[Site "?"]
[Date "1980.??.??"]
[Round "?"]
[White "CHAOS"]
[Black "NUCHESS"]
[Result "1-0"]
[ECO "D29"]
[Annotator "Egger,Jorge"]
[PlyCount "88"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. Qe2 a6 7. O-O b5 8. Bb3
Bb7 9. Rd1 Nbd7 10. Nc3 Bd6 11. e4 cxd4 12. Nxd4 Qb8 13. g3 b4 14. Na4 Bxe4 15.
f3 Bb7 $2 {#} (15... e5 $1 16. Ne6 fxe6 17. fxe4 Bc5+ 18. Nxc5 Nxc5 19. Qc4 Qb5
$17) 16. Nxe6 $3 {Sacrificio material por compensacion posicional.. Esta fue
la primera ocasion en que se vio un sacrificio de parte del programa.} 16...
fxe6 17. Qxe6+ Kd8 (17... Be7 18. Re1 Qd8 19. Bf4 Kf8 20. Rad1 $16 {
CHAOS-CHESS 4.0, Estocolmo WCCC 1974}) 18. Rxd6 Qc7 19. Be3 Re8 20. Bb6 Rxe6
21. Bxe6 Bxf3 22. Rc1 Ra7 23. Rxc7 Rxc7 24. Bxc7+ Kxc7 25. Rxa6 Bc6 26. Ra7+
Kb8 27. Ra5 Kc7 28. b3 Kd6 29. Bxd7 Bxd7 30. Nb6 Kc6 31. Nxd7 Nxd7 32. Kf2 Nc5
33. Ke3 Kb6 34. Ra8 Ne6 35. Ke4 Kc5 36. Ra5+ Kb6 37. Re5 Nc5+ 38. Kd4 Nb7 39.
Re7 Nd6 40. Ke5 Nb5 41. Rxg7 h5 42. Rf7 Nc3 43. Rf2 Kc5 44. Rd2 Nb5 1-0

[Event "19 th NACCC, Orlando"]
[Site "?"]
[Date "1988.??.??"]
[Round "?"]
[White "DEEP THOUGTH"]
[Black "HITECH"]
[Result "1-0"]
[ECO "B04"]
[Annotator "Egger,Jorge"]
[PlyCount "113"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. e4 Nf6 {El creador de HITECH, Hans Berliner, utilizaba la Defensa Alekhine
en todas sus partidas.} 2. e5 Nd5 3. d4 d6 4. Nf3 Nc6 5. c4 Nb6 6. e6 {
El blanco sacrifica mun peon para entorpecer el desarrollo del negro.} 6...
fxe6 7. Ng5 g6 8. Bd3 Nxd4 9. Nxh7 Nf5 10. Nxf8 Kxf8 11. O-O c5 12. b3 d5 13.
Nd2 Qd6 14. Nf3 Nd7 15. Re1 d4 16. Ne5 $1 Nxe5 17. Bf4 Rh7 ({
La ultima aletrnativa del negro era} 17... Nxd3 18. Bxd6 Nxe1 19. Be5 Rh4 20.
Qxe1 b6) 18. Rxe5 {Con idea de Rxf5.} 18... Qb6 19. g4 Nh4 20. Bg3 Bd7 {#} 21.
Rh5 $3 gxh5 22. Bxh7 e5 23. Bxh4 Bxg4 24. Qd3 Rc8 25. Re1 Qe6 26. f3 Bh3 27.
Qg6 Qxg6+ 28. Bxg6 Rc6 29. Bxh5 Re6 30. Bg3 Ra6 31. a4 d3 32. Rxe5 Rd6 33. Re1
Rb6 34. Bf4 a5 35. Be3 Rxb3 36. Bxc5 d2 37. Bxe7+ Kg7 38. Rd1 Re3 39. Bh4 Ra3
40. Be8 Rxf3 41. Bg5 (41. Rxd2 $4 Rf1#) 41... Rf8 42. Bb5 Kg6 43. Be3 Rf3 44.
Bxd2 Rd3 45. c5 Rd5 46. c6 bxc6 47. Bxc6 Rd6 48. Bf3 Rd4 49. Bxa5 Rxa4 50. Rd6+
Kf5 51. Bc3 Ra2 52. Rh6 Bg4 53. Bd5 Rc2 54. Rc6 Re2 55. h4 Kf4 56. Rc4+ Kg3 57.
Ba5 1-0

[Event "Long Beach"]
[Site "?"]
[Date "1989.??.??"]
[Round "?"]
[White "Larsen, Bent"]
[Black "DEEP THOUGTH"]
[Result "0-1"]
[ECO "A20"]
[PlyCount "86"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. c4 e5 2. g3 Nf6 3. Bg2 c6 4. Nf3 e4 5. Nd4 d5 6. cxd5 Qxd5 7. Nc2 Qh5 8. h4
Bf5 9. Ne3 Bc5 10. Qb3 b6 11. Qa4 O-O 12. Nc3 b5 13. Qc2 Bxe3 14. dxe3 Re8 15.
a4 b4 16. Nb1 Nbd7 17. Nd2 Re6 18. b3 Rd8 19. Bb2 Bg6 20. Nc4 Nd5 21. O-O-O
N7f6 22. Bh3 Bf5 23. Bxf5 Qxf5 24. f3 h5 25. Bd4 Rd7 26. Kb2 Rc7 27. g4 hxg4
28. Rhg1 c5 29. fxg4 Nxg4 30. Bxg7 Rg6 31. Qd2 Rd7 32. Rxg4 Rxg4 33. Ne5 Nxe3
34. Qxd7 Nxd1+ 35. Qxd1 Rg3 36. Qd6 Kxg7 37. Nd7 Re3 38. Qh2 Kh7 39. Nf8+ Kh8
40. h5 Qd5 41. Ng6+ fxg6 42. hxg6+ Kg7 43. Qh7+ Kf6 0-1

[Event "Long Beach"]
[Site "?"]
[Date "1989.??.??"]
[Round "?"]
[White "Miles, Antony"]
[Black "DEEP THOUGTH"]
[Result "0-1"]
[ECO "D20"]
[Annotator "Egger,Jorge"]
[PlyCount "78"]
[EventDate "2003.06.15"]
[SourceDate "2003.06.15"]

1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. Nc3 e5 5. Nf3 exd4 6. Qxd4 Bd6 7. Bxc4 O-O 8.
Bg5 Nc6 9. Qd2 h6 10. Bh4 Bg4 11. O-O-O Bxf3 12. gxf3 {#} 12... Nxe4 $1 13.
Bxd8 Nxd2 14. Bxc7 Bxh2 $3 {Probablemente Miles omitio esta jugaday considero
solo la posibilidad de 14... Bxc7 15.Rxd2 y 14...Nxd2 15.Bxd6} 15. Bxh2 Nxc4
16. Rd7 b6 17. f4 Rad8 18. Rhd1 Rfe8 19. b3 Rxd7 20. Rxd7 Re1+ 21. Nd1 N4a5 22.
Kd2 {#} 22... Rh1 23. Bg3 h5 24. f5 h4 25. Bf4 Nb4 26. a3 Nbc6 27. Rd3 Nd4 $1
28. b4 Nac6 29. f6 gxf6 30. Nc3 Ne6 31. Nd5 Kg7 32. Bd6 Ng5 33. Ke2 h3 34. Rd1
(34. Rc3 Ne5 35. f4 Re1+ $1 36. Kxe1 h2) 34... Rxd1 35. Kxd1 Ne5 36. Ne3 h2 37.
Nf5+ Kg6 38. Ng3 Ne4 $1 39. Nh1 Nxd6 0-1

[Event "New York exh"]
[Site "?"]
[Date "1989.??.??"]
[Round "1"]
[White "COMP Deep Thought"]
[Black "Kasparov G"]
[Result "0-1"]
[ECO "B22"]
[PlyCount "104"]
[EventDate "1989.??.??"]
[SourceDate "2003.06.15"]

1. e4 c5 2. c3 {Esta variante de la siciliana ha sido utilizada por BELLE con
buenos resultados. No esta claro si acaso es lo suficientemente agresiva para
enfrentar a Kasparov, mas aun si el conocia las partidas anteriores de
DeepThought en don de habia utilizado esta apertura.} 2... e6 3. d4 d5 4. exd5
exd5 5. Nf3 Bd6 6. Be3 {Este alfil no se movera nunca mas.} 6... c4 7. b3 cxb3
8. axb3 Ne7 9. Na3 Nbc6 10. Nb5 {DeepThought entra en terrenos turbios.Esta
jugada es solo una perdida de tiempo.} 10... Bb8 11. Bd3 Bf5 12. c4 {Esta jugad
a crea un peon pasado negro en la columna a y adem's debilita la casilla b4,
pero el real problema de DeepThought es un error en su codigo el cual prioriza
otras jugadas en vez de enrocar. De aca hasta la jugada 17 el programa tiene
muchas oportunidades de enrocar pero no lo hace.} 12... O-O 13. Ra4 $4 {
Una extrana forma de proteger b4, pero tipica del juego de computadoras.
Kasparov solo continua con su plan.} 13... Qd7 14. Nc3 Bc7 15. Bxf5 Qxf5 16.
Nh4 {En el espiritu de la jugada de torre sobre la cuarta fila. Los
programadores de DeepThought ya sospechaban seriamente de una falla en el
programa.} 16... Qd7 17. O-O {La audiencia aplaudio esta jugada!} 17... Rad8
18. Re1 {DeepThought evaluaba la posicion como ligera ventaja blanca. Despues
de la partida Kasparov acoto que las 2 jugadas siguientes deciden el curso del
juego.} 18... Rfe8 19. c5 Ba5 $1 20. Qd3 a6 21. h3 Bxc3 22. Qxc3 Nf5 23. Nxf5
Qxf5 {Las torres negras son muy fuertes y el caballo es mejor que el alfil.
Las negras tienen ventaja.} 24. Ra2 Re6 25. Rae2 Rde8 26. Qd2 f6 27. Qc3 h5 28.
b4 R8e7 29. Kh1 {El programa no encuentra jugadas utiles y decide esperar en
la tipica forma de los computadores. Mientras tanto Kasparov sigue mejorando
su posicion.} 29... g5 30. Kg1 g4 31. h4 Re4 32. Qb2 Na7 $1 33. Qd2 R4e6 34.
Qc1 Nb5 35. Qd2 {
DeepThought, el eterno optimista, aun cree que la posicion esta equilibrada.}
35... Na3 36. Qd1 Kf7 37. Qb3 Nc4 38. Kh2 Re4 39. g3 Qf3 40. b5 a5 {finalmente
Kasparov ha creado un peon pasado el cual sera la causa de derrota de DeepBlue.
DeepBlue tenia cerca de 35 minutos disponibles mientras que Kasparov 20.} 41.
c6 f5 42. cxb7 Rxb7 43. Kg1 f4 $1 44. gxf4 g3 45. Qd1 Rbe7 46. b6 gxf2+ 47.
Rxf2 Qxd1 48. Rxd1 Rxe3 {El programa ya podia abandonar, pero la instruccion
de abandono se realizaba con 7 puntos menos (una torre y 2 peones).} 49. Rg2
Nxb6 50. Rg5 a4 51. Rxh5 a3 52. Rd2 Re2 0-1

[Event "New York exh"]
[Site "?"]
[Date "1989.??.??"]
[Round "2"]
[White "Kasparov Gary"]
[Black "COMP Deep Thought"]
[Result "1-0"]
[ECO "D20"]
[PlyCount "73"]
[EventDate "1989.??.??"]
[SourceDate "2003.06.15"]

1. d4 d5 2. c4 dxc4 3. e4 {Una linea bastante agresiva y tipica del estilo de
Kasparov. Ahora los problemas de DeepThought son su limitado libro de
aperturas y sus deseos de mantener el peon extra del gambito.} 3... Nc6 4. Nf3
Bg4 5. d5 Ne5 6. Nc3 c6 $2 {Una jugada que no tiene sentido. Mejor era 6...Nf6
con tal de desarrollar rapidamente el flanco de Rey.} 7. Bf4 Ng6 8. Be3 cxd5 9.
exd5 Ne5 {El negro continua aun con la absurda idea de mantener el peon extra
lo cual lo retrasa demasiado en desarrollo.} 10. Qd4 {El primer golpe fuerte
de Kasparov. Ahora DeepThought captura un segundo peon pero la ventaja de
desarrollo del blanco decide la partida.} 10... Nxf3+ 11. gxf3 Bxf3 12. Bxc4 {
Intentando Bb5+} 12... Qd6 13. Nb5 Qf6 14. Qc5 Qb6 (14... Bxh1 15. Nc7+ Kd8 16.
Nxa8 Qd6 17. Qxa7 {con gran ataque.}) 15. Qa3 e6 {
Solo en este momento DeepThought evaluo su situacion como inferior.} 16. Nc7+
Qxc7 17. Bb5+ Qc6 18. Bxc6+ bxc6 19. Bc5 Bxc5 20. Qxf3 Bb4+ {
La unica ocasion en que Kasparov estuvo en jaque en las 2 partidas del match.}
21. Ke2 cxd5 22. Qg4 Be7 23. Rhc1 Kf8 24. Rc7 Bd6 25. Rb7 Nf6 26. Qa4 a5 27.
Rc1 h6 28. Rc6 Ne8 29. b4 Bxh2 30. bxa5 Kg8 31. Qb4 Bd6 32. Rxd6 Nxd6 33. Rb8+
Rxb8 34. Qxb8+ Kh7 35. Qxd6 Rc8 36. a4 Rc4 37. Qd7 1-0

[Event "Harvard"]
[Site "?"]
[Date "1990.??.??"]
[Round "?"]
[White "Karpov Anatoly"]
[Black "COMP Deep Thought"]
[Result "1-0"]
[ECO "B12"]
[PlyCount "129"]
[EventDate "1990.??.??"]
[SourceDate "2003.06.15"]

1. e4 c6 2. d4 d5 3. Nd2 g6 4. c3 Bg7 5. e5 f6 6. f4 Nh6 7. Ngf3 O-O 8. Be2
fxe5 9. fxe5 c5 10. Nb3 cxd4 11. cxd4 Nc6 12. O-O Qb6 13. Kh1 a5 14. a4 Bf5 15.
Bg5 Be4 16. Nc5 Qxb2 17. Nxe4 dxe4 18. Rb1 Qa3 19. Bc1 Qc3 20. Bd2 Qa3 21. Bc1
Qc3 22. Rb3 Qa1 23. Bc4+ Kh8 24. Bxh6 Qxd1 25. Bxg7+ Kxg7 26. Rxd1 exf3 27.
gxf3 Ra7 28. Bd5 Rd8 29. Rb5 Ra6 30. Be4 Ra7 31. Bd5 Ra6 32. Rc5 Rd7 33. Kg2
Rb6 34. Bxc6 bxc6 35. Kf2 Rd5 36. Rxd5 cxd5 37. Rc1 Rb4 38. Ke3 Rxa4 39. Rc5 e6
40. Rc7+ Kg8 41. Re7 Ra3+ 42. Kf4 Rd3 43. Rxe6 Rxd4+ 44. Kg5 Kf7 45. Ra6 a4 46.
f4 h6+ 47. Kg4 Rc4 48. h4 Rd4 49. Rf6+ Kg7 50. Ra6 Kf7 51. h5 gxh5+ 52. Kf5 Kg7
53. Ra7+ Kf8 54. e6 Re4 55. Rd7 Rc4 56. Rxd5 h4 57. Rd3 Ke7 58. Rd7+ Kf8 59.
Rh7 h5 60. Ke5 h3 61. f5 Kg8 62. Rxh5 a3 63. Rxh3 a2 64. Ra3 Rc5+ 65. Kf6 1-0

[Event "Philadelphia, USA"]
[Site "Philadelphia, USA"]
[Date "1996.??.??"]
[Round "4"]
[White "Kasparov, Garry"]
[Black "Deep Blue"]
[Result "1/2-1/2"]
[ECO "D30"]
[PlyCount "100"]
[EventDate "1996.??.??"]
[SourceDate "2003.06.15"]

