Author: José Carlos
Date: 01:30:48 06/12/01
Go up one level in this thread
On June 11, 2001 at 11:19:55, Robert Hyatt wrote: >On June 11, 2001 at 03:05:27, Uri Blass wrote: > >>On June 11, 2001 at 01:31:14, Jouni Uski wrote: >> >>>[D]8/4k3/2K5/6p1/6B1/7P/8/8 w - - >>> >>>I tested this simple draw position with 3 engines: >>>Fritz5 +4,53 no TBs >>>Goliath +3,39 no TBs >>>Crafty18.7 +5,01 with 4 piece TBs >>> >>>Hmm. Should this already be solved poblem? >>> >>>Jouni >> >>The position is not simple draw. >>I have not the tablebases to find out if it is a draw or not a draw but white >>may try to force black to play g4 by zunzwang and to win after hxg4. >> >>Uri > > >I have looked at this position a bit closer. It is not so easy to statically >evaluate this one as a draw. Crafty does this early on, but it is possible for >white to eventually zug black into moving. The problem is that if black really >gets zugged, the pawn move will lose. Without the black pawn, this is trivially >drawn, but with it, black has problems staying in front of the pawn. I think >it is likely that many programs could actually lose this without tablebases. >But in any case, Crafty discovers that there are problems here that make it >non-trivial to claim it is drawn: the black king can't get into the corner >and stick because white will him in and zug him to push the pawn and lose. I don't see why the black king can't get to the corner. The only way I see white can force black to move the pawn is something like this: [D]7k/8/4B1K1/6p1/8/7P/8/8 b - - 0 6 Here, after ...g4: hg4 is stalemate Bg4 is a draw due to the h pawn and white bishop. Of course, this is difficult to statically evaluate. José C.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.