Author: Sune Larsson
Date: 14:00:09 04/24/02
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On April 24, 2002 at 15:46:11, Oliver Roese wrote: >Hi! > >On April 24, 2002 at 13:34:21, Sune Larsson wrote: > >> >> [D]8/2b1Bp1k/2p3pP/4P1P1/2P1K3/8/8/8 w - - 0 52 >> >> Every program I've tried so far seems to think that this position >> is won for white. There are evals of more than +3.00. White is a pawn >> up but it's a dead draw. >> >> White's king has three doorways to heaven, a5, c5 and e5. >> But black's bishop is closing everyone of them: >> >> 1) The white king moves to a4 and tries to enter via a5. >> Black keeps the bishop on c7 and shuffles the king. >> >> 2) The white king moves to b4 or d4 and tries to enter via c5. >> Black puts the bishop on b6. >> >I am sorry to oppose but here is the weak point. Lets assume this position would >arise: >[D]6k1/5p2/1bp2BpP/4P1P1/1KP5/8/8/8 w - - 0 1 >White breaks through and gives his pawn e5 for pawn c6. Two passers >are enough to win, e.g:: >1.Be7 Kh7 2.Bc5 Bd8 3.Be3 Bc7 4.Kc5 Bxe5 5.Kxc6 and white wins easily. > >Oliver Roese [D]6k1/5p2/1bp2BpP/4P1P1/2P5/1K6/8/8 b - - 0 1 Before the white king reaches b4, black must play 1.-Ba5! keeping the resource 2.-Bd2! = Sune > > >> 3) All the time black prevents the possibility 1.e6 fxe6 2.Ke5 >> by keeping the bishop on c7. >> >> 4) If white plays his bishop to f4, threatening 1.e6 black plays >> 1.-Bb6. Then 2.e6 fxe6 3.Ke5 is met by Bc7+ >> >> 5) And black has a million of Kg8-h7 moves while white cannot make >> any progress at all. 1.Bd6 Bd8 is nothing. All c5 moves from white >> are just voluntarily closing one possible path for the king. >>
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