1. Nf3 d5 2. d4 c6 3. c4 e6 4. Nbd2 Nf6 5. e3 Nbd7 6. Bd3 Bd6 7. e4 dxe4 8.
Nxe4 Nxe4 9. Bxe4 O-O 10. O-O h6 11. Bc2 e5 12. Re1 exd4 13. Qxd4 Bc5 14. Qc3
a5 15. a3 Nf6 16. Be3 Bxe3 17. Rxe3 Bg4 18. Ne5 Re8 19. Rae1 Be6 20. f4 Qc8 21.
h3 b5 22. f5 Bxc4 23. Nxc4 bxc4 24. Rxe8+ Nxe8 25. Re4 Nf6 26. Rxc4 Nd5 27. Qe5
Qd7 28. Rg4 f6 29. Qd4 Kh7 30. Re4 Rd8 31. Kh1 Qc7 32. Qf2 Qb8 33. Ba4 c5 34.
Bc6 c4 35. Rxc4 Nb4 36. Bf3 Nd3 37. Qh4 Qxb2 38. Qg3 Qxa3 39. Rc7 Qf8 40. Ra7
Ne5 41. Rxa5 Qf7 42. Rxe5 fxe5 43. Qxe5 Re8 44. Qf4 Qf6 45. Bh5 Rf8 46. Bg6+
Kh8 47. Qc7 Qd4 48. Kh2 Ra8 49. Bh5 Qf6 50. Bg6 Rg8 1/2-1/2

[Event "Philadelphia, USA"]
[Site "Philadelphia, USA"]
[Date "1996.??.??"]
[Round "5"]
[White "Deep Blue"]
[Black "Kasparov, Garry"]
[Result "0-1"]
[ECO "C47"]
[PlyCount "90"]
[EventDate "1996.??.??"]
[SourceDate "2003.06.15"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8.
exd5 cxd5 9. O-O O-O 10. Bg5 c6 11. Qf3 Be7 12. Rae1 Re8 13. Ne2 h6 14. Bf4 Bd6
15. Nd4 Bg4 16. Qg3 Bxf4 17. Qxf4 Qb6 18. c4 Bd7 19. cxd5 cxd5 20. Rxe8+ Rxe8
21. Qd2 Ne4 22. Bxe4 dxe4 23. b3 Rd8 {Luego de realizar esta jugada Kasparov
ofrecio las tablas. El equipo de DeepBlue se sintio algo confundido y
presionado por la oferta, puesto que no se habia estipulado quien debia
decidir acerca de las ofertas de tablas y en que manera. DeepBlue ya habia
decidido su proximo movimiento por lo cual la partida continuo.} 24. Qc3 f5 25.
Rd1 {Una jugada a todas luces inferior pues clava el caballo sin necesidad.}
25... Be6 26. Qe3 Bf7 27. Qc3 f4 {De pronto la mayoria negra en el flanco de
rey esta demasiado avanzada y Kasparov tiene chances de inclinar la balanza a
su favor. Segun Feng Hsu el programa tenia dificultades en evaluar de manera
adecuada los peligros de las mayorias de peones avanzadas.} 28. Rd2 Qf6 29. g3
Rd5 30. a3 Kh7 31. Kg2 Qe5 32. f3 e3 {
Luego de esto la partida esta decidida en favor de las negras.} 33. Rd3 e2 34.
gxf4 e1=Q 35. fxe5 Qxc3 36. Rxc3 Rxd4 37. b4 Bc4 38. Kf2 g5 39. Re3 Rd2+ 40.
Ke1 Rd3 41. Kf2 Kg6 42. Rxd3 Bxd3 43. Ke3 Bc2 44. Kd4 Kf5 45. Kd5 h5 0-1

[Event "Philadelphia, USA"]
[Site "Philadelphia, USA"]
[Date "1996.??.??"]
[Round "6"]
[White "Kasparov, Garry"]
[Black "Deep Blue"]
[Result "1-0"]
[ECO "D30"]
[PlyCount "85"]
[EventDate "1996.??.??"]
[SourceDate "2003.06.15"]

1. Nf3 d5 2. d4 c6 3. c4 e6 4. Nbd2 Nf6 5. e3 c5 6. b3 Nc6 7. Bb2 cxd4 8. exd4
Be7 9. Rc1 O-O 10. Bd3 Bd7 11. O-O Nh5 12. Re1 Nf4 13. Bb1 Bd6 14. g3 Ng6 15.
Ne5 Rc8 16. Nxd7 Qxd7 17. Nf3 Bb4 $2 {
Una amenaza sin mucho sentido que deja expuesto al alfil.} 18. Re3 Rfd8 19. h4
Nge7 20. a3 Ba5 21. b4 Bc7 22. c5 {Las blancas ya tienen ventaja gracias a su
mayoria y espacio en el flanco de dama.} 22... Re8 23. Qd3 g6 24. Re2 Nf5 25.
Bc3 h5 26. b5 Nce7 27. Bd2 Kg7 28. a4 Ra8 29. a5 a6 $2 30. b6 Bb8 $4 {
DeepBlue evalua como mejor mantener su alfil sobre la diagonal b8-h2 pero no
entiende que el alfil nunca mas podra salir de alli lo cual tambien involucra
a la torre!} 31. Bc2 Nc6 32. Ba4 Re7 33. Bc3 Ne5 34. dxe5 Qxa4 35. Nd4 Nxd4 36.
Qxd4 Qd7 {El programa ha logrado cambiar algunas piezas pero la derrota es
solo cosa de tiempo.} 37. Bd2 Re8 38. Bg5 Rc8 39. Bf6+ Kh7 40. c6 $1 bxc6 41.
Qc5 Kh6 42. Rb2 Qb7 43. Rb4 {Las negras estan totalmente paralizadas y no hay
forma de evitar una apertura de lineas en el flanco de rey con g4.} 1-0

[Event "Philadelphia, USA"]
[Site "Philadelphia, USA"]
[Date "1996.02.10"]
[Round "1"]
[White "Deep Blue"]
[Black "Kasparov, Garry"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "73"]
[EventDate "1996.??.??"]
[SourceDate "2003.06.15"]

1. e4 c5 2. c3 d5 {El arma favorita de DeepBlue contra la siciliana.} 3. exd5
Qxd5 4. d4 Nf6 5. Nf3 Bg4 6. Be2 e6 7. h3 Bh5 8. O-O Nc6 9. Be3 cxd4 10. cxd4
Bb4 {Una juegada nueva en ese momento. Se habia jugado Be7.} 11. a3 Ba5 12. Nc3
Qd6 13. Nb5 Qe7 {
Una jugada condenada por los espectadores quienes recomendaban Qd5.} 14. Ne5 $1
Bxe2 15. Qxe2 O-O 16. Rac1 Rac8 17. Bg5 Bb6 $6 {
Esto debilitara el flanco de rey del negro. Mejor era Rfd8.} 18. Bxf6 $1 gxf6 (
18... Qxf6 19. Nd7) 19. Nc4 Rfd8 $2 (19... Nxd4 20. Nxd4 Bxd4 21. Qg4+) (19...
Bc7 {evitando los peones doblados.}) 20. Nxb6 axb6 21. Rfd1 f5 22. Qe3 Qf6 23.
d5 $1 Rxd5 24. Rxd5 exd5 25. b3 $1 {Sorprende la calma conque trata el juego
DeepBlue, pero la pesima estructura del negro hace sus peones indefendibles.}
25... Kh8 26. Qxb6 Rg8 {Sintiendose inferior Kasparov busca crear un ataque
sobre el rey enemigo pero DeepBlue responde con absoluta sangre fria.} 27. Qc5
d4 28. Nd6 f4 29. Nxb7 $1 {Haciendo caso omiso a las amenazas del negro.} 29...
Ne5 30. Qd5 f3 31. g3 Nd3 32. Rc7 Re8 33. Nd6 $1 Re1+ 34. Kh2 Nxf2 35. Nxf7+
Kg7 36. Ng5+ Kh6 37. Rxh7+ {37... Kg6 38.Qg8 Kf5 39.Nf3 ganando.} 1-0

[Event "Philadelphia, USA"]
[Site "Philadelphia, USA"]
[Date "1996.02.11"]
[Round "2"]
[White "Kasparov, Garry"]
[Black "Deep Blue"]
[Result "1-0"]
[ECO "E04"]
[PlyCount "146"]
[EventDate "1996.??.??"]
[SourceDate "2003.06.15"]

1. Nf3 d5 2. d4 e6 3. g3 c5 4. Bg2 Nc6 5. O-O Nf6 6. c4 dxc4 7. Ne5 Bd7 8. Na3
cxd4 9. Naxc4 Bc5 10. Qb3 O-O 11. Qxb7 Nxe5 12. Nxe5 Rb8 13. Qf3 Bd6 14. Nc6
Bxc6 15. Qxc6 e5 16. Rb1 Rb6 17. Qa4 Qb8 18. Bg5 Be7 19. b4 Bxb4 20. Bxf6 gxf6
21. Qd7 Qc8 22. Qxa7 Rb8 23. Qa4 Bc3 24. Rxb8 Qxb8 25. Be4 Qc7 26. Qa6 Kg7 27.
Qd3 Rb8 28. Bxh7 Rb2 29. Be4 Rxa2 30. h4 {La ventaja del blanco radica en el
absoluto control de las casillas blancas y la mejor situacion de su alfil.Esto
sumado al peligro del peon blanco de la columna h. DeepBlue no supo percibir
el peligro que implicaba estas desventajas estrategicas.} 30... Qc8 31. Qf3 Ra1
32. Rxa1 Bxa1 33. Qh5 Qh8 34. Qg4+ Kf8 35. Qc8+ Kg7 36. Qg4+ Kf8 37. Bd5 Ke7
38. Bc6 Kf8 39. Bd5 Ke7 40. Qf3 Bc3 41. Bc4 Qc8 42. Qd5 Qe6 43. Qb5 Qd7 44.
Qc5+ Qd6 45. Qa7+ Qd7 46. Qa8 Qc7 47. Qa3+ Qd6 48. Qa2 f5 49. Bxf7 e4 50. Bh5
Qf6 51. Qa3+ Kd7 52. Qa7+ Kd8 53. Qb8+ Kd7 54. Be8+ Ke7 55. Bb5 Bd2 56. Qc7+
Kf8 57. Bc4 Bc3 58. Kg2 Be1 59. Kf1 Bc3 60. f4 exf3 61. exf3 Bd2 62. f4 Ke8 63.
Qc8+ Ke7 64. Qc5+ Kd8 65. Bd3 Be3 66. Qxf5 Qc6 67. Qf8+ Kc7 68. Qe7+ Kc8 69.
Bf5+ Kb8 70. Qd8+ Kb7 71. Qd7+ Qxd7 72. Bxd7 Kc7 73. Bb5 Kd6 1-0

[Event "Philadelphia, USA"]
[Site "Philadelphia, USA"]
[Date "1996.02.13"]
[Round "3"]
[White "Deep Blue"]
[Black "Kasparov, Garry"]
[Result "1/2-1/2"]
[ECO "B22"]
[PlyCount "77"]
[EventDate "1996.??.??"]
[SourceDate "2003.06.15"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Bg4 6. Be2 e6 7. O-O Nc6 8. Be3
cxd4 9. cxd4 Bb4 10. a3 Ba5 11. Nc3 Qd6 12. Ne5 Bxe2 13. Qxe2 Bxc3 14. bxc3
Nxe5 15. Bf4 Nf3+ 16. Qxf3 Qd5 17. Qd3 Rc8 18. Rfc1 Qc4 19. Qxc4 Rxc4 20. Rcb1
b6 21. Bb8 Ra4 22. Rb4 Ra5 23. Rc4 O-O 24. Bd6 Ra8 25. Rc6 b5 26. Kf1 Ra4 27.
Rb1 a6 28. Ke2 h5 29. Kd3 Rd8 30. Be7 Rd7 31. Bxf6 gxf6 32. Rb3 Kg7 33. Ke3 e5
34. g3 exd4+ 35. cxd4 Re7+ 36. Kf3 Rd7 37. Rd3 Raxd4 38. Rxd4 Rxd4 39. Rxa6
1/2-1/2

