Author: odell hall
Date: 07:59:11 04/16/99
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On April 16, 1999 at 02:59:31, Bruce Moreland wrote: > >On April 15, 1999 at 23:15:08, odell hall wrote: > >>Hi >> >> >>The below position is taken from the Book Secrets of Chess Analysis by Jan >>timman. >> >>3q1rk1/1p3p2/r2p2pb/P1pP1n1p/2N2P2/1QPP4/6BP/1R3RK1 w - - id Geller - Spaasky; >> >> >>28. Be4!!! Timman remarks "White appreciates the strength of the strongpoint f5 >>and defers the capture on b7, which would give black the chance for a promising >>exchange sacrifice. 28. Qxb7, Rxa5 29.Nxa5, Qxa5 and now 29.Qb2(to be able to >>defend important weak points from d2 or c2). >> >> >>I tested rebel on this position and it simply could not resist the pawn on b7! >> However hiarcs6 after 82 sec Chose 28. Bh3!! which I think is about the same >>as Be4. In my opinion this is a excellent positional test for computer programs >>to see just how well they understand position. I suspect that only the strongest >>programs will be able to resist the juicy pawn on B7. I also Tested MChess 8 >>which chose Be4 after one minute thought and +76 evaluation. > >Mine wants to take the pawn, for a really long time. It'd be interesting to >know why others don't want to take the pawn, I expect they wouldn't see 28. Qxb7 >Rxa5, but if someone will play that I'd be interested in knowing. > >Are other programs simply choosing a different way to win material? > >bruce Hi Bruce Neither Hiarcs6 Or Mchess8 seem to see Rxa5!, I think that they both however appreciate the strongpoint on f5! After all I think the reasons for Not taking the pawn are two fold. Ofcourse I could be wrong though. The most dangerous reason is the Night on F5 as timman notes.
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