Author: Michael Fuhrmann
Date: 06:38:13 03/10/01
Go up one level in this thread
On March 10, 2001 at 01:58:59, Uri Blass wrote: >On March 10, 2001 at 01:38:25, Pete Galati wrote: > >>On March 10, 2001 at 00:26:57, Michael Fuhrmann wrote: >> >>>[D] 8/8/7P/5kP1/5P2/r7/5K2/8 b - - 0 114 >>> >>> >>>Crafty scores this as -3.26 for white on my computer, yet it seems to be a draw. >>>I don't have all the 5-piece tbs. Is that the problem? >> >>I don't know if that's a problem. I have some of the 5 piece tablebases, >>whatever came with the Junior CD. >> >>It doesn't appear to be a draw to me, White looks like it's in a lot of trouble >>and it's only hope is for Black to blunder. I somehow can't imagine White ever >>promoting any of those pawn considering that the King can't get up there to help >>them promote. To ME at least, all hope looks lost for White, but I could be >>wrong. > >The scores of Crafty suggest that it is a draw. >White cannot promote but black also cannot make progress. >3.26 pawns for black at depth 9-13 and >3.24 pawns for black at depth 14-17 suggest that black cannot make progress. > >The most important tablebases for this endgame is the KRKPP tablebases but >seeing the draw is not an easy problem for computers because black can play a >lot of moves when both sides do no progress and I doubt if they can see it even >with the KRKPP tablebases. > >Uri Actually, when this position came up in a game between crafty (black) and little goliath, little goliath's score was 0.0 while crafty kept showing -3 or thereabouts for about 20 futile moves as it looked for a way to win. The fact that lg was able to see the draw while crafty's score was so big is what struck me. And LG was using no tablebases.
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