[Event "New York man vs machine"]
[Site "New York"]
[Date "1997.05.03"]
[Round "1"]
[White "Kasparov, Gary"]
[Black "Comp Deep Blue"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "2785"]
[Annotator "Nunn"]
[PlyCount "89"]
[EventDate "1997.05.03"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. Nf3 d5 2. g3 Bg4 3. b3 {Kasparov adopts a very quiet opening - not a bad
policy against a computer. Kasparov waehlt eine sehr ruhige Eroeffnung - keine
schlechte Politik bei Partien gegen einen Computer} 3... Nd7 4. Bb2 e6 5. Bg2
Ngf6 6. O-O c6 7. d3 Bd6 8. Nbd2 O-O 9. h3 Bh5 {By a slightly riundabout route
we have reached a position which has occurred many times in master and
grandmaster chess. White's basic plan is to gain space in the ecntre with e4.
Black will sooner or later have to deal with the threat of e5, either by
moving his minor pieces out of the way, or by playing ...e5 himself. In the
latter case, there will be a slight weakness on f5 which might be able to
exploit by Nh4-f5. At the moment this last manoeuvre is impossible, because
the f3-knight is pinned, but this explains why one often sees the odd-looking
move Qe1 in this system: White wants to support the push of his e-pawn, while
at the same time freeing his knight from the pin. Auf Umwegen haben wir eine
Stellung erreicht, die man in vielen Meister- und GM-Partien findet. Der
weisse Plan besteht darin, im Zentrum Platz mit e4 zu gewinnen. Schwarz muss
frueher oder spaeter mit der Drohung e5 fertig werden, indem er entweder seine
Leichtfiguren aus dem Weg raeumt oder selber ...e5 spielt. Im zweiten Falle
entsteht eine leichte Schwaechung des Feldes f5, die Weiss mit Sf3-h4-f5
ausnuetzen koennte. Im Augenblick ist das Manoever natuerlich unmoeglich, da
der Springer gefesselt ist. Aber man versteht, warum der Weissspieler in
diesem System haeufig zum merkwuerdig aussehenden Zug De1 greift: Weiss will
den Vorstoss des e-Bauern unterstuetzen und gleichzeitig den Springer von der
Fesslung befreien.} 10. e3 {A very unusual move, indeed I can find no examples
of it from practical play. The normal moves here are 10 e4 and 10 Qe1. Of the
two, I would judge 10 e4 to be the more flexible. In this way White can
reserve the option of either Qe1 or Qe2, depending on Black's reply. The
merits of 10 e3 are rather hard to find; Kasparov soon adopts the Qe1 and e4
plan, but having lost a tempo in the process. Perhaps his idea was simply to
take DB out of its opening book.  Ein sehr ungewoehnlicher Zug, fuer den ich
kein Beispiel in praktischen Partien finde. Die normalen Zuege sind hier 10.e4
und 10.De1. Den ersten halte ich fuer den flexibleren. Weiss haelt sich je
nach schwarzer Erwiderung die beiden Optionen De1 oder De2 offen. Der Vorteil
von 10.e3 ist nicht leicht zu erkennen. Kasparov waehlt den Plan De1 nebst e4,
aber er hat dabei ein Tempo verloren. Vielleicht wollte er lediglich Deep Blue
aus dem Eroeffnungsbuch werfen.} 10... h6 {Kasparov's deviation at once earns
its reward. Instead of putting the extra tempo to use by developing queenside
counterplay, for example by 10...a5, the computer makes a pawn move which is
worse than useless, because it weakens the kingisde slightly. In a few moves
we will see the importance of this. Now that the extra tempo has been handed
back, the balance again slightly favours White and now the computer is on its
own. Kasparovs Abweichung traegt sofort Fruechte. Statt das Extratempo fuer
die Entwicklung von Gegenspiel am Damenfluegel, etwa mit 10...a5, zu nutzen,
macht der Rechner einen Zug, der schlimmer als wertlos ist, weil er den
Koenigsfluegel etwas schwaecht. In einigen Zuegen werden wir sehen, warum das
so wichtig ist. Somit hat Weiss das Extratempo zurueckerhalten, und die
Stellung ist guenstiger fuer Weiss, besonders weil der Computer eigenstaendig
spielen muss.} 11. Qe1 Qa5 {The play of DB in the phase of the game leaves
much to be desired. It quite reasonably plans ...Ba3 to exchange off the
active bishop on b2, but this plan is easily countered and then the queen is
doing little on a5. Die Spielweise von Deep Blue in dieser Partiephase laesst
viel zu wuenschen uebrig. Der vernuenftige Plan ...La3 mit Abtausch des
aktiven Laeufers auf b2 wird leicht pariert, und danach hat die Dame keine
Zukunft auf dem Feld a5.} 12. a3 Bc7 $6 {And this is very odd. There are two
possible reasons behind this move. First of all, it may simply be anticipating
e4-e5 by White; secondly, DB may want to have its queen defended in case of a
line such as  Ein merkwuerdiger Zug, fuer den ich zwei moegliche Gruende sehe.
Zunaechst einmal kann er in Erwartung eines weissen Bauernvorstosses e3-e4-e5
gespielt worden sein; zum anderen koennte Deep Blue seine Dame decken wollen,
um Varianten wie} (12... Rad8 13. Bxf6 Nxf6 14. Ne4 Qxe1 15. Nxf6+ gxf6 16.
Rfxe1 {although this is nothing to fear as Black's active bishops easily
compensate for the insignificant weakeneing of the kingside pawn structure. zu
vermeiden, obwohl die aktiven schwarzen Laeufer fuer die geringfuegige
Schwaechung der Bauernstruktur am Koenigsfluegel genuegend Kompensation bieten.
}) ({I would prefer Ich haette den Zug} 12... Bg6 {which prepares to answer e4
by ...e5. The prophylactic ...Bg6 is necessary in this case because otherwise .
..e5 can be met by Nh4. This is particularly strong because of the poor move ..
.h6, which means that after a possible exchnage of knight for bishop on g6,
Black cannot make the natural recapture with the h-pawn. Thus Black has to
play ...Bg6 in advance, ready to meet Nh4 by ...Bh7. In this phase of the game
DB just responds to each momentary problem on a move-by-move, without creating
any coherent plan for developing counterplay. In this respect Kasparov's
choice of opening appears very intelligent.  bevorzugt, der auf e4 die Antwort
...e5 vorbereitet. Das prophylaktische ...Lg6 ist dabei notwendig, da sonst ...
e5 durch Sh4 entkraeftet wird. Das ist besonders effektiv nach dem schwachen
Zug ...h6, weil nach dem Abtausch des Springers fuer den Laeufer auf g6
Schwarz nicht mit dem h-Bauern wiedernehmen kann. Somit muss Schwarz im voraus
...Lg6 spielen, um auf Sh4 mit ...Lh7 zu antworten. In dieser Partiephase
reagiert Deep Blue Zug fuer Zug auf jedes auftauchende Problem, ohne einen
zusammenhaengenden Plan fuer Gegenspiel zu entwickeln. In dieser Hinsicht
scheint Kasparovs Eroeffnungwahl sehr klug gewesen zu sein.}) 13. Nh4 {
A rather awkward move to meet. The threat is 14 g4 Bg6 15 Nxg6, and Black has
to make the ugly capture ...fxg6. Nevertheless, I think that this would have
been less serious than the further kingisde weakening resulting from Black's
next move. Ein unbequemer Zug. Die Drohung ist 14.g4 Lg6 15.Sxg6, und Schwarz
muss den haesslichen Schlagzug ...fxg6 ausfuehren. Dennoch glaube ich, dass es
weniger ernst gewesen waere als die Schwaechung des Koenigsfluegels, die nun
folgt.} 13... g5 $2 14. Nhf3 e5 {All this looks absolutely horrible to the
human eye. Having pushed both e- and g-pawns, the f5-square has become a
serious weakness. If White could plant a knight there, then the game would be
decided. However, DB isn't as stupid as that; there is no straightforward
route by which a knight can reach the key square. Nevertheless, this long-term
weakness remains a lasting burden for Black. Das sieht alles fuer das
menschliche Auge ziemlich schrecklich aus. Durch den Vorstoss der e- und
g-Bauern ist das Feld f5 sehr schwach geworden. Kann Weiss einen Springer dort
plazieren, waere die Partie bereits entschieden. Ganz so dumm ist Deep Blue
freilich nicht. Es gibt fuer den Springer keinen direkten Weg zum
Schluesselfeld. Dennoch bleibt die langfristige Schwaeche eine bleibende Last
fuer Schwarz.} 15. e4 {Kasparov at once takes steps to fix the weakness on f5.
Kasparov ergreift sofort Massnahmen, um die Schwaeche von f5 festzuschreiben.}
15... Rfe8 16. Nh2 {Kasparov proceeds cautiously. His plan is Qc1, Re1 and
then Nf1-e3-f5. This is rather slow, but as White's position is solid if will
be hard for Black to develop ny real counterplay. Kasparov geht vorsichtig ans
Werk. Sein Plan ist Dc1, Te1 und dann Sf1-e3-f5. Das ist ziemlich langsam,
aber da die weisse Stellung sehr stabil ist, wird es fuer Schwarz nicht leicht
sein, ein echtes Gegenspiel aufzuziehen.} ({So far as I can see, he could have
started this plan immediately with Soweit ich es beurteilen kann, haette Weiss
den Plan sofort mit} 16. Qc1 {, since einleiten koennen, da} 16... g4 {
is not a worry because of keine Drohung darstellt, denn Weiss koennte mit} 17.
Nh4 {and the knight takes a short cut to f5. den Springer auf kuerzestem Weg
nach f5 bringen.}) 16... Qb6 17. Qc1 a5 {At last DB hits upon a plan for
developing counterplay, although in this prticular position it is not very
effective. The natural follow-up is ...a4 to induce b4, and then ...c5.
However, ...c5 is hard to arrange because of the pressure on d5, and if Black
exchanges first on e4, then the route Nc4-e3-f5 is opened up for the knight on
d2. We can see how, time and time again, Black's naturalplans are frstrated
because they would seriously expose the weakness on f5. Endlich findet Deep
Blue einen Plan, wie er Gegenspiel erhalten kann. Allerdings ist der Plan in
dieser Stellung nicht sehr effektiv. Die natuerliche Fortsetzung waere ...a4,
um b4 zu provozieren, wonach ...c5 folgt. Allerdings laesst sich ...c5 wegen
des Drucks auf d5 nur schwer durchsetzen, und wenn Schwarz zunaechst auf e4
tauscht, dann ist der Weg fuer Sd2-c4-e3-f5 offen. Wir sehen immer wieder in
dieser Partie, wie die natuerlichen Plaene von Schwarz durch die Schwaeche von
f5 durchkreuzt werden.} 18. Re1 Bd6 19. Ndf1 dxe4 {Now that the knight has
moved away from d2, the possibility of Nc4 disappears and so this exchnage
becomes feasible. However, the kniught is already on its way to f5 by a
different route. Jetzt, wo der Springer von d2 weggezogen ist, verschwindet
die Moeglichkeit von Sc4, also wird der Abtausch ausfuehrbar. Aber der
Springer ist bereits auf dem Wege nach f5, allerdings auf einer anderen Route.}
20. dxe4 Bc5 21. Ne3 Rad8 22. Nhf1 {Black has hit upon a good method of
keeping the knight out of f5 , temporarily at any rate. The f2-pawn is quite
hard to defend, and until White nullfifies the pressure against it along the
b6-f2 diagonal, the knight cannot hop into f5. Kasparov's idea is Nd2-c4; then,
if Black wants to mainatin the pressure against f2 he must play ...Qa7, but
White continues with b4, exploiting the line-up of a1-rook with the enemy
queen, and Black is in trouble. Schwarz hat eine gute Methode gefunden, den
Springer von f5 fernzuhalten, jedenfalls voruebergehend. Der f2-Bauer laesst
sich schwer verteidigen, und bevor Weiss den Druck auf der b6-f2 Diagonale
neutralisiert hat, kann der Springer nicht nach f5 huepfen. Kasparovs Idee ist
Sd2-c4; will Schwarz danach den Druck auf f2 aufrechterhalten, muss er ...Da7
spielen, aber Weiss setzt mit b4 fort, und da der a-Turm die Dame im Auge hat,
geraet Schwarz in Schwierigkeiten.} 22... g4 {The computer desperately seeks
to disturb White's plan. Although this move creates further kingisde
weaknesses, it enable Black to develop some piece activity. This is the
critical phase. Everybody who has played a computer knows the scenario: you
get a strategically winning position, the computer makes some desperate
tactical lunge, you make a couple of inaccuracies and suddenly the machine is
all over you. Der Computer versucht verzweifelt, den weissen Plan zu stoeren.
Obwohl dieser Zug weitere Schwaechen am Koenigsfluegel bewirkt, bekommt
Schwarz aktiveres Figurenspiel. Das ist eine kritische Phase. Jeder, der gegen
einen Computer gespielt hat, kennt das Szenario: man bekommt eine strategische
Gewinnstellung, der Computer macht einen verzweifelten taktischen Vorstoss,
man begeht einige kleine Ungenauigkeiten, und ploetzlich hat die Maschine die
Oberhand.} 23. hxg4 Nxg4 24. f3 $2 {In this desire to achieve his straegic
ends without making the slightest concession, Kasparov commits an inaccuracy
which allows the machine to develop significant counterplay. Kasparov will
seine strategischen Ziele ohne Konzessionen erreichen. Er begeht infolgedessen
eine ernsthafte Ungenauigkeit und erlaubt, dass die Maschine signifikantes
Gegenspiel bekommt.} ({The most obvious plan is Der offensichtlichste Plan ist
} 24. Nxg4 Bxg4 25. Ne3 {.  Kasparov probably realised that after .  Kasparov
hat wahrscheinlich erkannt, dass es nach} 25... Be6 {, it is not so easy to
make progress, because Black has manoeuvred his light-squared bishop to a
reasonable active square. For example 26 Qd1, heading for h5, is met by 26...
Bd4. However, I think that this was his best option; after nicht leicht ist,
Fortschritte zu erzielen, weil Schwarz seinen weissfeldrigen Laeufer auf ein
verhaeltnismaessig aktives Feld gebracht hat. Zum Beispiel wird 26.Dd1, mit
dem Ziel Dh5, durch 26...Ld4 durchkreuzt. Allerdings glaube ich, dass es seine
beste Option war; nach} 26. Re2 Kh7 27. Qe1 {White's remaining pieces come
into play, and Black's kingisde weaknesses are not going to run away. Here,
for example kommen die uebrigen weissen Figuren ins Spiel, waehrend die
schwarzen Schwaechen am Koenigsfluegel nicht verschwinden. Nach z.B.} 27... Bd4
{runs into kommt} 28. Bxd4 exd4 29. Nd5 $1 cxd5 30. exd5 {
with a large advantage for White. mit einem deutlichen Vorteil fuer Weiss.})
24... Nxe3 25. Nxe3 Be7 $1 {An excellent defensive move. A human would find it
hard to abandon the pressure on the b6-g1 diagonal, but the computer ispots
that the bishop has an even better square on g5, both shielding the kingside
weaknesses and pinning the e3-knight from a different sirection. Ein
hervorragender Verteidigungszug. Ein Mensch haette es schwer gefunden, den
Druck auf der b6-g1 Diagonale aufzugeben, aber der Computer merkt, dass der
Laeufer einen noch besseren Platz auf g5 hat, von wo aus er die Schwaechen am
Koenigsfluegel abschirmt und gleichzeitig den Springer auf e3 aus einer ganz
anderen Richtung fesselt.} 26. Kh1 Bg5 27. Re2 {Kasparov recovers well. He
intends Qg1 followed by Nf5, and the damage is repaired, but the computer
strikes first. Kasparov hat das gut ueberstanden. Er beabsichtigt Dg1, gefolgt
von Sf5, und der durch die fruehere Ungenauigkeit entstandene Schaden ist
beseitigt. Aber der Computer schlaegt zuerst zu.} 27... a4 {A good introductory
move. As we shall see, having c4 avilable helps Black. Ein guter
Einleitungszug. Wie wir sehen werden, hilft die Verfuegbarkeit von c4 Schwarz.}
28. b4 f5 {Correct. Black must make use of his temporary piece activity to
make some inroads. Passive play would allow White to get back on track
exploiting his strategic advantages. Richtig. Schwarz muss seine
voruebergehende Figurenaktivitaet dazu benutzen, um vorwaerts zu kommen.
Passives Spiel wuerde Weiss erlauben, seine strategischen Vorteile
auszuspielen.} 29. exf5 $5 ({If White tries Wenn Weiss} 29. Qe1 fxe4 30. Nc4 {
versuchen wuerde, dann zeigt uns} 30... Qa6 {Now we see why one reason why
Black prepared this line with ...a4; the attack against the c4-knight is
awkward. einen Grund, warum Schwarz dieses Abspiel mit ...a4 vorbereitete. Der
Angriff gegen den Springer auf c4 wirkt unbeholfen, und nach} 31. Rxe4 Nf6 {
and White must jettison some material. He will always get some compensation,
for example here 32 Nxe5 is unclear, but at least DB has randomised the game.
The move Kasparov plays alsoinvolves an exchnage sacrifice. muss Weiss
Material abwerfen. Wegen des geschwaechten Koenigsfluegels bekommt er einige
Kompensation z.B. ist hier 32.Sxe5 unklar, aber zumindest hat Deep Blue ein
Zufallselement in die Partie hineingebracht.  Der Zug von Kasparov fuehrt zu
einem Qualitaetsopfer.}) 29... e4 30. f4 Bxe2 ({Schwarz darf nicht gierig sein:
} 30... Bxf4 31. gxf4 Bxe2 32. Qd2 Bh5 {Forced, or else White also has the
possibility of Ng4 erzwungen, sonst hat Weiss die Moeglichkeit zu Sg4.} 33. Qc3
Re7 34. Nc4 Qc7 35. Qh8+ Kf7 36. Qxh6 {and wins. mit Gewinn.}) 31. fxg5 Ne5 {
Black must block the long diagonal. Schwarz muss die lange Diagonaleversperren.
} (31... hxg5 32. Nd5 {wins at once. gewinnt sofort.}) 32. g6 ({Nach} 32. gxh6
{spielt Schwarz} 32... Kh7 {is a more reasonable reply, when Black has much
better chances than in the game. und hat bessere Chancen als in der Partie.} ({
nicht} 32... Rd6 $2 {The Chess Monthly web site comments that 32 gxh6 Rd6
gives Black a decisive attack, although White can win in one move by 33 Nc4!.
wonach Weiss mit} 33. Nc4 $1 {einzuegig gewinnen kann.})) 32... Bf3 33. Bc3 {
A good prophylactic move. In many lines the queens are exchanged or White
would like to send his queen away to the kingside. In these cases it is
important not to allow ...Rd2. Ein guter Vorbeugezug. In vielen Varianten
werden die Damen getauscht, oder Weiss schickt seine Dame zum Koenigsfluegel.
In solchen Faellen ist es wichtig, ...Td2 zu verhindern.} 33... Qb5 $2 {
A serious error. DB sees that this will probably lead to the exchange of
queens, and has no objection in view of Black's material advantage. However,
in the ending White's advanced pawns and general grip on the poisition count
for more than the small material plus of rook for bishop and pawn. Instead,
Black should have kept the queens on the board. Ein ernsthafter Fehler. Deep
Blue erkennt, dass dies zum Damentausch fuehrt, und der Rechner hat nichts
dagegen. Schliesslich hat Schwarz Materialvorteil. Allerdings zaehlen im
Endspiel die verbundenen Freibauern von Weiss und seine generelle Beherrschung
der Stellung mehr als der kleine Materialvorteil von Turm gegen Laeufer und
Bauer.} ({Natuerlich sollte Schwarz die Damen auf dem Brett lassen. Eine
Moeglichkeit dazu waere} 33... h5 {is one possibility. In many line Black
gains a tempo because White acnnot now play his queen to f1 in one move. One
line runs  , und in vielen Varianten gewinnt Schwarz ein Tempo, da Weiss nun
seine Dame nicht nach f1 ziehen kann. Ein Beispiel dafuer ist} 34. Qe1 Qb5 35.
Qf1 Ng4 36. Nxg4 (36. Qxb5 cxb5 37. f6 Nxe3 38. f7+ Kf8 39. fxe8=Q+ Rxe8 40.
Bxf3 exf3 41. Kg1 {is probably a draw ist wahrscheinlich remis}) 36... hxg4 37.
Qxb5 cxb5 38. f6 Re6 {and Black can defend. und Schwarz kann sich verteidigen.}
) ({Another idea is Eine andere Idee ist} 33... Qc7 {intending to move the
queen over to the kingside. Either of these options would have left the
position unclear, whereas now Deep Blue slides downhill. mit der Absicht, die
Dame auf den Koenigsfluegel zu bringen. Jede dieser Optionen haette zu einer
unklaren Stellung gefuehrt, waehrend Deep Blue nach dem Textzug den Berg
herunterrutscht.}) 34. Qf1 Qxf1+ {Nun ist} ({Now} 34... Ng4 {
is impossible because of unmoeglich wegen} 35. Qxb5 cxb5 36. Nxg4 Bxg4 37. f6)
35. Rxf1 h5 36. Kg1 $1 {At first sight this position shouldn't be too bad for
Black, since the e5-knight's attack on the g6-pawn means that the pawns cannot
advance for the moment. However, Kasparov's move makes it all clear; he can
afford to take his time, because Black has no constructive moves. The
f3-bishop cannot move because of f6 and f7+, the knight must stay on e5 to
cover g6, and this ties down the e8-rook too. The rook on d8 cannot achieve
anything by itself, since the d-file penetration squares are under control,
which leaves only Black's king. Auf den ersten Blick sollte die Stellung fuer
Schwarz nicht allzu schlecht sein, da der Springer auf e5 den Vorstoss des
Bauern auf g6 fuer den Augenblick verhindert. Kasparovs Zuege machen indes
klar, dass er in Ruhe vorgehen kann, da Schwarz keine konstruktiven Zuege hat.
Der Laeufer auf f3 kann wegen f6 und f7+ nicht ziehen, der Springer muss auf
e5 verharren und g6 ueberwachen, was auch den Turm auf e8 bindet. Sein Partner
auf d8 kann alleine nichts ausrichten, da die Eindringfelder auf der d-Linie
alle unter weisser Kontrolle sind. Uebrig bleibt nur der schwarze Koenig.}
36... Kf8 37. Bh3 b5 38. Kf2 Kg7 $6 {Making life easy for White by allowing g4
under favourable circumstances. Macht das Leben fuer Weiss etwas leichter, da
nun g4 unter guenstigen Bedingungen moeglich wird.} 39. g4 Kh6 40. Rg1 hxg4 41.
Bxg4 Bxg4 42. Nxg4+ Nxg4+ 43. Rxg4 Rd5 44. f6 Rd1 {
See Frederic's piece for an analysis of 44...Rf5+.} (44... Rf5+ 45. Kg3 (45.
Ke2 Rg8 46. g7 Kh5 47. Rg2 Rf3 48. Bd4 Kh6 49. c3 Kh5 50. Rg1 Kh6 51. Rg4 Kh5
52. Rxe4 Rf5 53. Re6 Kg6 54. Rxc6 Re8+ 55. Kd2 Rh5 56. Re6 Rh2+ 57. Kd3 Rh3+
58. Be3 Rd8+ 59. Ke4 Kf7 60. Rc6) (45. Ke3 $1 Rf3+ 46. Ke2 Rxc3 47. f7 Rd8 48.
g7 Rxc2+ 49. Ke1 Rc1+ 50. Kf2 Rc2+ (50... e3+ 51. Kg2 e2 52. g8=Q Rxg8 53.
fxg8=Q Rg1+ 54. Kf3 Rxg4 55. Qh8+ Kg6 56. Qe8+ Kf5 57. Qf7+ Ke5 58. Kxg4) 51.
Kg3 Rc3+ 52. Kh4 Rc1 (52... Rd1 53. g8=N+) 53. g8=Q Rh1+ 54. Kg3 Rg1+ 55. Kf4
Rf1+ 56. Ke5 Rd5+ 57. Ke6 Rf6+ 58. Kxf6 Rd6+) 45... Rf3+ 46. Kh4 Rd8 47. f7 Rd5
) 45. g7 {A well-played game by Kasparov, from both the chess and the
psychological point of view. Eine gut gespielte Partie von Kasparov, sowohl
vom schachlichen als auch vom psychologischen Gesichtspunkt.} 1-0

