Author: Richard A. Fowell (fowell@netcom.com)
Date: 22:11:54 12/08/99
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On December 07, 1999 at 20:44:14, Vincent Diepeveen wrote: >On December 07, 1999 at 20:23:41, Robert Hyatt wrote: > >>On December 07, 1999 at 19:44:35, Vincent Diepeveen wrote: >> >>>Hello to All studiers of the game of chess with a program, >>> >>>Here a cool study which has next problems >>> - some zugzwangs (black getting forced to move the queen) >>> - the line(s) that win for white are forced till the end (singular) >>> >>>7k/2q3pP/6P1/8/8/8/6Pp/2RR3K/w - - >> >>I get this on my tiny sony notebook: >> >> >> >> >> >> 20 27:29 4.21 1. Rc4 Qd7 2. Rd5 Qe8 3. Re4 Qb8 4. >> Re1 Qa8 5. Rf1 Qe8 6. Rd4 Qa8 7. Re4 >> Qc8 8. Ra4 Qe8 9. Ra3 Qd8 > >the whole line has been searched such that it allows it to >do a lot of moves which have as main goal to prevent >a move repetition, though the initially idea looks to me definitely >promising! > >Note that Kxh2 allows a stalemate by means of a few checks. > >10. Kxh2 >> Qh4+ 11. Kg1 Qe4 > <snip> Here's some 180 MHz MacChess 5.01 output. MacChess is not as deep a searcher as Crafty, apparently, but the PV matches Crafty for the first 7 ply, anyway. Ply Time Nodes Score Principal Variation --------------------------------------------------------- 12/01|00:01:07| 13378572| +216| Rc3 Qd7 Re1 Qe6 Re4 Qc6 Rc2 Qa8 Rb2 Qf8 Rh4 Qf6 13/01|00:05:03| 58692374| +220| Rc3 Qd7 Re1 Qe6 Re2 Qc6 Re4 Qa8 Rc1 Qf8 Rf4 Qa8 Rh4 13/02|00:05:34| 64775314| +397| Rc4 Qd7 Rd5 Qe8 Re4 Qb8 Re1 Qa8 Rf1 Qe8 Rd3 Qe7 Kxh2 13/08|00:10:07| 117073360| +399| Rc2 Qd7 Rf1 Qe8 Rc4 Qa8 Re4 Qc8 Rfe1 Qe6 Rb1 Qc8 Kxh2 14/01|00:52:40| 599342777| +196| Rc2 Qd7 Rf1 Qf5 Rf3 Qc5 Rff2 Qf5 Rf4 Qc5 Rd4 Qf8 Rdc4 Qd6 14/03|00:58:54| 671672946| +315| Rc4 Qd7 Rd5 Qe8 Re4 Qf8 Rf5 Qb8 Rf1 Qa8 Rb1 Qf8 Kxh2 Qd6+ g3 Qxg6 15/01|02:21:05| 1599806299| +394| Rc4 Qd7 Rd5 Qe8 Re4 Qb8 Re1 Qf8 Rf5 Qa8 Rf3 Qb8 Rf2 Qa8 Kxh2 Qd5 16/01|08:36:18| 5834013527| +395| Rc4 Qd7 Rd5 Qe8 Re4 Qb8 Re1 Qf8 Rf5 Qc8 Rff1 Qd8 Re5 Qc8 Kxh2 Qc6
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