Author: John Stanback
Date: 11:02:36 04/16/99
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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). > > Zarkov switches from Qxb7 to Be4 after about 15 seconds, but then switches back to Qxb7 after 18 minutes. It appears that Zarkov has nearly the same score for both moves. Here is the output (P2-300): 00:01.0 37376 6> 129 Qxb7 Ra8 a6 Bg7 Nb6 Ne3 00:01.2 46080 6 118 Qxb7 Ra8 Rb6 Bg7 Be4 Qf6 Bxf5 Qxf5 Nxd6 Qxd3 00:02.3 103197 7> 118 Qxb7 Ra8 Rb6 Bg7 Be4 Qf6 Bxf5 Qxf5 Nxd6 Qxd3 00:04.8 202496 7 101 Qxb7 Ra8 Be4 Bxf4 Bxf5 Qg5+ Kh1 gxf5 00:14.7 597504 7 136 Be4 Bxf4 Bxf5 gxf5 Rb2 Qh4 Rg2+ Kh7 Qxb7 00:15.0 609977 8> 136 Be4 Bxf4 Bxf5 gxf5 Rb2 Qh4 Rg2+ Kh7 Qxb7 00:26.8 1081984 8 136 Be4 Qf6 Bxf5 Qxf5 Qxb7 Raa8 Nxd6 Qg4+ Kh1 Bxf4 00:37.7 1534574 9> 136 Be4 Qf6 Bxf5 Qxf5 Qxb7 Raa8 Nxd6 Qg4+ Kh1 Bxf4 01:12.2 2959488 9 125 Be4 Qf6 Qxb7 Raa8 Kh1 Rad8 Qb6 Rfe8 Qc7 01:57.8 4929522 10> 125 Be4 Qf6 Qxb7 Raa8 Kh1 Rad8 Qb6 Rfe8 Qc7 03:46.1 9633152 10 119 Be4 Qf6 Qxb7 Raa8 Kh1 Rad8 a6 Ng7 f5 gxf5 Rb3 06:09.6 16022267 11> 119 Be4 Qf6 Qxb7 Raa8 Kh1 Rad8 a6 Ng7 f5 gxf5 Rb3 14:54.1 38182528 11 115 Be4 Bxf4 Bxf5 Qg5+ Kh1 Qxf5 Qxb7 Ra7 Qxa7 Qxd3 18:04.6 46647040 11 123 Qxb7 Ra8 Be4 Bxf4 Bxf5 Qg5+ Kh1 Qxf5 Nxd6 Qg4 John
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