[Event "New York man vs machine"]
[Site "New York"]
[Date "1997.05.04"]
[Round "2"]
[White "Comp Deep Blue"]
[Black "Kasparov, Gary"]
[Result "1-0"]
[ECO "C93"]
[BlackElo "2785"]
[Annotator "Nunn"]
[PlyCount "90"]
[EventDate "1997.05.03"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. e4 e5 {Certainly one of Black's most solid defences to 1 e4.} 2. Nf3 Nc6 3.
Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 h6 {Kasparov a
dopts a rather antiquated and passive defence known as the Smyslov Variation.
White's basic plan is to play d4 and then Sbd2-f1-g3. This securely defends
his central pawn structure, while making it possible for his remaining pieces
to be developed. The current thinking is that Black should obstruct this plan,
and the best way to do this is to adopt the Zaitsev System, in which Black
plays  Kasparov waehlt eine etwas antiquierte und passive Verteidigung, die
Smyslov-Variante. Der Grundplan von Weiss besteht darin, d4 und anschliessend
Sbd2-f1-g3 zu spielen. Damit wird seine Bauernstruktur im Zentrum sicher
verteidigt, waehrend gleichzeitig die uebrigen Figuren entwickelt werden
koennen. Die herrschende Meinung ist, dass Schwarz den Plan mit dem
Zaitsev-System (9...Lb7 10.d4 Te8 11.Sbd2 Lf8) durchkreuzen sollte. Der Druck
auf e4 macht 12.Sf1 unmoeglich, da 12...exd4 einen Bauern gewinnt. Also muss
der Springer auf d2 bleiben. Das wiederum blockiert den Laeufer auf c1 und
erschwert die weisse Entwicklung. Kasparov hat diese Variante wohl deswegen
abgelehnt, weil sie zu sehr scharfen, zweischneidigen Stellungen fuehren kann.}
(9... Bb7 10. d4 Re8 11. Nbd2 Bf8 {The pressure against e4 makes 12 Nf1
impossible (as 12...exd4 would win a pawn), and so the knight must stay on d2.
This, in turn, blocks in the bishop on c1 and makes White's development more
difficult. Kasparov probably did not like this line because it can lead to
very sharp and double-edged positions.}) 10. d4 Re8 11. Nbd2 Bf8 12. Nf1 {
Possible now because 12...exd4 13 cxd4 Nxe4 ... Jetzt ist der Zug moeglich,
weil nach 12...exd4 13.cxd4 Sxe4 Weiss mit der Gabel 14.Ld5 Material gewinnt.
Das funktioniert nur, weil Schwarz mit ...h6 ein Tempo verschwendet hat,
anstatt ...Lb7 wie in der obigen Anmerkung zu spielen.} 12... Bd7 (12... exd4
13. cxd4 Nxe4 {would lose material to 14 Bd5 forking the knights on e4 and c6.
This only works because Black has spent a tempo on ...h6 instead of playing ...
Bb7 as in the previous note.}) 13. Ng3 {Without any difficulty, White has
achieved his optimum piece set-up. Ohne groessere Schwierigkeiten hat Weiss
eine optimale Figurenaufstellung bekommen.} 13... Na5 14. Bc2 c5 15. b3 Nc6 16.
d5 {Deep Blue blocks the centre, even though blocked centres are supposed to
favour humans over computers. However, the machine's play in this game shows
that Deep Blue suffers from this defect far less than other computers. Deep
Blue blockiert das Zentrum, auch wenn das fuer den menschlichen Spieler
Vorteile bringen soll. Die weitere Partiefuehrung zeigt, dass dieser Rechner
weit besser in solchen Stellungen klarkommt als die anderen Schachprogramme.}
16... Ne7 17. Be3 {This is a theoretical position which has occurred a number
of times in grandmaster chess. The earlier games suggest that White is
slightly better, but with very accurate play Black retains equalising chances.
The first point to note is that Black faces more problems on the queenside
than the kingside. The e7-knight can move to g6, when Black has sufficient
minor pieces to defend the kingside. The queenside, on the other hand, is
looking a little bare. White's aim is to play a4 and b4. If Black is forced to
play ...c4, then White will have a virtually guaranteed advantage. He can
double or even triple on the a-file, and Black will probably be forced to
concede the a-file. In view of Black's total lack of counterplay elsewhere,
this could be very unpleasant for him. Moreover, the move ...c4 opens up the
e3-a7 diagonal for White's bishop, which would then control squares in the
very heart of Black's position. As Black's dark-squared bishop is locked away
on f8, there would be no means by which Black could contest this control. It
follows that Black must avoid meeting b4 by ...c4. This implies that his queen
and rooks belong on the queenside, supporting the c5-square and being prepared
to seize open files if pawn exchanges occur. Das ist eine theoretische
Stellung, die haeufig genug im Grossmeisterschach vorgekommen ist. Die
frueheren Partien legen nahe, dass Weiss etwas besser steht, aber mit genauem
Spiel behaelt Schwarz Ausgleichschancen. Man sollte sich als erstes
vergegenwaertigen, dass Schwarz am Damenfluegel die groesseren Probleme
besitzt. Der Springer auf e7 kann nach g6 ziehen, wonach Schwarz genuegend
Leichtfiguren hat, um den Koenigsfluegel abzusichern. Am Damenfluegel dagegen
sieht es karger aus. Weiss will a4 und b4 spielen. Falls Schwarz gezwungen ist,
...c4 zu spielen, hat Weiss fast immer einen Vorteil. Er kann auf der a-Linie
verdoppeln oder sogar verdreifachen, so dass Schwarz gezwungen ist, diese
Linie aufzugeben. Angesichts des Fehlens jeglichen Gegenspiels ist das sehr
unangenehm. Ferner oeffnet der Zug ...c4 die e3-a7-Diagonale fuer den weissen
Laeufer, der anschliessend die wichtigsten Felder der schwarzen Stellung
kontrolliert. Da der schwarzfeldrige Laeufer auf f8 eingesperrt ist, kann
Schwarz wenig dagegen unternehmen. Aus all dem folgt, dass Schwarz es
vermeiden muss, auf b4 ...c4 spielen zu muessen. Also muss er seine Dame und
die Tuerme am Damenfluegel behalten, um das Feld c5 zu stuetzen und die
offenen Linien zu besetzen, falls Bauern abgetauscht werden.} 17... Ng6 {
This is not really wrong, although other players have given preference to
arranging the queenside pieces, for example Das ist nicht wirklich schlecht,
obwohl andere Spieler einen anderen Aufbau bevorzugen, z.B.} (17... Qc7 {
17...Qc8 and 17...Nc8 have also been played, but these moves appear less
logical 17...Dc8 und 17...Sc8 wurden auch gespielt, sind aber wenigereinleuchte
nd  } 18. a4 {and now: und nun:} 18... bxa4 {
(ich persoenlich mag diesen Zug nicht, da er das Feld c4 aufgibt)} (18... Ng6
19. Qd2 Reb8 20. Ra2 Qb7 21. Rea1 Ne8 22. a5 Nf6 {
1/2-1/2 Gipslis-Reshevsky, Sousse Interzonal 1967}) (18... Rec8 19. Qd2 Ng6 20.
Ra2 Qb7 21. Rea1 (21. b4 cxb4 22. cxb4 bxa4 23. Bxa4 Bxa4 24. Rxa4 Rc4 {
is fine for Black}) 21... Ne8 22. Nh5 Be7 {
1/2-1/2 Gipslis-Matanovic, Sousse Interzonal 1967}) 19. bxa4 {
I don't like this move, which concedes the square c4} 19... Reb8 20. Qe2 {
followed by Nd2-c4, and White is slightly better. gefolgt von Sd2-c4, und
Weiss steht etwas besser.} 20... Ng6 (20... Qa5 21. Nd2 Ng6 22. Nc4 Qd8 23. Qd2
Ne8 24. a5 Ra7 25. Nb6 Nc7 26. Nxd7 Qxd7 27. Ba4 Qc8 28. c4 Rab7 {
Rodriguez,A-Augustin,J/Halle 1976/0-1 (62)}) 21. Reb1 Bc8 22. Nd2 Nd7 23. Nf5
Nf4 24. Qf3 g6 25. Ng3 Bg7 26. Nc4 Nb6 27. Nxb6 Rxb6 28. Rxb6 Qxb6 29. Rb1 Qc7
30. Ne2 Nxe2+ 31. Qxe2 {1/2-1/2 Balashov,Y-Augustin,J/Halle 1976   A
completely different plan, which is also playable, is 18...g6 19 Qd2 Kh7,
followed by ...Bg7, which improves the position of the dark-squared bishop.
This is especially useful if White later becomes active on the kingside with
f2-f4. Ein ganz anderer, ebenfalls spielbarer Plan ist 18...g6 19.Dd2 Kh7,
gefolgt von ...Lg7, womit die Stellung des schwarzfeldrigen Laeufers
verbessert wird. Das ist besonders nuetzlich, falls Weiss spaeter mit f2-f4 am
Koenigsfluegel aktiv wird.}) 18. Qd2 Nh7 $2 {The start of a very poor plan,
which costs Black a great deal of time. 18...Qg6 would transpose to the
previous note, while 18...Qc8 19 Kh2 Qb7 20 a4 Reb8 was played in
Knezevic-Djuric, Paris Open 1995 and led to a draw. As we can see, the most
popular plan involves ...Qc7 followed by ...Rec8 or ...Reb8. Der Anfang eines
sehr schwachen Plans, der Schwarz eine Menge Zeit kostet. 18...Dc7 haette zur
vorhin empfohlenen Variante gefuehrt, waehrend 18...Dc8 19.Kh2 Db7 20.a4 Teb8
in der Partie Knezevic-Djuric, Paris Open 1995, gespielt wurde und zum Remis
fuehrte. Wie wir sehen koennen, sieht der bevorzugte Plan ...Dc7 gefolgt von ..
.Tec8 oder ...Teb8 vor.} (18... Qc8 19. Kh2 Qb7 20. a4 Reb8 21. a5 Rc8 22. b4
Rc7 23. Rac1 Re8 24. Bb1 Qc8 25. Red1 Kh8 26. Ba2 Kg8 27. Bb1 Qb8 28. Ba2 Rec8
29. Kg1 Be8 30. Bb1 Bd7 31. Ba2 Be8 32. Bb1 {
1/2-1/2 Knezevic,B-Djuric,S/Paris op 1995}) 19. a4 Nh4 {I do not believe that
Kasparov would have played like this against a strong human player. Of course,
in a cramped position it is desirable to exchange pieces, but Kasparov spends
far too much time arranging this exchange. The queen will be needed to defend
the queenside and returning to d8 will cost further tempi. Perhaps the first
game led Kasparov to believe that the computer would not undertake direct
aggressive action, but this time Deep Blue pursue its aims with admirable
directness. Ich glaube nicht, dass Kasparov das gegen einen starken
menschlichen Gegner gespielt haette. Natuerlich ist es wuenschenwert, in einer
beengten Stellung Figuren abzutauschen, aber Schwarz verschwendet zuviel Zeit
mit der Vorbereitung des Abtauschs. Die Dame wird benoetigt, um den
Damenfluegel zu verteidigen, und die Rueckkehr nach d8 wird weitere Tempi
kosten. Vielleicht hat Kasparov aus der ersten Partie geschlossen, dass der
Computer keine direkten aggressiven Aktivitaeten entfalten wuerde, aber
diesmal verfolgt Deep Blue seine Ziele mit bewundernswerter Geradlinigkeit.}
20. Nxh4 Qxh4 21. Qe2 $1 {The threat is 22 Bd3, forcing Black to either commit
his b5-pawn or concede the a-file. The queen has to return. Die Drohung ist 22.
Ld3, was Schwarz zwingt, seinen b5-Bauern festzulegen oder die a-Linie
aufzugeben. Die Dame muss zurueck.} 21... Qd8 ({After Nach} 21... bxa4 {
White can retain the advantage either by behaelt Weiss sowohl mit} 22. bxa4 (
22. b4 cxb4 23. cxb4 Bb5 24. Nf5 (24. Qd1) 24... Bxe2 25. Nxh4 Bb5 {
or als auch mit}) 22... Reb8 23. Bd3 {die Oberhand.}) 22. b4 Qc7 23. Rec1 c4 $6
{Exactly what Black is trying to avoid in this line - playing ....c4 while
White still has the possibility of opening the a-file. Das ist genau das, was
Schwarz in dieser Variante zu vermeiden trachtet: ....c4 zu spielen, waehrend
Weiss noch die Moeglichkeit hat, die a-Linie zu oeffnen.} ({
It is true that Es ist richtig, dass} 23... Be7 24. c4 {is very dangerous for
Black, sehr gefaehrlich fuer Schwarz sein kann, aber ich glaube, dass}) ({
but I think it would have been better to play} 23... Qb7 {White has a slight
advantage after die bessere Wahl gewesen waere. Weiss hat nach} 24. f4 exf4 25.
Bxf4 Nf6 {but less than in the game. einen leichten Vorteil, aber weniger als
in der Partie.}) 24. Ra3 Rec8 25. Rca1 Qd8 26. f4 $1 {A stunning move played
by a computer. Human beings know very well that opening a second front against
a position under pressure can often cause it to collapse completely, but for a
computer to find this idea is exceptional. None of the home computer programs
I tested found this move at a tournament time-limit. Ein atemberaubender Zug,
gespielt von einem Computer. Wir Menschen wissen, dass, wenn der Gegner unter
Druck steht, man durch das Oeffnen einer zweiten Front den Zusammenbruch
schnell herbeifuehren kann. Dass ein Computer das zu begreifen scheint, ist
aussergewoehnlich. Keines der Schachprogramme, die ich getestet habe, findet
diesen Zug in der Turnierbedenkzeit. Eine Alternative waere die Verdreifachung
auf der a-Linie, z.B.} ({
Another plausible plan is to triple on the a-file, for example} 26. Bd1 Be7 27.
Qa2 Bg5 28. Bxg5 Qxg5 29. axb5 Bxb5 30. Ba4 {White is better in this line, too,
but play could become a little murky after Auch hier steht Weiss besser, aber
nach} 30... Rab8 31. Bxb5 axb5 32. Ra6 Rd8 33. Nf5 g6 34. Nxd6 Qe7 {
koennte das Spiel sich etwas trueben.}) 26... Nf6 ({
The desperate Das verzweifelte} 26... exf4 27. Bxf4 g5 28. Be3 Bg7 {
leads nowhere after fuehrt nirgendwohin. Nach} 29. Bd4 {exchanging the active
bishop and leaving Black's kingside weakened. wird der aktive Laeufer
abgetauscht, und der schwarze Koenigsfluegel bleibt geschwaecht.}) 27. fxe5 {
An interesting decision. This opens up the f-file and creates a protected
passed pawn, but a diagonal is opened for this bishop on f8. However, this
latter factor is of little significance since the solid pawn chain c3-b4
effectively restricts the bishop's activity. Eine interessante Entscheidung.
Das oeffnet die f-Linie und schafft einen gedeckten Freibauern. Aber es
oeffnet sich gleichzeitig eine Diagonale fuer den Laeufer auf f8. Allerdings
ist letzteres weniger relevant, da die solide Bauernkette c3-b4 die Aktivitaet
des Laeufers effektiv einschraenkt.} 27... dxe5 28. Qf1 ({
It would have been slightly more accurate to play Es war etwas genauer, sofort
} 28. Qf2 {immediately. zu spielen.}) 28... Ne8 ({
Black could have set a trap by Schwarz konnte mit} 28... Bd6 {
, when the greedy eine Falle aufstellen, weil das gierige} 29. axb5 (29. Nf5 $1
Bxf5 30. Qxf5) 29... axb5 30. Rxa8 Rxa8 31. Rxa8 Qxa8 32. Bxh6 {
would have come to nothing after zu nichts fuehrt:} 32... Qa2 33. Bb1 Qb3 34.
Bd2 Bxb4 {. However, White could continue simply by 29 Nf5 Bxf5 30 Qxf5, with
a clear positional advantage. Allerdings konnte Weiss einfach mit 29.Sf5 Lxf5
30.Dxf5 klare positionelle Vorteile erlangen.}) 29. Qf2 Nd6 {The transfer of
the knight to d6 may appear to favour Black, but actually the knight is doing
nothing active and it can be put under pressure by Bc5 and Nf5. Meanwhile,
Black's problems on the a-file persist. The need to meet axb5 by ...axb5 (a 
piece recapture would leave the a6-pawn horribly weak) means that all Black's
major pieces are tied to the back rank, leaving him with few constructive
ideas. Die Ueberfuehrung des Springers nach d6 koennte gut fuer Schwarz
aussehen, aber in Wirklichkeit ist der Springer nicht aktiv und kann mit Lc5
und Sf5 unter Druck gesetzt werden. Gleichzeitig bleiben die schwarzen
Probleme auf der a-Linie erhalten. Die Notwendigkeit, axb5 mit ...axb5 zu
beantworten (nach Wiedernehmen mit einer Figur waere der a6-Bauer extrem
schwach), bedeutet, dass alle schwarzen Schwerfiguren an die hintere Reihe
gebunden sind und er sehr wenige konstruktive Ideen hat.} 30. Bb6 Qe8 31. R3a2
Be7 32. Bc5 Bf8 $2 {After this the position is just lost. Perhaps the last
chance was Hiernach ist die Stellung einfach verloren. Vielleicht war die
letzte Chance} (32... Qd8 {with the idea mit der Idee} 33. Nf5 Bxf5 34. exf5 a5
{and Black's position is at least showing a few signs of life. The tactical
justification for this line is , und die schwarze Stellung zeigt zumindest
einige Lebenszeichen. Die taktische Rechtfertigung ist} 35. Bb6 Bh4 $1 {
and White has nothing clear-cut. , wonach es fuer Weiss keine klaren Zielegibt.
}) 33. Nf5 Bxf5 34. exf5 f6 {The only way to prevent White making further
inroads on the kingside by f6, but now Deep Blue comes up with a deceptively
simple solution. Nur so kann man Weiss daran hindern, weitere Einbrueche am
Koenigsfluegel mit f6 zu erzielen. Aber nun wartet Deep Blue mit einer
taeuschend einfachen Loesung auf.} 35. Bxd6 $1 Bxd6 36. axb5 $1 ({
It would be wrong to play Falsch waere} 36. Qb6 Rd8 (36... Bc7 $2 37. Qe6+ Kh7
38. Qxe8 {wins gewinnt}) 37. axb5 Rab8 38. Qxa6 e4 {when, at the cost of two
pawns, Black has developed considerable counterplay based on ...Qe5 and
possibly ...e3. However, this is again a remarkable move by Deep Blue; most
computers (including Fritz and Hiarcs) go for the material without hesitation.
Did Deep Blue reject this line based on very deep analysis, is there some
subtle programming involved? Fuer zwei Bauern haette Schwarz danach
erhebliches Gegenspiel, das auf ...De5 und moeglicherweise ...e3 beruht. Aber
wieder findet Deep Blue einen hoechst bemerkenswerten Zug. Die meisten
Programme, z.B. Fritz und Hiarcs, nehmen ohne Zoegern das Material. Hat Deep
Blue die Variante auf Grund einer sehr tiefen Berechnung oder mit Hilfe von
sehr subtilen positionellen Bewertungskriterien abgelehnt?}) 36... axb5 37. Be4
{A cruel move. Black's only chance of counterplay is to activate his bishop by
...e4, but Deep Blue cuts the rope which might have saved the drowning
Kasparov. Ein grausamer Zug. Die einzige Chance fuer Schwarz, Gegenspiel zu
bekommen, waere, seinen Laeufer durch ...e4 zu aktivieren. Aber Deep Blue
durchtrennt das einzige Seil, das den ertrinkenden Kasparov retten konnte.}
37... Rxa2 38. Qxa2 {This position is just lost. Black's bishop must stay on
d6 to block the d5-pawn, but Black cannot both maintain this bishop and defend
the weak pawn on b5. Black's total lack of counterplay is the deciding factor:
White has plenty of time to slowly infiltrate with his queen and rook. Die
Stellung ist verloren. Der schwarze Laeufer muss auf d6 bleiben, um den
d5-Bauern zu blockieren, aber Schwarz kann nicht den Laeufer dort behalten und
gleichzeitig den schwachen Bauern auf b5 verteidigen. Das vollstaendige Fehlen
jeden Gegenspiels ist entscheidend. Weiss hat viel Zeit, mit Dame und Turm die
schwarze Stellung zu infiltrieren.} 38... Qd7 39. Qa7 Rc7 ({Or Oder} 39...
Qxa7+ 40. Rxa7 Rd8 41. Ra5 Rb8 42. Ra6 Rd8 43. Rb6 {
and the first pawn falls. und der erste Bauer faellt.}) 40. Qb6 Rb7 41. Ra8+
Kf7 42. Qa6 Qc7 43. Qc6 Qb6+ 44. Kf1 $2 (44. Kh1 $1 Rb8 45. Ra6 Qe3 (45... Qf2
46. Qxd6 Re8 47. Ra1) 46. Qxd6 Re8 47. Ra1 Qxe4 48. Ra7+ Kg8 49. Qd7 $18) 44...
Rb8 45. Ra6 {Ergebnispatzer} (45. Ra6 Qe3 $1 46. Qxd6 Re8 47. h4 h5 (47... Re7
48. Bf3 Qc1+ 49. Kf2 Qd2+ 50. Kg3 Qe1+ 51. Kg4 h5+ 52. Kxh5 Qg3 53. Qe6+ Rxe6
54. dxe6+ Kg8 55. Ra8+ Kh7 56. Rh8+ Kxh8 57. e7 Kh7 58. e8=Q $18) 48. Bf3 Qc1+
49. Kf2 Qd2+ 50. Be2 Qf4+ $11) 45... h5 1-0

