Author: Robert Hyatt
Date: 09:52:16 08/24/98
Go up one level in this thread
On August 24, 1998 at 11:26:23, Andreas Stabel wrote: >On August 24, 1998 at 10:50:48, Bernhard Bauer wrote: > > >>Here a position without knights. >> >>White(1): White(1): >> +---+---+---+---+---+---+---+---+ >> 8 | *K| | K | | | | B | | >> +---+---+---+---+---+---+---+---+ >> 7 | *B| | | | | | | | >> +---+---+---+---+---+---+---+---+ >> 6 | | | | | | | | | >> +---+---+---+---+---+---+---+---+ >> 5 | | | | | | | | | >> +---+---+---+---+---+---+---+---+ >> 4 | | | | | | | | | >> +---+---+---+---+---+---+---+---+ >> 3 | | | | | | | | | >> +---+---+---+---+---+---+---+---+ >> 2 | | | | | | | | | >> +---+---+---+---+---+---+---+---+ >> 1 | | | | | | | | | >> +---+---+---+---+---+---+---+---+ >> a b c d e f g h >> >>White(1): end-game phase >> clearing hash tables >> time surplus 0.00 time limit 5:00 (5:00) >> depth time score variation (1) >>starting thread 1 >> time: 0.03 cpu:6166% mat:0 n:600 nps:10000 >> ext-> checks:60 recaps:0 pawns:0 1rep:0 >> predicted:0 nodes:600 evals:1 >> endgame tablebase-> probes done: 0 successful: 0 >> hashing-> trans/ref:0% pawn:0% used:w0% b0% >> >>White(1): Bh7 >> time used: 0.03 >>learning position, wtm=1 value=-66 >>game is a draw due to insufficient material. >> >>Do we really have to pay the price? >> >>Kind regards >> >>Bernhard >> > >I agree fully with Hyatt's reasons for keeping this, but I wonder why >crafty doesn't handle this right when I include the EGTB tables ? > >I understand that this pops up very rarely in real games, but it is >perhaps more frequent in problems. It would be nice if crafty had an >analyze option where it would be possible to turn off this and perhaps >null move. When I analyze positions I often let them run the whole night >and it could perhaps be argued that with this much thinking time, one could >defend not using null move ? > >If I have understood things correctly, crafty already evaluates things >a little differently in analyze mode, than in ordinary play. If so, does >crafty use this special analyze mode also when using the test command ? > >Best regards >Andreas Stabel This is actually possible to implement... however, at present, if you have KNN vs KP tablebase files, it still won't work... #1, crafty only probes the KRPKR (and promotion cases) unless it is modified. #2, it won't get to the probe because it calls KNN vs KP a draw before the probe is done, and the search never gets a chance to hit the tablebase... I am going to modify this in some way to help with the tablebases, and doing it in analysis mode could also be a possibility...
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