Author: Laurence Chen
Date: 09:31:46 12/15/98
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On December 15, 1998 at 09:06:23, Thom Perry wrote: >MCP8 will not play 12. Bxh7+ because initially the program believes that black >is about a point ahead after the bishop sacrifice. Following is the analysis >which I ran twice to see whether MCP8 would deviate the second time around with >the learning enabled: > > >M-Chess Pro 8.0, P200-S, 96MEG EDO, Tyan Tomcat motherboard >3min./move, learning enabled > > White Black Depth Score Analysis > ------------------------------------ > > 12. .... Kxh7 8) - 0.53 Kg8xh7 Nf3-g5+ Kh7-g6 Qd1-g4 f7-f5 > Qg4-g3 f5-f4 Qg3-g4 e6-e5 Ng5-e6+ > Kg6-f6 > 1:57:00 1:58:21 > 13. Ng5+ 7) - 0.52 Nf3-g5+ Kh7-g6 Qd1-g4 f7-f5 Qg4-g3 > f5-f4 Qg3-g4 e6-e5 Ng5-e6+ Kg6-f6 > 13. .... Kg6 8) - 0.69 Kh7-g6 Qd1-g4 f7-f5 Qg4-g3 f5-f4 > e3xf4 Ne7-f5 Qg3-g4 > 1:55:44 1:54:57 > 14. Qg4 7) - 0.35 Qd1-g4 f7-f5 Qg4-g3 f5-f4 e3xf4 > Ne7-f5 Qg3-g4 > 14. .... f5 8) - 0.00 f7-f5 Qg4-g3 f5-f4 e3xf4 Ne7-f5 > Qg3-g4 Nf5-h6 Qg4-g3 Nh6-f5 > 1:52:03 1:51:50 > 15. Qg3 8) - 0.00 Qg4-g3 f5-f4 e3xf4 Ne7-f5 Qg3-g4 > Nf5-h6 Qg4-g3 Nh6-f5 > 15. .... f4 7) - 0.00 f5-f4 e3xf4 Ne7-f5 Qg3-g4 Nf5-h6 > Qg4-g3 Nh6-f5 > 1:48:49 1:49:44 > 16. exf4 7) - 0.00 e3xf4 Ne7-f5 Qg3-g4 Nf5-h6 Qg4-g3 > Nh6-f5 > 16. .... Nf5 7) - 0.00 Ne7-f5 Qg3-g4 Nf5-h6 Qg4-g3 Nh6-f5 > 1:46:36 1:46:48 > 17. Qg4 8) - 0.00 Qg3-g4 Nf5-h6 Qg4-g3 Nh6-f5 > 17. .... Nh6 7) - 0.00 Nf5-h6 Qg4-g3 Nh6-f5 > 1:43:21 1:39:26 > 18. Qg3 8) + 0.00 Qg4-g3 Nh6-f5 > 18. .... Nf5 8) - 0.00 Nh6-f5 Qg3-g4 > 1:41:02 1:37:06 > 19. Qg4 9) + 0.00 Qg3-g4 Nf5-h6 > 19. .... Nh6 9) - 0.00 Nf5-h6 Qg4-g3 > 1:37:25 1:34:00 > 20. Qg3 9) + 0.00 Qg4-g3 Nh6-f5 > 20. .... Nf5 9) + 0.00 Nh6-f5 > 1:33:02 1:31:00 > > Game was drawn by 3rd repetition! Let's try again to see whether MCP8 > has learned anything from the first iteration. > > White Black Depth Score Analysis > ------------------------------------ > > 12. .... Kxh7 