[Event "New York man vs machine"]
[Site "New York"]
[Date "1997.05.06"]
[Round "3"]
[White "Kasparov, Gary"]
[Black "Comp Deep Blue"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2785"]
[Annotator "Nunn"]
[PlyCount "95"]
[EventDate "1997.05.03"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. d3 {An overt anti-computer measure by Kasparov, aiming to take the machine
out of its opening book as quickly as possible.} 1... e5 2. Nf3 Nc6 3. c4 Nf6
4. a3 {The game was heading for a more or less normal English Opening, so
Kasparov once again steers the game into original channels.} 4... d6 5. Nc3 Be7
{This position has occurred quite a few times, and the most popular response
has been} (5... Nd4 6. Nd2 {and now:} 6... c6 (6... Bg4 7. b4 Be7 8. h3 Bh5 9.
Qa4+ c6 (9... Qd7 {9...Qd7 is safe and equal.} 10. Qxd7+ Nxd7 11. Ra2 c6 12. e3
Ne6 13. Be2 $10) 10. e3 Ne6 11. Bb2 O-O 12. Be2 d5 13. Bxh5 Nxh5 14. Qd1 d4 (
14... Nf6 $13) 15. Qxh5 (15. exd4 Nhf4 $1 $17) 15... dxc3 16. Bxc3 Qxd3 17. Rc1
(17. Bxe5 $2 f6 18. Bb2 Qc2 19. Rb1 Rad8 20. Qe2 Rxd2 $19) 17... Nd4 $2 (17...
Rad8 18. Qe2 f6 19. Qxd3 Rxd3 20. Ke2 $10) 18. exd4 exd4 19. Bb2 Rfe8 20. Kd1
a5 21. Qe2 $1 Qxe2+ (21... Qf5 22. Re1 $18) 22. Kxe2 axb4 23. axb4 d3+ (23...
Bxb4+ 24. Kd3 $18) 24. Kf3 Bg5 25. Bc3 Re2 26. Ra1 $1 Rae8 27. Rhd1 h5 28. Nf1
Rd8 29. Bd2 Bf6 30. Ra3 Re5 31. Bf4 {1-0 Chernin,A-Morozevich,A/Podolsk 1993})
7. g3 h5 8. h3 d5 9. Bg2 a6 10. e3 Ne6 11. cxd5 cxd5 12. Nf3 Bd6 $13 13. O-O h4
14. g4 e4 15. dxe4 dxe4 16. Nd2 Ng5 17. Ndxe4 Nfxe4 18. Nxe4 Nxe4 19. Qa4+ Kf8
20. Qxe4 f5 21. gxf5 Qf6 22. Rd1 Rh6 23. Qd4 {1-0 Panno,O-Bronstein,L/ARG-ch
1989   Both these games ended in White wins, although this had nothing to do
with the opening. It is not surprising that Black has relatively few problems
equalising after an innocuous move such as a3.}) (5... g6 {is another sensible
response. The system adopted by Deep Blue looks a little passive since the
bishop is not well placed on e7.}) 6. g3 O-O 7. Bg2 Be6 8. O-O Qd7 {
Deep Blue intends to exchange bishops with ...Bh3.} 9. Ng5 {Surprisingly, this
position has occurred in a game between two leading grandmasters:} (9. Bg5 Nd4
10. Nd2 Bh3 11. e3 Bxg2 12. Kxg2 Ne6 13. Bxf6 Bxf6 14. Nde4 Bd8 15. f4 f5 16.
Nf2 c6 $11 {1/2-1/2 Kortschnoj,V-Adams,M/Moscow PCA 1994 (39)   Kasparov
adopts a different line, avoiding the bishop exchange at the cost of
misplacing his knight.}) 9... Bf5 10. e4 Bg4 11. f3 Bh5 12. Nh3 {It is very
d for White to achieve anything while his knight occupies a vulnerable
position on g5, for example after} (12. Bh3 Qd8 13. g4 Bg6 14. f4 exf4 15. Bxf4
Ne5 {both g4 and g5 are exposed to attack and White's whole build-up looks
rather shaky.}) ({The immediate} 12. g4 Bg6 {
is no better; White cannot play 13 f4 because his g4-pawn is hanging.}) 12...
Nd4 13. Nf2 h6 14. Be3 {Threatening 15 Bxd4 exd4 16 Ne2, followed by g4 and f4,
completely shutting Black's light-squared bishop out of the game.} 14... c5 {
The general opinion expressed by other commentators has been that this
position clearly favours White, but in my opinion White only has a slight edge.
True, Deep Blue has played the opening in a way which appears very odd to
human eyes, because it doesn't fit any of the normal patterns for playing with
Black against the English Opening. Ideally, White would like to set his
kingside pawns in motion, but it isn't easy to achieve this. The f-pawn is
pinned, and White cannot unpin it by moving his queen, because then f3 would
be hanging. Moreover, there is no attractive square to put the queen(ironically
, the move a2-a3 cuts out a possible Qd2). Of course, White could play 15 g4
Bg6 16 f4, but then 16...exf4 17 Bxf4 Rae8 is fine for Black; he intends ...b5
and the f2-knight is badly placed. White wants to play f4 without g4, so as to
meet ...exf4 by gxf4. The manoeuvre which Kasparov plays later in the game
(involving Bh3) is not possible here because 15 Bh3 loses a pawn to 15...Bxf3.
  Therefore Kasparov gives up any immediate idea of kingside expansion, and
opens a second front on the queenside.} 15. b4 (15. Bh3 $2 Bxf3) (15. g4 $6 Bg6
16. f4 exf4 17. Bxf4 Rae8) 15... b6 16. Rb1 Kh8 {The computer cannot find a
constructive plan. A human might have played 16...Rab8, preparing for the
possible opening of the b-file.} 17. Rb2 ({Once again} 17. Bh3 {
is doubtful, because of} 17... Bxf3 18. Bxd7 Bxd1 19. Rbxd1 Nxd7 20. Bxd4 cxd4
21. Nd5 {and White has little to show for the pawn.}) 17... a6 {Deep Blue shows
signs of life; this looks as if it intends ...b5, opening up the queenside
completely, so Kasparov decides to pre-empt this by taking action himself.} 18.
bxc5 ({White would undoubtedly have preferred to play the immediate} 18. Bh3 {
, but after} 18... Bxf3 19. Bxd7 Bxd1 20. Nfxd1 Nxd7 21. bxc5 dxc5 {
Black can keep the b-file closed, when White does not have enough for the pawn.
}) 18... bxc5 19. Bh3 {
Now this is possible, because the tactics work in White's favour.} 19... Qc7 {
Deep Blue simply moves the queen but, thanks to the (necessary) preliminary
exchange on c5, the queen has a route to the active square a5.} (19... Nxf3+ $2
20. Kh1 {followed by g4, and Black loses material}) (19... Bxf3 20. Bxd7 Bxd1
21. Nfxd1 Nxd7 22. Rb7 Rad8 23. Ra7 {
and White regains the pawn with an endgame advantage. One possible line runs}
23... Bg5 24. Rxa6 Bxe3+ 25. Nxe3 Ra8 26. Rxa8 Rxa8 27. Rxf7 Rxa3 28. Ncd5 Ra7
29. Nf5 Nxf5 30. exf5 Kg8 31. Re7 Kf8 32. Re6 {and Black is under pressure.})
20. Bg4 {This is point of White's last move. The pressure on f3 is relieved.}
20... Bg6 ({After either} 20... Nxg4 21. fxg4 Bg6 22. Nd5 {or}) (20... Bxg4 21.
Nxg4 {the f6-knight is eliminated and White well on the way to a position with
a knight on d5 against Black's bad dark-squared bishop.}) 21. f4 exf4 22. gxf4
Qa5 {A key moment. White has achieved his strategic ambitions on the kingside,
but at the cost of allowing annoying counterplay on the queenside.} 23. Bd2 {
It is understandable that Kasparov does not want to retreat his knight to b1,
but the only alternative is to sacrifice a pawn. In return, White obtains
considerable positional pressure, but is only enough to balance the pawn
deficit.} 23... Qxa3 24. Ra2 {A surprising decision. Kasparov forces the
exchange of queens. 24 Rb7 looks much more combative. After 24...Nxg4 25 Qxg4
Bf6 26 Nd5 Qa2 White can try either 27 Rd1 Bh4 28 f5 or 27 Be3 Qe2 28 Qxe2
Nxe2+ 29 Kg2, with an unclear position in both cases. Black still has an extra
pawn, but his light-squared bishop is dismally placed.} (24. Rb7 {
looks much more combative. After} 24... Nxg4 25. Qxg4 Bf6 26. Nd5 Qa2 {
White can try either} 27. Be3 (27. Rd1 Bh4 28. f5 {or}) 27... Qe2 28. Qxe2
Nxe2+ 29. Kg2 {with an unclear position in both cases. Black still has an
extra pawn, but his light-squared bishop is dismally placed.}) 24... Qb3 25. f5
Qxd1 26. Bxd1 Bh7 {Better than} (26... Bh5 27. Bxh5 Nxh5 28. Nd5 Bg5 29. Bxg5
hxg5 30. Rfa1 {
, when White regains his pawn with some advantage, because the d6-pawn is weak.
}) 27. Nh3 Rfb8 28. Nf4 Bd8 29. Nfd5 {
Intending Bf4; Deep Blue takes steps to shield the d6-pawn.} 29... Nc6 30. Bf4
Ne5 31. Ba4 Nxd5 32. Nxd5 a5 33. Bb5 Ra7 {The outlines of a draw are already
visible. The active knight on d5 and Black's bishop on h7 provide sufficient
compensation for the pawn, but there are no real weaknesses in Black's
position so White cannot make progress.} 34. Kg2 g5 $1 {Perhaps Kasparov
imagined that he could manoeuvre very slowly, for example playing his king to
e2, and continuing with Rfa1 and Bd2, to put pressure and perhaps win the
a-pawn. Black could have defended passively by ...f6 and ...Bg8-f7, but this
blocks in the d8-bishop and creates a backward g-pawn. However, Deep Blue very
correctly takes action itself.} 35. Bxe5+ {There is nothing better, for example
} (35. fxg6 Bxg6 36. Bxh6 Nxd3 {is fine for Black.}) ({White could play} 35.
Bg3 {but then Black has a pleasant choice; either to play ...f6 and ...Bg8-f7,
having improved the position of his g-pawn, or to play ...h5 with a possible ..
.g4 and ...Bg5 to come.} 35... h5) 35... dxe5 36. f6 Bg6 37. h4 gxh4 38. Kh3
Kg8 39. Kxh4 Kh7 40. Kg4 Bc7 {If Black simply waits, then White could
eventually attack on the kingside, for example} (40... Rbb7 41. Rh1 Rb8 42. Ba4
(42. Rah2 h5+ 43. Kg5 a4 44. Rxh5+ Bxh5 45. Rxh5+ Kg8 46. Kf5 a3 47. Rg5+ Kf8
48. Rh5 {and}) (42. Rxh6+ Kxh6 43. Rh2+ Bh5+ 44. Rxh5+ Kg6 {are drawn.}) 42...
Rbb7 $2 (42... Rab7 {is still OK}) 43. Rah2 h5+ 44. Kg5 Kg8 45. Bd1 Rb1 46.
Bxh5 Rxh1 47. Rxh1 Bxh5 48. Rxh5 a4 49. Rh2 {followed by Kf5, and Black is in
trouble.  The move played clears the back rank in case a black rook is needed
on the kingside.}) 41. Nxc7 {Acceding to the draw.} ({After} 41. Rh1 {Not}
41... Raa8 $2 (41... Rg8 42. Kf3 Bd6 43. Rah2 h5 44. Ba4 Kh6 45. Bd1 Rb8 46.
Ke3 Rb1 47. Nc3) ({the simplest line is} 41... h5+ 42. Kf3 (42. Kg5 Rg8) 42...
Bd6 43. Ba4 Kh6 44. Rah2 Rab7 {with ...Rb2 or ...Rb1 to come, and White has no
time to step up the pressure on h5.}) 42. Rxh6+ Kxh6 43. Rh2+ Bh5+ 44. Rxh5+
Kg6 45. Bd7 {and mates}) 41... Rxc7 42. Rxa5 Rd8 43. Rf3 Kh8 {
This position is just drawn. Neither side can make any real progress.} 44. Kh4
Kg8 45. Ra3 Kh8 46. Ra6 Kh7 47. Ra3 {
It would be nice to transfer the bishop to d5,} ({but} 47. Bc6 {is met by}
47... Rd6) 47... Kh8 48. Ra6 1/2-1/2

