Author: Sune Larsson
Date: 14:35:48 02/28/01
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On February 28, 2001 at 16:47:27, Bertil Eklund wrote: >On February 28, 2001 at 16:23:35, Sune Larsson wrote: > >> >> [D]8/5b2/p2k4/1p1p1p1p/1P1K1P1P/2P1PB2/8/8 w - - 0 1 >> >> >> This is one of Averbakh's positions from 1954. >> It's a typical winning position in a good versus bad bishop ending. >> The black pawns on h5, f5, d5 and a6 are vulnerable and curtail the >> movements of the black bishop. To seal black's fate, all white need to do >> is lose a move. That is - repeat the initial position with black to move. >> This may be accomplished as follows: >> >> 1.Be2 Be8 [1.-Bg6 2.Bd3 Bh7 3.Bf1 leads to instant zugzwang, be it after >> 3.-Bg6 4.Bg2 Bf7 5.Bf3 or after 3.-Bg8 4.Be2 Bf7 5.Bf3] >> >> 2.Bd3 Bg6 3.Bc2 Bh7 4.Bb3! Bg8 5.Bd1 Bf7 6.Bf3! and so on >> >> >> Test: The above position is won for white so your program should be able >> to win it. The evals should differ distinctly between white and black. >> >> Sune > >Hej! > >Nimzo8 sees it immediately with a score of more then +2. >It also sees 1.Bg2 as winning with about the same score. > >Bertil Okej, it's a bit hard to find a good balance, when choosing these positions. If they are too easy some people just complain - if they are too hard almost noone answers...;) Sune
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