Author: Oliver Roese
Date: 15:38:16 04/24/02
Go up one level in this thread
On April 24, 2002 at 17:00:09, Sune Larsson wrote: >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 You are right, that's it. I couldn't find another idea to win, so it seems this position is a draw. Pretty amazing, i think. Where does this position come from? Oliver >> >> >>> 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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