[Event "New York man vs machine"]
[Site "New York"]
[Date "1997.??.??"]
[Round "4"]
[White "Comp Deep Blue"]
[Black "Kasparov, Gary"]
[Result "1/2-1/2"]
[ECO "B07"]
[BlackElo "2785"]
[Annotator "Nunn"]
[PlyCount "111"]
[EventDate "1997.05.03"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. e4 c6 2. d4 d6 {Kasparov sticks to his anti-computer opening strategy.} 3.
Nf3 {After this the game transposes to a type of Pirc. More aggressive
responses are 3 c4, which might lead to a sort of King's Indian, or 3 f4.} 3...
Nf6 4. Nc3 Bg4 5. h3 Bh5 6. Bd3 {A slightly passive set-up; it isn't obvious
exactly what the bishop is doing on d3. A more dynamic build-up would involve
g4, Qe2 and Bg2.} 6... e6 7. Qe2 d5 {Black's opening strategy is now clesr.
His light-squared bishop has ben developed outside the pawn chain and will
sooner or later be exchnaged off. Black then erects a light-squared barricade
in the centre, so that if the centre becomes blocked then he will be left with
his 'good' bishop. The cost is the tempo wasted in playing ...d6 and then ...
d5. However, in the relatively closed positions which result, this tempo is
not of great significance.} 8. Bg5 {
This appears to be a new move. Hitherto, White has tried} (8. exd5 Bxf3 9. Qxf3
cxd5 10. O-O Nc6 11. Ne2 Be7 12. c3 O-O 13. Bf4 a6 14. Ng3 b5 $11 {1-0 Chernysh
ov,K-Maiwald,J/Dresden op 1995 (39) with equality, Chernyshov-Maiwald, Dresden
Open 1995. The position resulting from the exchange on d5 closely resemble the
line 3 exd5 cxd5 4 Bd3 in the Caro-Kann.}) 8... Be7 9. e5 ({Not} 9. O-O $2 {
which runs into} 9... Nxe4 10. Bxe7 Nxc3 11. Qe5 Qxe7 12. Qxg7 Qf8 13. Qxf8+
Rxf8 14. bxc3 Bxf3 15. gxf3 {is strategically winning for Black.}) 9... Nfd7 ({
If Black wanted to make sure that his h5-bishop was exchnaged for a knight
rather than a bishop, he could haveplayed} 9... Bxf3 10. Qxf3 Nfd7 11. Bxe7
Qxe7 {but the problem is that the b8-knight is much harder to develop. Overall,
the move played in the game appears most accurate.}) 10. Bxe7 Qxe7 11. g4 Bg6
12. Bxg6 {This looks slightly odd to human eyes, because the h8-rook is
activated against the backward pawn on h3. It appears more natural to play
0-0-0, then aim to move the knight from f3 and play f4-f5.} 12... hxg6 13. h4 {
However, Deep Blue shows that the exchnage on g6 did have a point. If Black
plays a later ...f6, then White can reply exf6, gxf6; g5, undermining Black's
control of e5. WE shall see this idea again later.} 13... Na6 14. O-O-O O-O-O
15. Rdg1 {Preparing for kingisde activity by h5.} 15... Nc7 {A fundamental
decision, over which garry thought for a long tiem. Black has two alternative
plans: the first is to support the e6-square and then play ...f6. White's
likely response is to swap on f6, and then Black can try to play ...e5. If he
succeeds in this plan, Black will have a majority of pawns in the centre.  The
second plan is to attempt a queenside attack. If he were to go for this plan,
Black would play 15...Nb6, with the idea of ...Nc4 and ...Qb4 to come. In this
case the knight shouild stay on a6 as it might be able to partciipate directly
in the attack from this square. The choice in the game shows that Garry has
definitely decided for the first plan.} 16. Kb1 ({The point of this move is
not entirely clear - it even looks like a lazy human move, just tucking the
king out of harm's way so as to avoid overlooking a possible check later!} 16.
h5 gxh5 17. gxh5 {is more ambitious as the tactical idea} 17... f6 18. Nh4 fxe5
19. Ng6 Qb4 20. Nxh8 exd4 21. a3 Qa5 {appears good for White after} 22. Nf7)
16... f6 {Challenging White's central control.} 17. exf6 Qxf6 $1 {An excellent
and combative move. The obvious continuation was 17...gxf6, but then White
could reply 18 g5 eliminating the f6-pawn and thereby preventing Black from
playing ...e5. The result would be a general opening up of the kingisde, when
White's rooks appear well-placed on h1 and g1. The move played leaves Black
with doubled and isolated pawns, supposedly the chess-player's worst nightmare.
However, White also has serious structural weaknesses; the pawns on g4 and h4
aren't doing much and, even more seriously, his f3-knight and f2-pawn are
vulnerable to pressure down the f-file.} 18. Rg3 {Deep Blue takes steps to
defend the exposed knight, but the rook is clumsily placed here.} 18... Rde8 {
Threatening to break through in the centre by ...e5. This would give Black a
clear advantage so Deep Blue immediately prevents it.} 19. Re1 Rhf8 {Very natur
al play. The f3-knight is immobilised by the pressure along the f-file, since
the f2-pawn is insufficiently defended. Garry has excellent compensation for
his slight kingisde pawn weaknesses in the form of active piece-play - just
the type of situation in which he normally plays very well.} 20. Nd1 $1 {
Deep Blue finds an excellent counter to Black's plan. Although this looks
passive, the knight wasn;t doing much on c3 and it is much more usefully
employed defending the f2-pawn. This frees the f3-knight for action; in some
lines White might be able to play Ne5.} 20... e5 $5 {An amazing pawn sacrifice.
The logic behind this is that there are only two things wrong with Black's
posiiton: the backward e6-pawn and the poorly plaved kngith on c7, which has
few active prospcets (the g-pawns are not a significant factor provided
Black's pieceds remain active, as White will not have the freedom of action to
exploit them). By giving up a pawn, Black solves both these problems at a
stroke. The c7-knight can move to e6, and then either to f4 or to c5 and then
e4.  It is certainly a bold stroke to offer a pawn against a computer, as
machines (like Kortschnoj) have the annoying habit of hanging on to material.
Very good judgement by Kasparov!} ({
Another factor is that an alternative plan is hard to find.} 20... Qf4 {
is met, not by} 21. Ne5 $2 Nxe5 22. Qxe5 Qxe5 23. Rxe5 Rf4 24. c3 Rh8 {
with strong pressure against White's pawns, but by 21 Qd3 and g6 is hard to
defend.}) ({Attempting to activate the c7-knight by} 20... Nb5 21. c3 Nd6 {
fails to} 22. Ng5 {with Rf3 to come.}) 21. dxe5 ({After} 21. Nxe5 Qxh4 {
Black has no problems.}) 21... Qf4 22. a3 $2 {An extremely odd move which has
no visible purpose, other than the general one of avoiidng potential back-rank
problems.} ({Neither} 22. Qd3 Nxe5 {nor}) (22. h5 gxh5 23. gxh5 Rh8 24. Rxg7
Rxh5 {is promising for White}) ({so the best move is probably} 22. Qe3 $1 Qxe3
23. Rxe3 Ne6) 22... Ne6 {
Kasparov gratefull seizes on the free tempo to progress with his plan.} 23. Nc3
{Deep Blue appears is floundering. This move undoes all the good work that the
earlier Nd1 had achieved. 23.Qe3 was still the best move. If White were a
human being, one would say that he had 'lost the thead'. It seems odd that
computers can have the same problem.} 23... Ndc5 24. b4 $2 {A very ugly move.
This was clearly the point of White'sprevious move: to be able to expel the
knight from c5 without it landing on e4. However, the time White gains is as
nothing compared to the serious weakening of his king position. Kasparov must
have been mentally rubbing his hands with glee at the sight of this reckless
advance.} 24... Nd7 25. Qd3 Qf7 26. b5 {Having played b4 to keep the knights
out of c5, it is of course inconsistent to let them back in again. Now White
has nothing positive to show for the advance of his b-pawn, while his king
position becomes weaker and weaker. White should have just remained passive,
although Black has various ways of improving his position, for example by ...
Kb8 and ...Rc8, aiming for ...c5.} (26. Nd1 Kb8) 26... Ndc5 27. Qe3 Qf4 {
White's collection of pawn weaknesses is now so serious that Black feels no
hesitation is swapping off queens into an ending a pawn down! His aim is to
reach a spotion with doubled rooks on f4 and f8, when White's whole position
will be ceaking at the seams.} 28. bxc6 bxc6 29. Rd1 {
Deep Blue struggles to maintain control. This move prepares Nd4 in some lines.}
29... Kc7 {Allowing the rooks to switch to the b-file.} 30. Ka1 Qxe3 {
A surprising decision, but after considerable analysis I think it is correct.
Here Black had the opportunity to play for a direct attack against the white
king, which Kasparov might not have tunred down against a human opponent.} ({
However, with accurate defence the upshot is far from clear} 30... Rb8 31. Rb1
Rxb1+ 32. Kxb1 Rb8+ 33. Kc1 Qc4 34. Nd2 Qa6 35. Ne2 {also achieves little}) (
30... Qc4 31. Nd2 (31. Nd4 $1 Nxd4 (31... Rb8 32. Nxe6+ Nxe6 33. Qxa7+ Rb7 34.
Qa5+ {looks good for White}) 32. Rxd4 Qf1+ 33. Nd1 {
and there is obvious continuation for Black.}) 31... Qa6 {
really is dangerous for White}) 31. fxe3 Rf7 {Doubling rooks will force the
f3-knight to move, an then Black's rooks cen penetrate to f2.} 32. Rh3 {
Another odd move from Deep Blue. Up to now we could say that Black had a
slight advantage, but now White is in deep trouble.} (32. Nd4 Ref8 33. Nxe6+
Nxe6 {looks better, although Black also has some advantage in this case.})
32... Ref8 33. Nd4 Rf2 34. Rb1 Rg2 35. Nce2 {Deep Blue decides to hettison the
extra pawn, but there were by now no good alternatives.} (35. g5 Rff2) 35...
Rxg4 ({It is also tempting to play for the attack by} 35... Rff2 36. Nxe6+ Nxe6
37. Nd4 Nxd4 38. exd4 Rxc2 39. Rf1 c5 40. dxc5 Kc6 41. Re1 Kxc5 {, which also
strongly favours Black, but there is no reason to criticise the game
continuation.}) 36. Nxe6+ Nxe6 {All White's remaining pawns are isolated, and
Black's pieces are all more active than their White counterparts. With all
these advantages, it is incredible that Kasparov failed to win this position.}
37. Nd4 {Another pawn bites the dust, but this is a reasonable decsiion,
because the knight on e6 was exrteremely well-placed and White could hardly
avoid shedding one of the weak e-pawns in any case.} 37... Nxd4 38. exd4 Rxd4
39. Rg1 Rc4 40. Rxg6 Rxc2 41. Rxg7+ Kb6 42. Rb3+ Kc5 43. Rxa7 {White is once
again a pawn up, but his three scattered pawns are far less dangerous than
Black's two connected passed pawns. Moreover, Black'sking is activ e wherea
White's is trapped on the back rank and subjected to mating threats from the
enemy rooks. The position should be winning for Black.} 43... Rf1+ $2 {
This move effectively loses a vital tempo. The somplest win was by} (43... Kc4
44. Rab7 c5 45. Rb2 (45. e6 Re2) 45... Rxb2 46. Rxb2 d4 47. e6 (47. Rc2+ Kb3
48. Kb1 d3) 47... d3 48. Rg2 Kc3 {and Black's pawns are too strong.}) 44. Rb1
Rff2 45. Rb4 {Had Kasparov overlooked that this move threatens mate in one? If
Black wants to play for a win then he is more or less forced to swap one pair
of rooks, but this relieves much of the pressure against White's king.} 45...
Rc1+ 46. Rb1 Rcc2 47. Rb4 Rc1+ 48. Rb1 Rxb1+ {Black is eventually forced to
exchnage rooks, but in comparison with the note to Black's 43rd move, his king
and pawns are further back. The position should probably still be a win, but
it is now more trickly.} 49. Kxb1 Re2 50. Re7 Rh2 51. Rh7 Kc4 $2 ({
Now the game appears to be a draw. The correct move was} 51... d4 $1 {After}
52. Rc7 (52. e6 Re2 53. e7 Kc4 54. a4 d3 55. a5 Re1+ 56. Kb2 d2 {wins}) 52...
Rxh4 53. e6 Re4 54. e7 Kd6 {the point is revealed: White loses his e-pawn.})
52. Rc7 $1 {Deep Blue seizes the drawing chance. First of all, the rook is
transferred behind the black pawns with gain of tempo. This is necessary,
because it is of no value to push e6-e7 while the rook is stuck on h7 - the
rook must be available to restrain Black's pawns from behind,} 52... c5 53. e6
Rxh4 54. e7 Re4 55. a4 {This is the second point. Black no longer has the move
...Kd6 available, so White keeps his e-pawn.} 55... Kb3 {The position is just
drawn. With the rook actively placed on c7, Black can only advance his pawns
very slowly, too slowly to beat White's a-pawn to the queening square.} (55...
Kb4 56. a5) (55... d4 56. a5 d3 57. a6) 56. Kc1 1/2-1/2

