Author: Uri Blass
Date: 13:23:09 01/07/06
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On January 07, 2006 at 14:39:32, Dieter Buerssner wrote: <snipped> >>[D] 3rrk2/2p1n1bQ/1p3pp1/1q2B1N1/p1b1PP2/6PB/P1P5/3R1RK1 w - - Be6! mate > >found after 1 minute (no mate score yet). Bxf6 seems to be a forced win, too. >Maybe other moves, too. > >>[D] 4k1rr/1R1R3p/8/8/8/2K5/7P/8 w k - 1.Rd2 (zugzwang) Rf8 2.Kc2 Rhg8 3.Kb2 h6 4.h3 >>h5 [ 4...Rh8 5.h4 Rhg8 6.h5] 5.h4 Rh8 6.Ra7 Rhg8 7.Ka2 +- > >Not found in 5 minutes. Seems very difficult. Even at the end of the 4...Rh8 >line, I don't get a convincing score in 2 minutes. Is the position known to be >correct? I do not know if the line correct and if there is only one winning move but in the 4...Rh8 5.h4 Rhg8 6.h5 line I can get convincing score with yace after 6..Rh8 7.Ra7 Yace has problems to find 7.Ra7 but has no problem to see winning score for white in the position after 7.Ra7(7.Ra7 is not the only winning move and 7.Ka2 also wins) Note that 5.h4 is not the only winning move and it seems that both 5.Ka2 and 5.Ra7 are winning at that point. Fruit can see score of more than +4 very fast after 4.h3 and the same for Glaurung Mainz or Rybka and it seems that for some reason Yace is extremely weak here relative to other programs. Uri
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