Author: Mike Byrne
Date: 20:04:09 01/04/05
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On January 04, 2005 at 20:46:26, Joshua Lee wrote: >Which Mephisto Version Beat Deep Thought? I am not sure which version, It is labled "Mephisto X" in mostof the accounts of the tournament. The win in the 5th round over Deep Thought allowed Hitech to claim victory. Mephisto X lost to Rebel prevented Mephisto from finishing 1st. Since Ed programs Rebel, I am sure Richard Lang was the programmer of Mephisto X and based on the success of the Genius programs later, I am sure it was an early prototype of Genius. reference: 20th ACM North America Computer Chess Championship [Event "?"] [Site "North American Compu"] [Date "1989.??.??"] [Round "?"] [White "COMP Mephisto"] [Black "COMP Deep Thought"] [Result "1-0"] 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 Bg4 5.Bxc4 e6 6.h3 Bh5 7.Nc3 Nbd7 8.g4 Bg6 9.Nh4 Be4 10.Nxe4 Nxe4 11.Nf3 Nd6 12.Bb3 Qe7 13.Bd2 h5 14.Rg1 hxg4 15.hxg4 O-O-O 16.Ba5 b6 17.Bb4 a5 18.Bxd6 Qxd6 19.Qc2 Be7 20.O-O-O Rh3 21.Nd2 c6 22.Rh1 Rdh8 23.Rxh3 Rxh3 24.Ne4 Qc7 25.Kb1 g5 26.Rc1 Kb7 27.Ba4 Nb8 28.Nd2 Qd7 29.Bb3 Na6 30.Qe4 Nb4 31.a3 Nd5 32.Qg2 Rh8 33.Ne4 f6 34.Qg3 Rg8 35.Rh1 f5 36.gxf5 exf5 37.Qh3 Rf8 38.Nd2 Bf6 39.Qh7 Rf7 40.Qh6 Qe6 41.Qg6 Rg7 42.Rh7 Rxh7 43.Qxh7+ Be7 44.Kc1 Kc7 45.Nf3 Kd8 46.Ne5 g4 47.Qh8+ Kc7 48.Kd2 Kb7 49.Nxc6 Qxc6 50.Qe5 Nc7 51.Qxe7 Qg2 52.Qh4 f4 53.exf4 Qe4 54.Qxg4 Qxd4+ 55.Kc1 Qxf2 56.Qf5 Qf3 57.Kc2 Kc6 58.Qe5 Nd5 59.Qe6+ Kc5 60.Bxd5 Qxd5 [d] 8/1k2b2Q/1pp1q3/p2n1pp1/3P4/PB2P3/1P1N1P2/1K6 w - - 1 44 The game was not lost out of the opening, but in this postion you can start to see the positives of white's position. With a little bit of additional manuevering white can put tremendous pressure on the c6 sqaure. [d]8/2n5/1pk5/p3Q3/5P2/PB3q2/1PK5/8 b - - 5 58 am Nd5?? Although the game is most likely lost, 58... Nd5 would be considered notoriously weak by today's standards. Perhaps , there was a malfunction. White can win many different ways here once the queens come off. Michael
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