Author: Thom Perry
Date: 03:30:11 12/25/98
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On December 23, 1998 at 19:17:32, Dann Corbit wrote: >Here is a position that apparently has a lot of mates. Can anyone find a faster >or better solution than the best of these (two tied at 32748) which is >guaranteed to win? >1R1Q4/5k2/p1p1pPb1/P4qp1/B3p3/4P3/5K1P/8 w - - id "C.A.P.47942"; ce 32740; pv >Ke1 Bh7 Qf8+ Kg6 Qg7+ Kh5 Bd1+ g4 Bxg4+ Qxg4 Qxh7+ Kg5 Rg8+ Kxf6 Qh6+ Ke5 Qh8+ >Qg7 Qxg7+ Kd6 Rd8+ Kc5 Qd4+ Kb5 Rb8+ Kxa5 Qb4# >1R1Q4/5k2/p1p1pPb1/P4qp1/B3p3/4P3/5K1P/8 w - - id "C.A.P.47942"; ce 32744; pv >Ke1 Bh7 Rb7+ Kg6 Qe8+ Kh6 f7 Kh5 f8=Q+ Kg4 Bd1+ Kh3 Qh5+ Kg2 Qe2+ Kg1 Qf1+ Qxf1+ >Qxf1+ Kxh2 Rxh7+ Kg3 Rh3# >1R1Q4/5k2/p1p1pPb1/P4qp1/B3p3/4P3/5K1P/8 w - - id "C.A.P.47942"; ce 32748; pv >Ke1 Bh7 Rb7+ Kg6 Qe8+ Kh6 f7 Kh5 f8=Q+ Kg4 Qxf5+ Kxf5 Rxh7 Ke5 Bb3 Kd6 Qe7+ Ke5 >Qxe6# >1R1Q4/5k2/p1p1pPb1/P4qp1/B3p3/4P3/5K1P/8 w - - id "C.A.P.47942"; ce 32748; pv >Ke1 Bh7 Rb7+ Kg6 Qe8+ Kh6 f7 Kh5 f8=Q+ Kg4 Qxf5+ Bxf5 Bd1+ Kh3 Rb2 Bg4 Qh8+ Bh5 >Qxh5# What do the large ce values in your post mean? In my chess program (MCP8), the maximum ce value for a position would be the integer 9999 which corresponds to +99.99 which is mate. A value of 9996 would be +99.96 which is mate-in-4 for the side to move. A value of -0143 would mean -1.43 which would be a small advantage for the other side.
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