8) - 0.53 Kg8xh7 Nf3-g5+ Kh7-g6 Qd1-g4 f7-f5 > Qg4-g3 f5-f4 Qg3-g4 e6-e5 Ng5-e6+ > Kg6-f6 > 2:00:00 1:58:21 > 13. Ng5+ 7) - 0.52 Nf3-g5+ Kh7-g6 Qd1-g4 f7-f5 Qg4-g3 > f5-f4 Qg3-g4 e6-e5 Ng5-e6+ Kg6-f6 > 13. .... Kg6 8) - 0.69 Kh7-g6 Qd1-g4 f7-f5 Qg4-g3 f5-f4 > e3xf4 Ne7-f5 Qg3-g4 > 1:58:44 1:55:14 > 14. Qg4 7) - 0.35 Qd1-g4 f7-f5 Qg4-g3 f5-f4 e3xf4 > Ne7-f5 Qg3-g4 > 14. .... f5 8) - 0.00 f7-f5 Qg4-g3 f5-f4 e3xf4 Ne7-f5 > Qg3-g4 Nf5-h6 Qg4-g3 Nh6-f5 > 1:55:03 1:52:07 > 15. Qg3 8) - 0.00 Qg4-g3 f5-f4 e3xf4 Ne7-f5 Qg3-g4 > Nf5-h6 Qg4-g3 Nh6-f5 > 15. .... f4 7) - 0.00 f5-f4 e3xf4 Ne7-f5 Qg3-g4 Nf5-h6 > Qg4-g3 Nh6-f5 > 1:51:48 1:50:00 > 16. exf4 7) - 0.00 e3xf4 Ne7-f5 Qg3-g4 Nf5-h6 Qg4-g3 > Nh6-f5 > 16. .... Nf5 7) - 0.00 Ne7-f5 Qg3-g4 Nf5-h6 Qg4-g3 Nh6-f5 > 1:49:36 1:47:05 > 17. Qg4 8) - 0.00 Qg3-g4 Nf5-h6 Qg4-g3 Nh6-f5 > 17. .... Nh6 7) - 0.00 Nf5-h6 Qg4-g3 Nh6-f5 > 1:46:21 1:39:44 > 18. Qg3 8) + 0.00 Qg4-g3 Nh6-f5 > 18. .... Nf5 8) - 0.00 Nh6-f5 Qg3-g4 > 1:44:02 1:37:25 > 19. Qg4 9) + 0.00 Qg3-g4 Nf5-h6 > 19. .... Nh6 9) - 0.00 Nf5-h6 Qg4-g3 > 1:40:25 1:34:19 > 20. Qg3 9) + 0.00 Qg4-g3 Nh6-f5 > 20. .... Nf5 9) + 0.00 Nh6-f5 > 1:36:02 1:31:18 > >Same result. Thanks Thom Perry for the analysis, it is the same with Junior 5. Well it is Black who forces a draw by repitition. After 17. Qg4, every other Black move gives White the advantage with exception of 17. ... Nh6. r1bq1r2/pp4p1/4p1k1/2n2nN1/5PQ1/2N5/PP3PPP/R4RK1 b - - 0 17 Analysis by Junior 5.0: = (0.00): 17...Nh6 18.Qg3 +- (1.72): 17...Kf6 18.Rad1 Qb6 19.Nh7+ Kf7 20.Nxf8 Kxf8 21.Qg6 +- (1.83): 17...Kh6 18.b4 Qd3 19.Rac1 Nd7 20.Nxe6 Rf7 21.Rfd1 Qc4 22.Ng5 Rf8 23.Rd5 +- (2.41): 17...Qe7 18.Nxe6+ Kh7 19.Nxf8+ Qxf8 20.Rae1 Nh6 21.Qg3 Ne6 22.Re4 Qc5 +- (2.96): 17...Nd4 18.Nxe6+ Kf6 19.Qxg7+ Kxe6 20.Rfe1+ Kd6 21.Rad1 Qf6 22.Rxd4+ Kc6 23.Qxf6+ Rxf6 24.Re7 Bf5 +- (3.38): 17...Qe8 18.Nxe6+ Kh7 19.Nxc5 Qg6 20.h3 Qxg4 21.hxg4 Nh4 22.f5 Re8
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