Author: martin fierz
Date: 15:17:58 02/19/04
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On February 19, 2004 at 13:15:30, Uri Blass wrote: >On February 19, 2004 at 12:02:12, martin fierz wrote: > >>On February 19, 2004 at 11:22:15, Igor Gorelikov wrote: >> >>>I don't know chess engines that can play good moves in openings without opening >>>book. >>> >>>Best regards, >>>Igor Gorelikov >> >>this is not about opening or not opening. ...O-O?? allows Bxh7+ and it's game >>over. > >It is not game over because you need also to continue it correctly. >It is probably game over after 0-0 Bxh7+ Kxh7 Ng5+ Kg6 h4 but h4 is not easy to >find. > > > my stupid engine will not play O-O on blitz level, and if O-O is played, >>it will play Bxh7+ with a positive (but not winning) score. > >Does it see the correct line with h4? >> >>to say the least, i am surprised that such strong engines don't see the problem >>with ...O-O. >> >>cheers >> martin > >I am not surprised because it is not simple tactics. > >The question if to play Bxh7+ or not to play it is a question of evaluation >and the problem of having good evaluation is not a simple question. hi uri, muse switches from Qg4 to h4 after Kg6 in about 15 seconds on a centrino 1.4GHz. BTW, it seems to me after a short look that Qg4 is also a good move. yes, of course it finds this by slightly speculative king safety evaluation and not by proven material win - but you always have to remember that my program is weak, and i would expect a strong commercial program to see this kind of combination. cheers martin >Yace padderborn also cannot see Bxh7+ in a few minutes on my computer. >I know that yace underestimate king safety but my movei also has problems(it >likes Bxh7+ at small depth but with Kxh7 Ng5+ Kg6 Qd3? and later changes its >mind from Bxh7+ to Ba3 for positional reasons. > >I suspect that if you slightly reduce the value of pawns your muse will be also >unable to find Bxh7+ > > >Uri
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