Author: Terry Ripple
Date: 18:58:54 06/17/02
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On June 17, 2002 at 15:17:47, John Merlino wrote: >On June 17, 2002 at 11:18:30, Art Basham wrote: > >>Here black (Botvinnik in 1940) played >>...Rxh3+, then ...d4, etc. >> >>[D]5bk1/1p4p1/pP3p2/Pq1pn3/8/1r5P/RN1Br1P1/2QR3K b - - >> >>My computor is way too slow to find this one! >>...Rxg2...? is not the correct move here...! > >Chessmaster 9000 reports Mate in 6 in two seconds on a PIII-600: > >Time Depth Score Positions Moves >0:00 1/3 -3.97 3032 1...Rxg2 2.Nc4 Re2 >0:00 1/4 -4.91 8906 1...Rxg2 2.Nc4 Re2 3.Nxe5 Rxh3+ > 4.Kg1 fxe5 >0:00 2/5 -7.51 52576 1...Rxg2 2.Nd3 Qxd3 3.Qc8 Rf2 >0:01 2/5 -9.18 102236 1...Rxh3+ 2.gxh3 d4 3.Kg1 Qd5 4.Qc4 > Nxc4 >0:02 2/6 -Mate06 187169 1...Rxh3+ 2.gxh3 d4 3.Qc4+ Nxc4 > 4.Ra3 Qd5+ 5.Rf3 Qxf3+ 6.Kg1 Qg2# >0:03 3/7 -Mate06 239145 1...Rxh3+ 2.gxh3 d4 3.Qc4+ Nxc4 > 4.Ra3 Qd5+ 5.Rf3 Qxf3+ 6.Kg1 Qg2# >0:04 3/8 -Mate06 372690 1...Rxh3+ 2.gxh3 d4 3.Qc4+ Nxc4 > 4.Ra3 Qd5+ 5.Rf3 Qxf3+ 6.Kg1 Qg2# >0:07 4/9 -Mate06 751818 1...Rxh3+ 2.gxh3 d4 3.Qc4+ Nxc4 > 4.Ra3 Qd5+ 5.Rf3 Qxf3+ 6.Kg1 Qg2# > >jm -------------- This is very impressive by Tiger 14.0 as it retrieved the correct answer in less than a half a second and annonced Mate in 5 in 2.3 seconds! Using my old AMD K6-2, 266Mhz with 64 Ram. I used 8Mb for hash tables. 00:00:00.4 6.04 6 32967 Rxh3+ gxh3 d4 Kg1 Nf3+ Kf1 Rxd2+ Qc4+ Qxc4+ 00:00:00.9 6.94 7 50842 Rxh3+ 00:00:00.7 15.64 7 81787 Rxh3+ gxh3 d4 Qc5 Bxc5 Ra3 Qc6+ Rf3 Qxf3+ Kg1 Qxh3 00:00:01.8 16.54 8 109404 Rxh3+ 00:00:02.3 Mate in 5 8 217977 Rxh3+ gxh3 d4 Qc5 Bxc5 Ra3 Qc6+ Rf3 Qxf3+ Kg1 Qg2# Regards, Terry
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