Author: John Merlino
Date: 11:53:16 07/14/04
Go up one level in this thread
On July 14, 2004 at 10:15:35, Mihaly Szalai wrote:
>Position after 50. axb5:
>
>[D]8/3k4/p7/1P6/3B4/1nP5/6KP/8 b - - 0 50
>
>Chessmaster 9000 default personality played here 50...Nxd4? and
>lost after 51.bxa6!
>
>I thought it's related to egtb probing but Fritz 5.32 has no problem here.
>
>Of course, after the natural 50...axb5 white has an extra pawn but black
>can fight for a draw with good chances, eg:
>
>51. Be3 (51. Kf3 b4 52. Ke3 bxc3 53. Bxc3 Ke6 54. Kf4 Nc1 55. Kg5 Ne2 56. Bb2
>Ng1 57. Kg4) (51. Bf2 Nd2 52. Be1 Nb3) 51... Ke6 52. Kf3 Kf5 53. h4 Na5 54. h5
>Nc6 55. Ke2 (
>55. h6 Kg6 56. Ke2 b4 57. c4 b3 58. Bc1 Kh7 59. c5 Kg6 60. Kd3 b2 61. Bxb2 Kxh6
>62. Ke4 Nb8 63. Be5 Nc6 64. Kd5 Nb4+ 65. Kd6 Kg6 66. Bc3 Na6 67. c6 Kf7 68. Bb2
>Ke8 69. Bf6 Kf7 70. Bd8 Ke8 71. Ba5) 55... b4 (55... Ne5 56. h6 Kg6 57. Bf4 Nd7
>58. Kd3 Nc5+ (58... Nf6 59. Kd4 Ng4 60. Kc5 Nf6 61. Be3 Ne4+ 62. Kd4) 59. Kd4
>Ne6+ 60. Ke5 Nc5) 56. c4 b3 57. Bc1 b2 58. Bxb2 Kg5 59. Kd3 Kxh5 60. Ke4 (60.
>c5 Kg6 61. Ke4 Nb8 62. Be5 Na6 63. c6 Kf7) 60... Kg6 61. Kd5 Nb4+ 62. Ke6 Nd3
>63. Ba3 Nf4+ 64. Ke5 Nd3+ 65. Kd4 Ne1 66. Kd5 Nd3 67. Ke4 Nf2+ 68. Kd4 Ng4 69.
>c5 Kf7 etc.
>
>What is your opinion?
>
>Mihaly
How did the rest of the game play out after 50...Nxd4? In the game that I set up
between two versions of Chessmaster, it ended in a draw after:
50...Nxd4 51.cxd4 a5 52.h4 a4 53.h5 a3 54.h6 a2 55.h7 a1=Q 56.h8=Q Qb2+
57.Kf3 Qxb5 {tablebase draw}
jm
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