Author: John Merlino
Date: 11:36:31 04/13/02
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On April 13, 2002 at 07:49:31, leonid wrote: >Hi! > >Recently I found that for many programs selective search for mate is pretty >different. At least, in few recent mate positions my default selective was >useless. I am curious to see how many other programs can solve this position by >selective. Mine was useless on this even if it look like to be ideal for >selective. Position in itself is not deep, or very difficult. > >[D]1qbqkbq1/QBRNBNQ1/1QnQpQn1/1q1RQ1p1/3rn3/2Q2Q2/Q6K/1r4r1 w - - > >Please indicate your result, never mind your way of solving this mate. > >Thanks, >Leonid. I don't know if it's the shortest mate, but it took Chessmaster a long time (on a PIII-733) to find Mate in 10 anyway (with some HUGE evals along the way), as the first seven moves are all non-checking moves: Time Depth Score Positions Moves 0:04 1/3 49.36 180892 1.Nxb8 Rh1+ 2.Qxh1 Rxh1+ 3.Kxh1 Bd7 4.Qxg8 Ncxe5 5.Qxd7+ Qdxd7 6.Rxb5 0:34 1/4 50.65 1695430 1.Nxb8 Rh1+ 2.Qxh1 Rxh1+ 3.Kxh1 Bd7 4.Qxg8 Nxf6 5.Qxb5 Ncxe5 6.Qxf8+ Nxf8 7.Bxd8 3:42 1/4 52.41 10882850 1.Qdxe6 Rh1+ 2.Qxh1 Rxh1+ 3.Kxh1 Nf2+ 4.Qaxf2 Qf1+ 5.Qxf1 Rh4+ 6.Kg1 27:28 2/5 66.77 83972601 1.Qdxe6 Rh1+ 2.Qxh1 Qh8+ 3.Nxh8 Rxh1+ 4.Kxh1 Nf2+ 5.Qaxf2 Qf1+ 6.Qxf1 Rh4+ 7.Kg1 Rg4+ 8.Qxg4 32:58 2/6 Mate10 108254761 1.Qdxe6 Rh1+ 2.Qxh1 Qh7+ 3.Qxh7 Rd2+ 4.Qaxd2 Rxh1+ 5.Kxh1 Qb1+ 6.Qxb1 Ng3+ 7.Qexg3 Qxe7 8.Qfxe7+ Bxe7 9.Nf6+ Kf8 10.Qg8# jm
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