Author: Uri Blass
Date: 11:42:10 09/29/01
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On September 29, 2001 at 07:33:59, leonid wrote: >Hello! > >This mate is probably very easy. There are good chance that you will solve it >even by brute force wihtout too much waiting. > >[D]RQ2rqbb/4p2k/1KQQqQ1n/1R2qqpq/1P3P2/1BBPNN2/nq6/rq4QQ w - - > >Please indicate your result. > >Thanks, >Leonid. Easy? I do not understand why do you think that finidng mate in 11 is easy for chess programs when there are so many possible moves that it is easy to get lost in the wrong lines. Finding the mate is very hard for a lot of chess programs. I tried the 2 programs that lead the ssdf for 5 minutes with no success. New position RQ2rqbb/4p2k/1KQQqQ1n/1R2qqpq/1P3P2/1BBPNN2/nq6/rq4QQ w - - 0 1 Analysis by Deep Fritz: 1.Nxe5! -+ (-7.19) Depth: 1/36 00:00:00 554kN 1.Nxe5! Q5xf6 -+ (-4.94) Depth: 1/41 00:00:27 23042kN 1.Bxe5! -+ (-4.91) Depth: 1/41 00:00:29 25492kN 1.Bxe5! Rxb8+ 2.Qxb8 -+ (-2.66) Depth: 1/41 00:00:46 39743kN 1.fxe5! -+ (-2.62) Depth: 1/41 00:00:49 42594kN 1.fxe5! Rxb8+ 2.Rxb8 -+ (-2.50) Depth: 1/41 00:00:53 45517kN 1.Rxe5! -+ (-2.47) Depth: 1/41 00:01:23 72454kN 1.Rxe5! Rxb8+ 2.Rxb8 -+ (-2.16) Depth: 1/41 00:01:56 102509kN 1.Rxe5 Rxb8+ 2.Rxb8 -+ (-2.16) Depth: 2/39 00:02:11 116088kN (Blass, Tel-aviv 29.09.2001) New position RQ2rqbb/4p2k/1KQQqQ1n/1R2qqpq/1P3P2/1BBPNN2/nq6/rq4QQ w - - 0 1 Analysis by Gambit Tiger 2.0: 1.Nxg5+ Qhxg5 -+ (-5.94) Depth: 4 00:00:00 82kN 1.Nxg5+ Qhxg5 2.fxg5 Qxg1 3.g6+ Qfxg6 -+ (-7.26) Depth: 4 00:00:00 122kN 1.Nxg5+ Qhxg5 2.Qxf5+ Q6xf5 3.Qcxe8 Qgxg1 4.Qxf8 Qxh1 5.Nxf5 exd6 -+ (-12.48) Depth: 5 00:00:06 1235kN 1.Qxf5+ Q5xf5 2.Bxe6 Rxb8+ 3.Qxb8 Qxb8+ 4.Rxb8 -+ (-10.06) Depth: 5 00:00:06 1335kN 1.Qxf5+ Qfxf5 2.Nxe5 Rxb8+ 3.Qxb8 Qxc6+ 4.Qxc6 Qxg1 5.Bxb2 Qxe3+ 6.Ka5 Bxe5 7.fxe5 -+ (-9.79) Depth: 6 00:00:09 1890kN 1.Qxf5+ -+ (-8.89) Depth: 7 00:00:35 6795kN 1.Qxf5+ Qfxf5 2.Rxe5 Rxb8+ 3.Rxb8 Qxh1 4.Qxe7+ Bg7 5.Bxe6 -+ (-7.92) Depth: 7 00:00:37 7142kN 1.Qxf5+ Qfxf5 2.Rxe5 Rxb8+ 3.Rxb8 Qxg1 4.Qxh5 Qxe3+ 5.Rxe3 Qxe3+ 6.Kb7 -+ (-7.63) Depth: 8 00:01:19 14798kN 1.Qxf5+ -+ (-6.73) Depth: 9 00:03:57 47088kN 1.Qxf5+ Qfxf5 2.Rxe5 Rxb8+ 3.Rxb8 Qxg1 4.Bxe6 Qgxh1 5.Qxe7+ Qff7 6.Qe4+ Nf5 7.Bxf7 -+ (-4.82) Depth: 9 00:04:39 55099kN (Blass, Tel-aviv 29.09.2001) Uri
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