Author: Jeremiah Penery
Date: 09:32:54 11/06/98
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On November 06, 1998 at 11:25:58, James Robertson wrote: >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) How can black's knight make Nd5 then Ng5 consecutively? Is 2. ...Nd5 supposed to be Ne6? >>>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? But black is winning there... I'm curious, what moves were played up until 4.Qg6? Is the black pawn no longer on f7 to capture? >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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