Author: Steven J. Brann
Date: 16:12:26 01/02/03
Go up one level in this thread
On January 02, 2003 at 17:35:37, John Merlino wrote: >On January 02, 2003 at 12:47:12, Art Basham wrote: > >>White mates if ....black plays KxQ... >> >>[D]1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1 >> >>I do not remember the solution, but the white rook at a5 >>is brought back to a1 to mate the black King in about 8 or 9 moves..etc. >>I lost the solution..sorry...:-) >>Art > >This position was posted before, and it definitely flummoxes Chessmaster 9000. >Even after forcing moves all the way up to 5...Kh2, it STILL takes exactly two >minutes (on a humble P3-733) to find 6.Bg3 and announce a winning score. It >finally announces a mate after a little more than eight minutes: > >Time Depth Score Positions Moves >0:00 1/3 -8.22 5757 6.Rg3 e5 7.Nxc6 Rbc8 8.Ra7 >0:00 1/4 -8.18 11989 6.Rg3 e5 7.Nxc6 Rbc8 8.dxe5 Bxe5 > 9.Rh3+ Qxh3 10.Bxh3 Kxh3 11.Rxb5 >0:00 1/5 -7.92 43740 6.Rg3 e5 7.Nxc6 Ra8 8.Rxb5 exd4 > 9.Nxd4 Bxd4 10.cxd4 >0:01 1/6 -8.36 75497 6.Rg3 e5 7.Nxc6 Ra8 8.Rxf3 Rxa5 > 9.Nxa5 e4 >0:03 1/7 -8.02 251193 6.Rg3 e5 7.Rxf3 exd4 8.cxd4 Nd6 > 9.Nxc6 Nc4+ 10.Bxc4 dxc4 >0:11 1/8 -7.92 834581 6.Rg3 e5 7.Rxf3 exd4 8.Rg3 dxc3+ > 9.Kc1 d4 10.Nxc6 Rbe8 11.Rg2+ Kh3 > 12.Rxg7+ Kh2 >0:53 1/9 -8.04 4091649 6.Rg3 e5 7.Rxf3 Qg4 8.Rh3+ Qxh3 > 9.Bxh3 Kxh3 10.Nxc6 Rbc8 11.dxe5 > Nxe5 12.Nxe5 Bxe5 13.Rxb5 Bxc3+ > 14.Kc2 >2:00 1/9 2.30 9170325 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 > 9.Kxa1 Ra8+ 10.Kb2 Ra1 11.Rxa1 > Qa7 12.Rxa7 >2:07 1/10 2.30 9902435 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 > 9.Kxa1 Ra8+ 10.Kb2 Ra1 11.Rxa1 > Qa7 12.Rxa7 >2:33 2/11 2.50 12933238 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 > 9.Kxa1 Ra8+ 10.Kb2 Ra1 11.Rxa1 > Qa7 12.Rxa7 Kxf1 13.Nxc6 >8:04 3/12 Mate10 47767168 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 > 9.Kxa1 Ra8+ 10.Kb2 Ra1 11.Kxa1 > Qa7+ 12.Na2 Qxa2+ 13.Kxa2 f2 14.Bh3+ > f1=Q 15.Rxf1# > >jm CM9000 will ultimately find the mate in 15. Just takes a bit longer. P4 1.9G default personality with 128 meg of hash and selective search = 12. Time Depth Score Positions Moves 0:00 1/6 -1.43 94171 1.h5 Nd6 2.hxg6+ Kh8 3.Qxf3 Nc4+ 4.Bxc4 bxc4 5.Rxh6+ gxh6 6.Qxf6+ Rg7 0:03 1/7 -1.48 412928 1.h5 Kh8 2.hxg6 Ng5 3.Nxc6 Qxc6 4.Ra7 Rgc8 5.Qc2 0:09 1/8 -1.53 1255822 1.h5 Ng5 2.hxg6+ Kh8 3.Be3 Ra8 4.Nxc6 Qxc6 5.Rxa8 Rxa8 6.Bxg5 Bxg5 7.Qxf3 0:22 1/9 -1.52 3187362 1.h5 Ng5 2.Qxg6+ Kh8 3.Be3 Ne4 4.Bxh6 Qc7 5.Nxc6 Qxc6 6.Ra3 Ra8 1:33 1/10 -1.56 13993123 1.h5 Nd6 2.Qxg6+ Kh8 3.Bd3 Ne4 4.Na6 Ra8 5.Nc5 Qe8 6.Rxa8 Qxa8 7.Bxe4 dxe4 8.Nxe6 4:04 1/11 -1.61 37033157 1.h5 Nd6 2.Ra6 Kh8 3.Nxc6 Nc4+ 4.Kc2 Ra8 5.Nb4 Rxa6 6.Nxa6 Ra8 7.Qxf3 Rxa6 8.Bxc4 bxc4 9.hxg6 11:01 1/12 -1.53 103396397 1.h5 Nd6 2.Qxg6+ Kh8 3.Bd3 Ne4 4.Be3 Ra8 5.Rxa8 Rxa8 6.Bxh6 Qc8 7.Bxe4 dxe4 8.Bf4 Bb7 12:45 1/12 2.86 123069710 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Qa7 8.Rd1 Qa4 9.Nc2 Qa2+ 10.Kxa2 Ra8+ 11.Kb1 Ra1+ 12.Kxa1 Ra8+ 13.Kb2 Ra2+ 14.Kxa2 15:07 1/13 5.28 154024631 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 9.Kxa1 Ra8+ 10.Na2 Rxa2+ 11.Kxa2 Qa7+ 12.Kb2 Qa3+ 13.Kxa3 Be7+ 14.Kb2 Ba3+ 15.Kxa3 b4+ 16.cxb4 18:55 2/14 Mate15 207329828 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 9.Kxa1 Ra8+ 10.Kb2 Ra1 11.Kxa1 Qa7+ 12.Na2 Qxa2+ 13.Kxa2 f2 14.Bh3+ f1=Q 15.Rxf1# Steve
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