Author: James Robertson
Date: 08:25:58 11/06/98
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On November 06, 1998 at 01:43:43, Jeremiah Penery wrote: >On November 06, 1998 at 00:26:37, James Robertson wrote: > >>The following position was reachied in a blitz game between Exchess 2.49 and >>SSEChess 2.01: >> >>4rrk1/ppp2pp1/2qp3p/2n5/2P1PQ1B/3P4/P1P3PP/R4RK1 w - - >> >>Exchess played Qf2 and won about 30 moves later, but I thought that maybe Bf6 >>would be an irresistible sacrifice for a computer program. >> >>After 1. Bf6 gxf6 2. Qxh6, I don't see any way Black can win: >> >>2. ... Nd5 3. Rf3 Ng5 4. Rg3 d5 5. h4 Qd6 6. Kh2 Qe5 7. hxg6 fxg6 8. Qxg6+ Qxg6 >>9. Rxg6+ Kh7 10. cxd5 (evaluated -2.15 for Black by Crafty) >> >>2. ... Nd7 3. Rf3 (And Black can't stop Rg3) > >I ran Crafty on it. Here's what I got after 1.Bf6 gxf6 2.Qxh6: > >2. ... Ne6 3. Rab1 Qc5+ 4. Rf2 Nd4 5. Rxb7 Rb8 6. Rxb8 Rxb8 7. g4 Qg5 8. Qh3 >Rb1+ 9. Kg2 Rb2 (Eval: -1.6 for white) But that is my point; a computer without a tremendously huge amount of time on it's hands can't see the material loss. I played the game with crafty after 1. Bf6 gxf6 2. Qxh6, and Crafty thought it was 1-3 points ahead all the way until about 4. Qg6 when it evaluated -1.?? for Black. But my computer is too slow to get more than 10-12 plies, so I don't know if Crafty was making the best moves. The moves it came up with I was able to defeat, but there may be a better defense. Can anyone see a better plan for Black? Perhaps a very tactical engine like Darkthought or Fritz could see how to escape? James > >Better for white seems: > 1. Bf2 b6 2. Be3 Qd7 3. Rf2 Re7 4. Raf1 Qe6 5. Bd4 Nd7 6. c3 Ne5 7. Rd2 >(Eval near 0) > >Also 1. Bf2 b6 2. Qd2 Qd7 3. Be3 Qg4 4. Rab1 Re7 5. Qd1 Qh4 6. Qf3 Rfe8 looks >about the same. > >Jeremiah
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