Author: Jim Monaghan
Date: 07:24:57 10/10/00
Hi Everyone, Let's get out our boards, er monitors, consider: 4q1kr/p6p/1prQPppB/4n3/8/2P5/PP2B2P/R5K1 w - - 0 1 I fed this into Crafty 17.13 and Yace 0.23. Crafty 13-> 12:18 -0.91 1. Qa3 Rxe6 2. Qxa7 Nf7 3. Bc4 Re4 4. Bxf7+ Qxf7 5. Qxb6 Qe6 6. Qxe6+ Rxe6 7. Kf2 Kf7 8. Rd1 Rhe8 9. Rd7+ R6e7 Yace 98238463 903.3 -0.32 12f.: Qd6a3 a7a6 Be2b5 a6xb5 Qa3a7 Ne5d7 e6xd7 Qe8d8 Qa7a3 Kg8f7 Qa3b3+ Kf7e7 Qb3b4+ Rc6c5 Bh6e3 Qd8xd7 Be3xc5+ b6xc5 Qb4xc5+ Ke7f7 [0] They both perfer 1 Qa3 with a slight disadvantage after 15 minutes thought. the position is Gusev-Averbach, 1946 where white won as folows: 1.Qxe5! (Black's king and rook are unfortunately placed inviting a neat queen sac, which ties black up completely ... in spite of his huge material advantage.) 1...fxe5 2.Rf1! (threatening 3.Bb5 and 4.Bxc6) 2...Rc8 [2...Rxe6 3.Bc4 leads to mate] 3.Bd1! Rc4 [3...Qxe6 4.Bb3 Qxb3 5.axb3 and white's king moves to the q-side] 4.Bb3 b5 5.Bxc4 bxc4 6.b3 (creating a passed pawn against which black is helpless, as his queen is paralyzed by the threat of mate, 6 b4! is still more precise) 6...a5 7.bxc4 Qe7 8.Kg2 Qa3 9.Rf2 Qe7 10.Rf1 g5? [10...Qa3 11.Rf7 Qxa2+ 12.Kg3 Qa3 13.c5! Qxc3+ 14.Kg4 Qxc5 15.Rg7+ Kf8 16.Rc7++-] 11.Rf5 g4 12.c5 Qd8 13.c6 Qe7 14.c7 (1-0) A beautiful positional sacrifice that is hard for engines to see ... the normal evaluation of the pieces and position is exceptional. Can Gandolph solve this in 15 minutes? I posted this in the WB forum, apoligies for the duplicate, but perhaps some here don't check there as often. Anyway, Jouni asks a good question ... " Show me the win after 2... Rc7 or 2... Qe7. There is not a simple answer! I tried this in Fritz 5, the strongest engine I have and stepping through it slowly is not promising. I can't help but feel (hope) that Gusev was right. In some lines the key is not to liquadate white's pressure, but slowly improve white's game. For instance, 1Qxe5 fxe5 2Rf1 Rc7 3Bd1 Re7 4Bb3 a6 5Rf7 Rxf7 6exf7+ Qxf7 7Kg2, hmmm Black is close to consolidating here. Two questions: Could someone with a stronger engine save Gusev? And (2) what program is used to make those neat diagrams on this newsgroup and how is the image pasted? Sorry if this second one is dumb:-) Cheers, Jim
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