Author: Eduard Nemeth
Date: 06:41:19 12/05/05
Go up one level in this thread
On December 05, 2005 at 08:51:29, Uri Blass wrote: >On December 05, 2005 at 08:34:26, Gabor Szots wrote: > >>Just two examples. Positions taken from from PET. >> >> >>8/5k2/4p3/4Pp1p/5P1P/3Rn2K/6p1/8 b - - bm g1=B; id "PET026: rook >>vs knight"; >> >>Here Rybka plays g1Q, although it does see it is only draw. >> >> >>8/8/1P1k2p1/8/5P1p/4Qb2/1q4PK/8 w - - bm Qe5+; id "PET046: Q+B >>vs Q"; >> >>Rybka captures at f3. >> >> >>Both positions are easily solved by most of the engines. Position No26 usually >>in 0 seconds. > >It seems that Rybka does not consider underpromotions > >[D]8/3P1k2/2q5/8/8/6Pb/7P/6K1 w - - 0 1 > >New game, >8/3P1k2/2q5/8/8/6Pb/7P/6K1 w - - 0 1 > >Analysis by Rybka 1.0 Beta 32-bit: > >1.Kf2 Qc2+ > -+ (-17.90) Depth: 3 00:00:00 >1.Kf2 Qc2+ > -+ (-17.95) Depth: 4 00:00:00 >1.Kf2 Qc2+ > -+ (-320.00) Depth: 5 00:00:00 > >(, 05.12.2005) > >In the second position it is really strange that rybka cannot solve it in a >short time and I guess that there is a bug. > >Uri I seems that is a BUG, rybka sees a Mate and and would like to compute not further in such a position. I hope that the programmer become a BUG Report about this. Best, Eduard.
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