Author: Robert Hyatt
Date: 14:17:15 02/03/00
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On February 02, 2000 at 07:36:12, José Antônio Fabiano Mendes wrote: >CHESS4.0-Dartmouth program *** Fourth ACM computer chess tournament >Source:"Chess Skill in Man and Machine", Springer-Verlag,page 163 >[D]r6k/1p3ppp/1p6/1R1Qp3/r3P2q/2P2P2/P2R2PP/K7 w - - >Larry R. Harris writes:"a 9-ply search is required to determine that >Black´s attack is harmless and therefore White can safely proceed with RxP." >It seems though that Black´s attack is strong enough for a draw. >[for instance:1.Rxb6 Qe1+ 2.Rb1 Rxa2+ 3.Rxa2 Qxc3+ and draws] >Any comments? Enjoy,JAFM Actually I am not sure Rxb6 is the best move. As a human I would avoid the nonsense with Rb1, as white still wins a pawn in the deal since the queen is attacking b7. Of course, at that tournament, chess 4.0 was running on an older CDC machine and was searching (maybe) 1K nodes per second, so it is doubtful they were able to get beyond 5 plies, maybe 6 at the max, since they were searching 6 plies in 1976 on the Cyber 176. I was at that tournament watching, but don't remember what they played...
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