Author: Chuck
Date: 13:26:35 02/11/01
Go up one level in this thread
On February 11, 2001 at 15:32:13, Alex Patterson wrote: >On February 11, 2001 at 12:58:02, Uri Blass wrote: > >>On February 11, 2001 at 12:45:07, Alex Patterson wrote: >> >>>On February 11, 2001 at 12:24:21, Vincent Lejeune wrote: >>> >>>>in this position : >>>> >>>>[d]k7/p7/1p6/3p4/3K1B2/r7/8/4R3 w - - 0 1 >>>> >>>>Gambit Tiger 1.0 gives +2.14 for white , I think it's a big overevaluation for >>>>white ! >>>> >>>> >>>> >>>>consequence : in this position >>>> >>>>[d]k7/p7/1p6/3p4/3K1p2/PP3r2/7B/4R3 b - - 0 1 >>>> >>>>Tiger 1.0 wants to play Rf2?? >>> >>> >>>So? Rf2! is the best move, and that is backed up by crafty, TCB, and HIARCS. >>>Anyway I dont see the problem with Rf2!. >> >>Rf2 is not the best move of Crafty18.1 >>It prefers Rxb3 with evaluation of 0.00 at depth 15 >> >>After Rf2 Crafty can see a clear advantage for white (1.54 pawns at depth 13 and >>1.68 at depth 14) >>The problem is that tiger does not know that rook and a bishop with no pawns >>usually cannot win. >> >>It is a known problem of tiger and it is not news. > > >I was using crafty 15.14 for that analysis. > > -Alex >> >>Uri And I wonder what version of Hiarcs you are using, because my copy of Hiarcs 7.32 (using all 5-pice-and-less tablebases) selects Rxb3 from a depth of 1 (+0.88 score) all the way through 14 (+0.68 score). It doesn't see black winning, but the score is heading in that direction and he does see the first move. It didn't report any tablebase hits until a depth of 10, so they didn't help at depth 1. Fritz 6 generally agrees with this, not getting a tablebase hit until depth=11.
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