[Event "New York man vs machine"]
[Site "New York"]
[Date "1997.??.??"]
[Round "5"]
[White "Kasparov, Gary"]
[Black "Comp Deep Blue"]
[Result "1/2-1/2"]
[ECO "A07"]
[WhiteElo "2785"]
[Annotator "Nunn"]
[PlyCount "98"]
[EventDate "1997.05.03"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. Nf3 d5 2. g3 {Kasparov continues his policy of playing quiet flank openings.
} 2... Bg4 3. Bg2 Nd7 4. h3 Bxf3 {It is perhaps more common to play 4...Bh5.
The exchange on f3 concedes the two bishops at an early stage, but Black gains
time and this enables him to complete his development without difficulty.} 5.
Bxf3 c6 6. d3 e6 {Black's general strategy is clear: having given up his
light-squared bishop, he must use his central pawns to maintain some
light-squared control. This also avoids having his remaining bishop obstructed
by his own pawns.} 7. e4 $6 {White's general strategy is to play e4, which
serves two purposes. Firstly, it may help to break up Black's solid central
pawn structure, and secondly a later e4-e5 will gain space and may form the
basis of a kingside attack, should Black castle on that side of the board.
However, it is unusual for White to play e4 so quickly; the usual logic being
that e4 cannot be prevented, so White may as well play 0-0 and bring his king
into safety before taking action in the centre.} ({
For example, in the game Murshed-Rahman, Dhaka 1995, White continued} 7. Nd2
Bc5 8. Bg2 Ne7 9. e4 O-O 10. O-O a5 11. a4 Ba7 12. Kh1 Nc5 13. b3 {with a sligh
t edge for White (although the game actually ended in a quick draw).  It seems
to me that Kasparov's move is premature, and helps Black to develop the active
piece play he needs to offset White's two bishops.} 13... f5 14. exd5 Nxd5 15.
Bb2 Nd7 16. Nc4 Qg5 17. Qf3 f4 18. Rae1 {1/2-1/2 Murshed,N-Rahman,Z/Dhaka 1995}
) 7... Ne5 8. Bg2 dxe4 {Having a well-supported pawn on d5, it looks odd to
surrender this outpost by making a voluntary exchange on e4, but Deep Blue has
seen some specific tactical features of the position which justify this
slightly anti-positional exchange.} 9. Bxe4 {Already White feels some
inconvenience from having his king in the centre. The natural reply is} (9.
dxe4 Bb4+ $1 ({when} 9... Qxd1+ 10. Kxd1 O-O-O+ 11. Ke2 {gives White a
favourable ending because Black has nothing in return for the two bishops. The
problem is that Black plays 9...Bb4+}) 10. c3 (10. Nd2 Qa5 11. O-O O-O-O 12. c3
Be7 {is also awkward because White has been forced to weaken d3}) 10... Nd3+
11. Ke2 Nxc1+ 12. Qxc1 Bc5 {and the opposite-coloured bishops mean complete
equality. This is a good example of how Black can uses his lead in development
and active pieces to nullify White's theoretical long-term advantage.}) 9...
Nf6 10. Bg2 {At one time this type of structure was thought good for White.
However, the current popularity of the Scandinavian Defence (1 e4 d5) depends
on Black accepting precisely this type of position. The central structure d4 v
c6, e6 is very solid for Black. It is hard for White to open the position and
activate his two bishops. The current situation is more favourable for Black
than a typical Scandinavian position, first of all because White has yet to
advance his pawn to d4 and secondly because Black has a lead in development. I
do not believe that White has any advantage here.} 10... Bb4+ 11. Nd2 h5 {
A surprising move from a computer, but a good one. The computer puts its
finger on the slight weakness created by the move h3. This means that after a
later ...h4, White will be forced to either defend the g3-pawn or play g4, but
then the square f4 is accessible to Black's pieces, especially the knight on
g6. Some human players who like pushing their rook's pawns (Speelman, for
example) might also have played this move, but it is certainly interesting
that Deep Blue finds this quite sophisticated positional idea.} 12. Qe2 Qc7 13.
c3 Be7 {After} (13... Bd6 14. d4 Ng6 15. Nc4 h4 16. Nxd6+ Qxd6 {White even has
two bishops against two knights, but actually this also seems playable for
Black, for example} 17. Qf3 Nh5 {exerts uncomfortable pressure on g3.}) 14. d4
Ng6 15. h4 {Garry decides to halt the further advance of the h-pawn, but at
the cost of allowing an enemy knight to hop in to g4.} 15... e5 {Of course.
nks to Black's excellent development, Deep Blue can execute this freeing
advance at once. Normally, Black has to fight long and hard to liberate his
position in this manner.} 16. Nf3 exd4 17. Nxd4 O-O-O 18. Bg5 Ng4 19. O-O-O
Rhe8 {Black must not be greedy:} (19... Bxg5+ 20. hxg5 Qa5 {
, attacking a2 and g5, runs into} 21. Rxh5) 20. Qc2 Kb8 {The complete
liquidation of the central pawns presages further exchanges and a draw. White
still has the theoretical advantage of the two bishops, but one can hardly say
that the knight on g4 is any worse than a bishop.} 21. Kb1 Bxg5 22. hxg5 N6e5
23. Rhe1 {Not} (23. Rxh5 c5 24. Nb3 Rxd1+ 25. Qxd1 Nxf2 {
and Black, if anything, is better.}) 23... c5 24. Nf3 {Cautiously returning to
the kingside and defending the g5-pawn. The position is dead equal.} 24...
Rxd1+ 25. Rxd1 Nc4 {
This knight appears actively placed, but Kasparov finds a way to drive it back.
} 26. Qa4 Rd8 27. Re1 {White plays quietly, forcing the c4-knight to retreat.}
(27. Rxd8+ Qxd8 28. a3 {was an interesting alternative, for example} 28... Qd3+
29. Ka2 Qe2 30. Qb5 Qxf2 {not} (30... b6 $2 31. Ne5 Ngxe5 32. Qe8+ Kc7 33. Qe7+
Kc8 34. Bh3+ {and wins, but}) (30... a6 {is playable, when} 31. Qxb7+ Kxb7 32.
Ng1+ Kc7 33. Nxe2 Nxf2 34. Nf4 g6 35. Bf1 Ne3 36. Bxa6 Ne4 {
leads to an ending in which Black's passed h-pawn appears rather dangerous.})
31. Qe8+ Kc7 32. Qxf7+ Kd6 33. Qxc4 Qxg2 34. Qf4+ {
with perpetual check as the most likely outcome.}) 27... Nb6 28. Qc2 Qd6 29. c4
{The only defect in Black's position is the offside knight on b6, so Kasparov
takes steps to make sure that it stays inactive.} 29... Qg6 $2 {A very odd and
mistaken move. Deep Blue was probably attracted to it because it temporarily
wins a pawn, but White soon regains it and activates his pieces at the same
time. If Black wanted to exchange queens then} (29... Qd3 {
looks the best way to do it, for example} 30. Qxd3 Rxd3 31. Re8+ Kc7 32. Kc2
Rd8 {with an inevitable draw.}) ({It was also possible just to bring the
poorly placed knight back into play, for example} 29... Nc8 30. Bh3 Ne7 {
(heading for c6 and d4)} 31. Bxg4 hxg4 32. Ne5 {not
} (32. Nh2 $2 Nc6 33. Nxg4
Nb4 {and Black wins.}) 32... Qe6 33. Nd3 Qd6 {with a draw by repetition.}) 30.
Qxg6 fxg6 31. b3 Nxf2 32. Re6 {The best way to regain the pawn. After} (32. Nh4
Nd3 33. Rd1 Rd7 34. Nxg6 Ne5 35. Rxd7 Nbxd7 36. Nf4 g6 37. Be4 Nf8 {
Black defends everything.}) 32... Kc7 33. Rxg6 Rd7 34. Nh4 {Having been given
a chance by Deep Blue's poor 29th move, Kasparov now plays very well to make
the most of his slight advantage. Now he intends Nf5.} 34... Nc8 {
Meeting the threat, since 35 Nf5 can now be answered by 35...Ne7.} 35. Bd5 ({
Trying to win the h5-pawn by} 35. Bf3 {
leads to nothing. Black could simply play} 35... Ng4 {
or even give up the pawn to activate his knights by} (35... Nd6 36. Bxh5 Nfe4))
35... Nd6 {Not} (35... Ng4 36. Be6 Ne5 37. Bxd7 Nxg6 38. Nxg6 Kxd7 39. Nf4 {
and White wins a pawn, although in view of Black's more active king it is
doubtful if this would suffice to win the game.}) 36. Re6 Nb5 {Deep Blue forces
the exchange of White's dominant bishop (since White cannot allow a second
knight to jump into his position), but Kasparov retains the initiative.} 37.
cxb5 Rxd5 38. Rg6 Rd7 ({Not} 38... Ne4 39. Rxg7+ Kb6 40. g6 Rd2 41. Re7 {
and the g-pawn is too strong.}) 39. Nf5 Ne4 40. Nxg7 ({White has no time for} 
40. Kc1 {because of} 40... Rd5 41. Rxg7+ Kb6) 40... Rd1+ 41. Kc2 Rd2+ 42. Kc1
Rxa2 ({Not} 42... Rg2 43. Nxh5 {and the g3-pawn is defended with gain of tempo.
}) 43. Nxh5 Nd2 44. Nf4 {# It seems to me that the diagram position is
critical for the assessment of the ending. After the move played Deep Blue
manages to forced a draw by means of a surprising tactical manoeuvre. The
alternative was to play a rook move, delaying Nf4 in the hope of restricting
Black's options.} ({The idea is} 44. Rf6 Nxb3+ ({not} 44... Ne4 45. g6 Nxf6 46.
Nxf6 Rg2 47. Ne4 {and White wins}) 45. Kb1 Rh2 {
the point of playing the rook move first is that if Black plays} (45... Rd2 46.
g6 c4 {as in the game, White can reply} 47. Rf3 {
and White has an extra tempo through missing out Nf4, and so wins.} 47... Rd8
48. Rf7+ Kb6 49. g7) 46. Nf4 c4 47. g6 Kd7 $1 ({after} 47... Nd2+ 48. Kc1 Nb3+
49. Kd1 {White avoids the checks.}) 48. Nd5 Nd2+ 49. Ka2 $1 {it would take a
brave man to walk into this discovered check, but it is the only winning
attempt, and now:} 49... Ne4+ (49... Rg2 50. Rf7+ Ke8 (50... Kd6 51. Ne3) 51.
Rxb7 Ne4+ 52. Ka3 Rxg3+ 53. Kb4 Nd6 54. Nf6+ Kf8 55. Rd7 Rxg6 56. Rxd6 Ke7 57.
Rd7+ Kxf6 58. Rxa7 {leading to a winning ending of R+P v R.}) 50. Ka3 Rh3 (
50... Rg2 51. Rf3 Nxg3 52. Nf6+ Ke6 53. g7) 51. Rf3 Rh6 52. Re3 {and Black is
in trouble.  Perhaps Black has a draw somewhere in this analysis, but I think
44 Rf6 would have posed Deep Blue more problems than the move played.}) ({
Note that the similar idea} 44. Re6 {fails since after} 44... Nxb3+ 45. Kb1 Rh2
46. Nf4 c4 47. g6 c3 {
White cannot play Nd5+ and Nxc3 because his rook is hanging after ...Kd7.} {
Not does} 48. Re2 {promise anything, for example} 48... Rh1+ 49. Kc2 Nd4+ 50.
Kxc3 Nxe2+ 51. Nxe2 Rh5 {and Black is better.}) 44... Nxb3+ 45. Kb1 Rd2 {
On this square the rook prevents a later Nd5+.} 46. Re6 c4 47. Re3 {
White must take steps against the deadly threat of 47...c3.} ({After} 47. Re2
c3 (47... Rxe2 48. Nxe2 Kd6 49. Kc2 Nc5 50. g6 Ke6 51. Kc3 Kf6 52. Kxc4 Ne4 53.
Kd5 Nd2 54. Nf4 {may also draw, but is more tricky for Black}) 48. Rxd2 cxd2
49. Kc2 Kd6 50. g6 Ke7 51. Nd5+ Kf8 52. Ne3 Nd4+ 53. Kxd2 Kg7 {Black draws.})
47... Kb6 $1 {An excellent defensive idea. Black will lose if his rook has to
return to stop the g-pawn, but by bringing his king into the attack he just
manages to save the day. The question is: when did Deep Blue see this
resource?} 48. g6 Kxb5 49. g7 Kb4 (49... Kb4 {After 50 g8Q or 50 Nd3+ cxd3 51
g8Q, Black just gives perpetual check on d1 and d2, so the only winning try is}
50. Re2 Rd1+ 51. Kb2 c3+ 52. Kc2 Rc1+ 53. Kd3 Rd1+ {and now:} 54. Ke4 {
(for a long time I couldn't find a defence for Black after this, but there is
one) and now:} (54. Ke3 Rd8 55. Nd5+ Kc4 56. Nf6 Nd4 57. Rf2 ({not} 57. g8=Q+
Rxg8 58. Nxg8 Nxe2 59. Kxe2 Kb3 {and Black wins}) 57... c2 58. Kd2 Nf5+ 59. Kc1
Nxg7 60. Rxc2+ {followed by Rc7, with a draw.}) 54... Nc5+ $1 (54... Rd4+ 55.
Ke5 Rd8 56. Nd5+ Kc4 57. Re4+ (57. Nf6 Kd3 58. Rh2 c2) 57... Kc5 58. Nxc3 Nd2
59. Rg4 {and White wins.}) (54... Rd8 55. Nd5+ Kc4 56. Nf6 Nd2+ 57. Kf5 c2 58.
Rxd2 c1=Q 59. Rxd8 {and again White is winning.}) 55. Kf5 (55. Kf3 Rd8 56. Nd5+
Kb3 57. Re3 Kc4 58. Nxc3 Rg8 {and}) (55. Ke5 Rd8 56. Nd5+ Kc4 57. Nf6 Kd3 58.
Re1 Kd2 {favour Black}) 55... Rd8 56. Ng6 Rg8 57. Kf6 Kb3 {and again both
sides have to give their rook for the opposing passed pawn, leaving Black a
pawn up.  Since line 2c can only be better for Black, Kasparov's decision to
accede to the draw was entirely correct.}) 1/2-1/2

