by Carlhole » Fri 20 Feb 2009, 13:18:37
$this->bbcode_second_pass_quote('Narz', 'Y')eah, 14. Nxb5 was the move to make.
How about Rybka vs. Rybka in that position? I bet it would have been a draw.
Rybka vs. Rybka
1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 d6 7. Be2 Nxd4
8. Qxd4 Bg7 9. Be3 O-O 10. Qd2 Be6 11. O-O Qa5 12. Rad1 Rfc8 13. b3 b5 14.
Nxb5 {+0.44/15} Qxd2 {-0.39/14} 15. Bxd2 {+0.51/17} Nxe4 {-0.41/15} 16.
Bf3 {+0.41/16} f5 {-0.48/14} 17. Rfe1 {+0.43/16} d5 {-0.40/15} 18.
Bf4 {+0.44/15} dxc4 {-0.51/15} 19. Nc7 {+0.47/16} Rxc7 {-0.50/15} 20.
Bxc7 {+0.50/17} cxb3 {-0.48/17} 21. axb3 {+0.51/17} Bxb3 {-0.53/18} 22.
Rd8+ {+0.52/17} Rxd8 {-0.48/17} 23. Bxd8 {+0.47/16} Bd5 {-0.54/16} 24.
Bxe7 {+0.53/17} Kf7 {-0.52/16} 25. Bb4 {+0.54/16} Ke6 {-0.85/17} 26.
Rc1 {+0.58/17} Be5 {-0.91/17} 27. Bxe4 {+0.79/16} Bxe4 {-0.65/17} 28.
Bc3 {+0.75/19} Bd6 {-0.78/17} 29. Ra1 {+0.77/18} Bc5 {-0.85/18} 30.
Bd2 {+0.92/19} Bd3 {-0.91/18} 31. Be3 {+0.94/20} Bxe3 {-1.01/20} 32.
fxe3 {+1.05/22} a6 {-1.02/20} 33. Rc1 {+0.95/21} Bb5 {-1.01/19} 34.
Rc7 {+1.07/20} h6 {-1.07/19} 35. Rg7 {+1.08/20} g5 {-0.93/19} 36.
Kf2 {+1.01/19} a5 {-1.13/20} 37. Rg6+ {+1.16/20} Kd5 {-1.18/22} 38.
Ke1 {+1.16/22} a4 {-1.18/21} 39. Kd2 {+1.16/21} a3 {-1.18/20} 40.
Kc3 {+1.37/20} a2 {-1.19/19} 41. Kb2 {+1.31/20} Ke4 {-1.21/18} 42.
Re6+ {+1.28/20} Kd3 {-1.30/22} 43. Rf6 {+1.34/19} Ke4 {-0.89/19} 44.
Kxa2 {+1.02/18} Bf1 {-0.97/21} 45. Re6+ {+1.02/17} Kd3 {-0.97/18} 46.
g3 {+0.97/16} Bg2 {-0.90/19} 47. Kb1 {+0.53/18} Be4 {-0.62/17} 48.
Rxh6 {+1.03/22} Kxe3+ {-0.38/19} 49. Kc1 {+0.78/23} f4 {-0.34/18} 50.
gxf4 {+0.63/23} gxf4 {-0.84/17} 51. Kd1 {+0.46/23} f3 {-0.72/21} 52.
Re6 {+0.35/26} f2 {-0.05/26} 53. Rxe4+ {+0.31/25} Kxe4 {-0.05/32} 54.
Ke2 {+0.31/25} f1=Q+ {-0.05/25} 55. Kxf1 {+0.31/24} Kf5 {-0.05/39} 56.
Ke2 {+0.35/37} Kg6 {-0.05/33} 57. Kf2 {+0.35/24}
*
If you copy the above to clipboard, you can paste it into Winboard and see the game play out.
This game I called a draw because only Kings and a single white pawn on the h-column were left by move 57. There's no way white can promote the pawn. That ending always ends in a draw. This sort of thing always seems to happen when you play a chess computer against itself.
But look at the scores in brackets throughout; White is always scored ahead, at one point by as much as +1.34, but for the most part White scored up by about +.50.