Author: John Merlino
Date: 10:52:03 07/04/04
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On July 04, 2004 at 08:34:52, Rob Basham wrote: >Chess Tiger 14 >finds >Rxg7+ in just 10 seconds...P3/850 > >[D]2r1r1k1/1b4p1/pp6/8/Pn2N2P/1q5P/4Q2K/R1B3R1 w - - 0 1 > >This might be a forced mate in about 21, but not sure... > >Rob On a default CM9000 version of The King, it takes 1:58 on a P4-2.4 to find Rxg7+: Time Depth Score Positions Moves 0:00 1/3 3.80 5323 1.Nf6+ Kf8 2.Nxe8 Bf3 3.Rg3 Rc2 0:00 1/4 3.13 23942 1.Nf6+ Kf8 2.Nxe8 Rc3 3.Rf1+ Kg8 4.Qg4 Rc2+ 5.Kg1 Qc3 0:00 1/5 4.01 90589 1.Nf6+ Kf8 2.Nxe8 Bf3 3.Rf1 Rc2 4.Bd2 0:01 1/6 5.19 222831 1.Nf6+ Kf8 2.Nxe8 Bf3 3.Rf1 Rc2 4.Bd2 Rxd2 5.Qxd2 Kxe8 6.Rxf3 Qxf3 7.Qxb4 0:03 1/7 5.53 698154 1.Nf6+ Kf8 2.Nxe8 Bf3 3.Rf1 Rc2 4.Bd2 Rxd2 5.Qxd2 Kxe8 6.Rae1+ Kf7 7.Rxf3+ Qxf3 8.Qxb4 Qf2+ 9.Kh1 0:14 1/8 6.01 2830974 1.Nf6+ Kf8 2.Nxe8 Qc4 3.Rf1+ Kg8 4.Qxc4+ Rxc4 5.Bd2 Rc2 6.Rad1 Bc6 0:30 1/9 6.15 6629207 1.Nf6+ Kf8 2.Nxe8 Qc4 3.Qf2+ Kxe8 4.Re1+ Be4 5.Qf4 Kd7 6.Rxe4 Qc2+ 7.Bd2 Nd5 8.Qf5+ Kd6 1:31 1/10 6.45 20379205 1.Nf6+ Kf8 2.Nxe8 Bf3 3.Rf1 Rc2 4.Bd2 Kg8 5.Rxf3 Rxd2 6.Qxd2 Qxf3 7.Qxb4 Qe2+ 8.Kg1 Qxe8 9.Qxb6 1:58 1/10 8.64 27461530 1.Rxg7+ Kxg7 2.Qg4+ Kh8 3.Qh5+ Kg8 4.Qg6+ Kh8 5.Qh6+ Kg8 6.Bd2 Qg3+ 7.Nxg3 Nd5 8.Nf5 Re2+ 9.Kg3 Re7 10.Nxe7+ Nxe7 11.Qe6+ Kf8 12.Rf1+ Ke8 13.Qxb6 Using the same settings with the CMX000 version, it takes 1:31 -- almost a 25% improvement in speed! Time Depth Score Positions Moves 0:00 1/3 3.72 3187 1.Nf6+ Kf8 2.Nxe8 Nc2 3.Rf1+ Kg8 0:00 1/4 3.40 18526 1.Nf6+ Kf8 2.Nxe8 Rc3 3.Rf1+ Kg8 4.Qg4 Rc2+ 5.Kg1 0:00 1/5 4.13 91889 1.Nf6+ Kf8 2.Nxe8 Bf3 3.Rf1 Rc2 4.Bd2 0:01 1/6 4.40 200801 1.Nf6+ Kf8 2.Nxe8 Qd3 3.Rf1+ Kg8 4.Qxd3 Nxd3 5.Nd6 Rc2+ 6.Kg1 0:02 2/7 4.76 541228 1.Nf6+ Kf8 2.Nxe8 Qc4 3.Rf1+ Kg8 4.Qxc4+ Rxc4 5.Bd2 Rc2 6.Rad1 0:06 2/8 4.83 1339306 1.Nf6+ Kf8 2.Nxe8 Qc4 3.Qf2+ Kxe8 4.Re1+ Be4 5.Qg2 Qc7+ 6.Kh1 Qe5 7.Qxe4 0:18 2/9 5.40 3881248 1.Nf6+ Kf8 2.Nxe8 Qc4 3.Qf2+ Kxe8 4.Re1+ Be4 5.Qf3 Qc2+ 6.Re2 Nd5 7.Qxe4+ Qxe4 8.Rxe4+ Kd7 9.Bb2 1:04 3/10 6.16 13638813 1.Nf6+ Kf8 2.Nxe8 Qc4 3.Qf2+ Kxe8 4.Re1+ Be4 5.Qf4 Qc2+ 6.Bd2 Kd7 7.Rxe4 Nd5 8.Qf5+ Kd6 1:31 3/10 7.19 20112860 1.Rxg7+ Kxg7 2.Qg4+ Kh8 3.Qh5+ Kg8 4.Qg6+ Kh8 5.Qh6+ Kg8 6.Bd2 Rc1 7.Qg6+ Kh8 8.Qxe8+ Qg8 9.Qh5+ Qh7 10.Qxh7+ Kxh7 11.Rxc1 jm
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