Author: Vasik Rajlich
Date: 03:01:02 03/29/04
Go up one level in this thread
On March 27, 2004 at 22:48:47, Olivier Deville wrote:
>Here is the game, if I am not mistaken :
>
>[Event "ICC tourney 504 (15 5)"]
>[Site "Internet Chess Club"]
>[Date "2004.03.26"]
>[Round "1"]
>[White "Rybka"]
>[Black "SearcherX"]
>[Result "0-1"]
>[ICCResult "White checkmated"]
>[WhiteElo "2214"]
>[BlackElo "2534"]
>[Opening "QGD: classical variation (5.Bf4)"]
>[ECO "D37"]
>[NIC "QO.03"]
>[Time "14:03:15"]
>[TimeControl "900+5"]
>
>1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8.
>Qc2 Nc6 9. a3 Qa5 10. O-O-O Be7 11. g4 dxc4 12. Bxc4 Nxg4 13. Nb5 a6 14. Nd6
>Qh5 15. Rhf1 e5 16. Bg3 Nf6 17. Ng1 Bxd6 18. Rxd6 Bf5 19. Be2 Qg6 20. Bd3
>Nd4 21. Bxf5 Nxf5 22. Rd3 Rac8 23. Rc3 Rxc3 24. bxc3 Re8 25. Rd1 b5 26. Rd2
>Qg5 27. Kb2 h6 28. Nf3 Qh5 29. Ng1 e4 30. Ne2 Ng4 31. Rd5 Nf6 32. Nf4 Qg5
>33. Rd2 Ng4 34. Ka2 h5 35. Qd1 Rc8 36. Nd5 Nxg3 37. hxg3 Qe5 38. f4 exf3 39.
>Qxf3 Re8 40. Rd1 Qe6 41. Rd2 Nf6 42. Kb2 Nxd5 43. Rxd5 Qxe3 44. Qxe3 Rxe3
>45. Rxh5 Rxg3 46. Rc5 Re3 47. c4 bxc4 48. Rxc4 f5 49. Rc6 f4 50. Rxa6 f3 51.
>Ra8+ Kf7 52. Ra7+ Re7 53. Ra5 Re6 54. Rf5+ Rf6 55. Rc5 f2 56. Rc7+ Kg6 57.
>Rc1 f1=Q 58. Rxf1 Rxf1 59. Kc2 Rf2+ 60. Kd3 Rf3+ 61. Ke2 Rxa3 62. Ke1 Ra2
>63. Kd1 Kf6 64. Kc1 Kf5 65. Kb1 Rf2 66. Kc1 g5 67. Kd1 g4 68. Ke1 g3 69. Kd1
>g2 70. Kc1 g1=Q# {White checkmated} 0-1
>
>This variation happened twice in top GM play, and in both cases, Black avoided
>12...Nxg4 :
>
>[Event "Advanced Chess rapid"]
>[Site "Leon ESP"]
>[Date "2002.06.22"]
>[Round "4"]
>[White "Anand, V."]
>[Black "Kramnik, V."]
>[Result "1/2-1/2"]
>[ECO "D37"]
>[WhiteElo "2752"]
>[BlackElo "2809"]
>[PlyCount "95"]
>[EventDate "2002.06.21"]
>[Source "Mark Crowther"]
>[SourceDate "2002.06.24"]
>
>1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. a3
>Nc6 9. Qc2 Qa5 10. O-O-O Be7 11. g4 dxc4 12. Bxc4 e5 13. g5 exf4 14. gxf6 Bxf6
>15. Nd5 Ne7 16. Nxf6+ gxf6 17. Rhg1+ Kh8 18. e4 b5 19. Bd5 Nxd5 20. exd5 b4 21.
>axb4 Qa1+ 22. Kd2 Qa6 23. Qc6 Rd8 24. Kc3 Bb7 25. Qxa6 Bxa6 26. Rd4 Rac8+ 27.
>Kd2 Bb7 28. Rc1 Rxc1 29. Kxc1 Kg7 30. Nh4 Rxd5 31. Rxd5 Bxd5 32. Nf5+ Kf8 33.
>Kd2 Ke8 34. Kd3 Kd7 35. Kd4 Be6 36. Ke4 Bxf5+ 37. Kxf5 Kc6 38. Kxf4 Kb5 39. Kf5
>Kxb4 40. Kxf6 Kb3 41. f4 Kxb2 42. f5 a5 43. Kxf7 a4 44. f6 a3 45. Kg8 a2 46. f7
>a1=Q 47. f8=Q Qa2+ 48. Kxh7 1/2-1/2
>
>[Event "TCh-RUS"]
>[Site "Togliatti RUS"]
>[Date "2003.05.25"]
>[Round "10"]
>[White "Khalifman, A."]
>[Black "Onischuk, Al"]
>[Result "1/2-1/2"]
>[ECO "D37"]
>[WhiteElo "2702"]
>[BlackElo "2647"]
>[PlyCount "51"]
>[EventDate "2003.05.16"]
>[Source "Mark Crowther"]
>[SourceDate "2000.03.27"]
>
>1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. a3
>Nc6 9. Qc2 Qa5 10. O-O-O Be7 11. g4 dxc4 12. Bxc4 a6 13. g5 Nh5 14. Bd3 g6 15.
>Be4 e5 16. Bxe5 Nxe5 17. Rd5 Qc7 18. Rxe5 Be6 19. Rd1 Bd6 20. Rxe6 fxe6 21. Qb3
>Ng7 22. Qxb7 Rab8 23. Qxc7 Bxc7 24. Rd7 Rf7 25. Rxf7 Kxf7 26. Kc2 1/2-1/2
>
>Olivier
Hello Olivier,
I can believe that this line is perfectly playable.
After 10. .. Be7, Rybka (without the opening book) likes 11. Nb5 with an
evaluation of +0.08. (Smallest possible positive score for Rybka.)
After 11. g4, the score drops to -1.68.
Inaccurate score doesn't mean that the program will play the position badly -
but in the case of Rybka-SearcherX, this is what happened. 13. Nb5 and 15. Rhf1
just don't fit the position.
Ideally Rybka would understand every type of position. In the meantime, I need
to somehow generate an opening book which doesn't leave her with positions she
can't play. I think removing variations which end with big negative evaluations
would take care of quite a bit of this. It would be a nice GUI option :-)
Cheers,
Vas
ps. BTW I haven't forgotten, today is the deadline for your tournament.
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