Author: Günther Simon
Date: 05:51:15 07/13/05
Go up one level in this thread
On July 13, 2005 at 08:28:08, Ricardo Gibert wrote: >On July 13, 2005 at 08:17:57, Richard Pijl wrote: > >>On July 13, 2005 at 06:17:20, Ricardo Gibert wrote: >> >>>On July 13, 2005 at 04:07:47, Peter Kappler wrote: >>> >>>> >>>>[D] 8/6k1/1P3p2/5P2/8/5b2/7K/8 w - - 0 80 >>>> >>>>It's 3am and I'm certainly tired enough to have missed something subtle, but I >>>>think this is a very simple draw for White. I'd like to know if there is any >>>>engine that can see this *without* tablebases. >>>> >>>>Oh, and if you do have this 6-piece tablebase, could you please confirm that it >>>>is a draw? :) >>>> >>>>-Peter >>> >>>Why can't Black do the following plan? >>>1) Put his K on d6. >>>2) Tempo with his bishop to gain e5 for his K. >>>3) Tempo with his bishop to win the f5 pawn with his K. >>>4) Queen the f-pawn tempoing with his B as needed. >> >>The white king allows access to e5 as he cannot stop it anyway. Instead, the >>whiteking will defend the pawn from g6, where it go to from h6 or h5 whenever >>black's king accesses e5. The bishop cannot be used to chase the king away as >>the white pawn will promote in that case. >>Richard. > >Black plays Ke5 >White plays Kg6 >Black plays B somewhere >White plays K somewhere >Black plays Kxf5 >White plays... Black never ever gets to e5. Actually Black has to prevent White capturing the last f6 pawn. Also there is no tempo gain ever possible, because in all variations White always has 2 choices to move. (May be you overlooked that White is to move in the beginning and already wins the important tempo with attacking the Bishop?) Without the bad placed Bishop f3 Black would win easily. e.g. 1.Kg3 Bc6 2.Kg4 no more progress possible... -> 2...Kf7 3.Kh5 etc. -> 2...Bb7 3.Kh4 etc. -> 2...Kh6 3.Kh4 etc. Guenther
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