[Event "New York man vs machine"]
[Site "New York"]
[Date "1997.??.??"]
[Round "6"]
[White "Comp Deep Blue"]
[Black "Kasparov, Gary"]
[Result "1-0"]
[ECO "B17"]
[BlackElo "2785"]
[Annotator "Nunn"]
[PlyCount "37"]
[EventDate "1997.05.03"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]

1. e4 {Granda Zuniga} 1... c6 {As in game 4. Will Garry use the same hybrid
system again? Wie in Partie vier. Will Garry das gleiche Hybridsystem
wiederverwenden?} 2. d4 d5 {No: Garry switches openings and opts for a genuine
Caro-Kann. An opening less suited to Garry's playing style could hardly be
imagined, but at least he is very familiar with it, having had many clashes
with his old rival Karpov, albeit on the other side of the board. Nein, er
wechselt die Eroeffnung und waehlt eine echte Caro-Kann-Verteidigung. Eine
Eroeffnung, die weniger zum Kasparov-Stil passt, kann man sich kaum vorstellen.
Aber zumindest kennt er sie einigermassen gut, denn er hat sie in zahlreichen
Begegnungen mit seinem alten Rivalen Karpov gespielt - allerdings auf der
anderen Seite des Brettes!} 3. Nc3 dxe4 4. Nxe4 Nd7 5. Ng5 {Ironically, Deep
Blue uses the same system which Kasparov used to play himself against Karpov.
Eine Ironie des Schicksals, dass Deep Blue das gleiche System benutzt, das
Kasparov gegen Karpov anwandte.} 5... Ngf6 6. Bd3 e6 7. N1f3 h6 $2 {But Karpov
never played like this! This move forces White to sacrifice a piece, but the
resulting attack is so dangerous that there are almost no human players
willing to take Black's side. This line seems particularly inadvisable against
a computer: a wide-open position, tactical ideas on all sides and a vicious
attack for the silicon monster. 7...Bd6 is normal. So hat Karpov aber nie
gespielt! Dieser Zug zwingt Weiss, eine Figur zu opfern, der entstehende
Angriff ist aber so gefaehrlich, dass es kaum noch menschliche Spieler gibt,
die das mit Schwarz spielen. Die Variante ist besonders unangebracht in
Partien gegen den Computer. Sie ergibt voellig offene Stellungen mit vielen
taktischen Ideen und fuerchterlichen Angriffsmotiven - alles genau das Falsche
gegen ein Silikonmonster. 7...Ld6 ist normal.} 8. Nxe6 Qe7 $2 {After this
is just lost. The score in over-the-board play tells a grim story: 13/14 for
White. According to current theory, Black's last attempt to survive in this
line is 8...fxe6 9 Bg6+ Ke7 10 0-0 Qc7 11 Re1 Kd8. At the cost of losing a
tempo with his king, Black avoids having his queen stuck at e7, where she
blocks in the whole of Black's kingside. With the queen on c7, the bishop on
f8 can move and Black has somewhat more freedom. Having said that, White's
attack is still very dangerous, but it is by no means a forced win. Danach ist
Schwarz schlicht verloren. Die Statistik zeigt eine niederschmetternde Bilanz:
in 13 von 14 Partien hat Weiss gewonnen.} ({Nach der heutigen Theorie besteht
die letzte vernuenftige Chance fuer Schwarz in der Variante} 8... fxe6 $142 9.
Bg6+ Ke7 10. O-O Qc7 11. Re1 Kd8 {Schwarz verliert ein Tempo mit seinem Koenig,
dafuer ist die Dame nicht auf e7 gebunden, wo sie den ganzen schwarzen
Koenigsfluegel blockiert. Mit der Dame auf c7 kann der Laeufer auf f8 ziehen,
und Schwarz hat etwas mehr Freiheit. Der weisse Angriff ist immer noch
brandgefaehrlich, aber es gibt keinen erzwungenen Gewinn.} 12. c4 (12. Rxe6 Bd6
13. Re1 Nf8 14. Bd3 Bg4 $17) 12... Bb4 13. Re2 Nf8 14. Ne5 (14. Bc2 Bd6 15. g3
Qe7 $1 $17) 14... Nxg6 15. Nxg6 Re8 16. c5 Qf7 $1 $17 {
Granda Zuniga  Der chilenische GM haeltdie schwarzue Stellung fuer besser.} 17.
Ne5 Qh5 18. f3 (18. Nc4 b5 19. Ne5 Bd7 20. a4 bxa4 21. Rxa4 a5 22. f3 Re7 $17)
18... Ba5 19. g4 Qh3 20. Rg2 Bc7 21. Rg3 Qh4 22. Ng6 Bxg3 $1 23. Nxh4 Bxh4 $17
{Wolff,P-Granda Zuniga,J/New York Reshevsky 1992/CBM 31/[Granda Zuniga]}) 9.
O-O fxe6 10. Bg6+ Kd8 11. Bf4 b5 {A new move, but not one which will resurrect
this variation. A few examples should demonstrate the true horror of Black's
situation: Ein neuer Zug, aber nicht einer, der diese Variante wiederbeleben
duerfte. Die Idee ist, das Feld d5 fuer den Springer zu bekommen, der sonst
mit c2-c4 vertrieben werden konnte. Aber der Zug gibt Weiss Gelegenheit,
weitere Linien am Damenfluegel zu oeffnen und seinen a1-Turm a tempo ins Spiel
zu bringen. Ferner bleibt das Hauptproblem von Schwarz weiter bestehen: er
kann die Dame nicht bewegen. Das einzige Feld fuer sie ist b4, aber das laesst
nicht nur den e6-Bauern ohne Verteidigung, Weiss kann die Dame jagen und
dadurch sogar Zeit gewinnen.} (11... Ne8 12. Bg3 Nd6 13. Re1 Nf6 14. Bxd6 Qxd6
15. Ne5 Qd5 16. Nf7+ Kc7 17. Nxh8 Qg5 18. Qd3 Bd6 19. Nf7 Bxh2+ 20. Kxh2 Ng4+
21. Kg1 Qf6 22. Qg3+ e5 23. Nxe5 {1-0 Schott,R-Kirner,M/Eppingen HT2 1988}) (
11... Qb4 12. a3 Qb6 (12... Qxb2 13. Qe2 Nd5 14. Bd2 Bd6 15. Qxe6 Kc7 16. Rfb1
Qxa1 17. Rxa1 Ne5 18. Qxd6+ Kxd6 19. Nxe5 Kc7 20. c4 Ne7 21. Bf4 Rf8 22. Nf7+
Kd7 23. Bh5 b5 24. c5 Nf5 25. Ne5+ Ke6 26. Nxc6 Bb7 27. Re1+ Kf6 28. d5 g6 29.
Re6+ Kg7 30. Be5+ Kg8 31. Rxg6+ Kh7 32. g4 Bxc6 33. gxf5 Rxf5 34. Rg7+ Kh8 35.
Rg5+ Rxe5 36. Rxe5 Bd7 {1-0 Geller,E-Meduna,E/Sochi 1986}) 13. Qe2 Be7 14. c4
Rf8 15. Bg3 a5 16. Rfe1 c5 17. d5 e5 18. Nxe5 Nxe5 19. Qxe5 Ng8 20. Qxg7 Qf6
21. Qh7 Ra6 22. Re3 Bf5 23. Bxf5 Qxf5 24. Qxf5 Rxf5 25. Rae1 Kd7 26. f3 Bf6 27.
Rd3 Bxb2 28. Rb1 Rb6 29. Kf1 Rff6 30. d6 h5 31. Be5 Re6 32. Rxb2 Rxb2 33. Bxb2
Rxd6 34. Rxd6+ Kxd6 35. Ke2 Ne7 36. g4 {
Bengtsson,O-Henriksson,J/SVE-ch op Vaxjo 1992/1-0 (46)}) (11... Nd5 12. Bg3 Qb4
13. Re1 (13. Qe2 Be7 14. c4 N5b6 15. b3 Bf6 16. Rad1 Qe7 17. Rfe1 Nf8 18. Be4
Bd7 19. Qd3 Qf7 20. a4 a5 21. Qe3 Ra6 22. Qf4 Bc8 23. d5 cxd5 24. cxd5 Ke8 25.
Bd3 Ra8 26. Bb5+ Bd7 27. dxe6 Nxe6 28. Qd6 Bxb5 29. Rxe6+ Be7 30. axb5 {
1-0 Dvoirys,S-Zakharevich,I/Kursk 1987}) 13... Be7 14. Qe2 (14. a3 Qxb2 15. c4
Nc3 16. Qd3 Na4 17. Qe3 Nf8 18. Ne5 Nxg6 19. Nxg6 Rf8 20. Nxf8 Bxf8 21. Qf4 Ke8
22. Qf5 Nc3 23. Rxe6+ Bxe6 24. Qxe6+ Be7 25. Re1 {
1-0 Schlosser,M-Kholmov,R/Sochi-A 1989}) 14... Bf6 15. c4 Ne7 16. a3 Qb3 17.
Bd3 Nf5 18. Bxf5 exf5 19. Qe6 Qb6 20. c5 Nxc5 21. Qd6+ Nd7 22. Ne5 Bxe5 23.
Rxe5 Re8 24. Rxe8+ Kxe8 25. Re1+ Ne5 26. Rxe5+ Kf7 27. Re7+ {1-0 Chandler,
M-Huebner,R/Biel 1987     The idea of Kasparov's move is to secure the
d5-square for his knight against the thrust c2-c4. However, it gives White the
chance to open new lines on the queenside and bring his a1-rook into play
without loss of time. Moreover, it fails to deal with the main problem of
Black's position - his inability to move his queen. The only square available
to her is b4, but this not only leaves the e6-pawn undefended, it also allows
White to gain time by chasing the queen.}) 12. a4 Bb7 ({After Nach} 12... bxa4
13. Rxa4 Nd5 14. Bg3 {Black still cannot move the queen, while c4 is imminent.
kann Schwarz immer noch nicht die Dame bewegen, waehrend gleichzeitig c4 droht.
}) 13. Re1 Nd5 ({
Attempting to keep the position closed by Der Versuch, die Stellung mit} 13...
b4 {doesn't work because of geschlossen zu halten, funktioniert nicht:} 14. c4
bxc3 15. bxc3 Nd5 16. Bg3 Nxc3 {or else c4 (sonst kommt c4)} 17. Qb3 {
attacking c3 and b7 (greift c3 und b7 an)} 17... Qb4 18. Qxe6 Be7 19. Bf5 Nb6
20. a5 {with a decisive attack. mit spielentscheidendem Angriff.}) 14. Bg3 Kc8
{Another move which does little to unblock the traffic jam of the kingside.
Ein weiterer Zug, der wenig zur Aufloesung des Verkehrsstaus am Koenigsfluegel
beitraegt.} ({However Allerdings ist} 14... Qb4 {is no better nicht besser:}
15. Rxe6 Be7 16. c3 Qxb2 17. c4 N5f6 (17... bxc4 18. Rb1 Nc3 19. Rxb2 Nxd1 20.
Rxb7 {is easily winning gewinnt leicht}) 18. Ne5 Nxe5 19. dxe5+ Nd7 20. Bf5 {
and wins. und Weiss gewinnt.}) 15. axb5 {
The a1-rook enters the game. Der a1-Turm ist jetzt mit von der Partie.} 15...
cxb5 16. Qd3 Bc6 {Black must defend the weak pawn on b5, but 16...Nc7 loses to
17 Qc3 Nf6 18 Rxe6 Qd8 19 Bf5 Kb8 20 Ne5 Nfd5 21 Nc6+ Bxc6 22 Qxc6. Since 16...
a6 is met by 17 Bf5, as in the game, there is nothing better than the
text-move. Schwarz muss den schwachen Bauern auf b5 verteidigen,} ({aber} 16...
Nc7 {loses to verliert wegen} 17. Qc3 Nf6 18. Rxe6 Qd8 19. Bf5 Kb8 20. Ne5 Nfd5
21. Nc6+ Bxc6 22. Qxc6) ({Since Da auf} 16... a6 {
is met by genauso wie in der Partie} 17. Bf5 {as in the game, there is nothing
better than the text-move. folgt, gibt es letztendlich nichts besseres als den
Textzug.}) 17. Bf5 exf5 {
Other moves also lose, for example Andere Zuege verlieren ebenfalls, z.B.} (
17... Nb4 18. Qc3 Kb7 19. Rxe6 Qd8 20. d5 Bxd5 21. Re8 {or oder}) (17... Nc7
18. Bxc7 Kxc7 19. Rxe6 Qd8 20. Qc3 Bd6 21. Ne5 Nb8 22. Be4) 18. Rxe7 Bxe7 {
Or 18...Nxe7 19 Qc3 Nb8 (19...Kb7 20 Qa5 mates) 20 Ne5 with a crushing attack.
After the move played, Black has sufficient material for the queen, but his
position is a complete wreck. Many of his pieces are still on their original
squares, the ones that are developed are hopelessly uncoordinated and his king
is horribly exposed.} ({Oder} 18... Nxe7 19. Qc3 Nb8 (19... Kb7 20. Qa5 {
mates fuehrt zum Matt}) 20. Ne5 {mit einem vernichtenden Angriff. Nach dem
Textzug hat Schwarz genuegend Material fuer die Dame erhalten, aber seine
Stellung ist ein Truemmerhaufen. Die Tuerme sind immer noch auf ihren
Ausgangsfeldern, die entwickelten Figuren sind voellig unkoordiniert, und der
Koenig ist hoffnungslos exponiert.}) 19. c4 {Die Aufgabe ist eine
verstaendliche Entscheidung, wenn man sich die folgenden Varianten
vergegenwaertigt:} (19. c4 bxc4 (19... Nb4 20. Qxf5 bxc4 21. Ne5) 20. Qxc4 Nb4
21. Re1 Re8 22. Nh4 Nb6 23. Qf7 N6d5 24. Nxf5 Kd8 25. Nxg7 {

Ein Desaster fuer Kasparov.}) 1-0

