Author: leonid
Date: 11:49:12 04/13/02
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On April 13, 2002 at 14:36:31, John Merlino wrote: >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: So, actually Chessmaster took this position by selective and not that far from shortest one. Pretty good! This position is mate in 9 moves. Cheers, Leonid. >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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