Author: John Merlino
Date: 11:16:13 06/18/02
Go up one level in this thread
On June 18, 2002 at 12:30:13, Charlie GOLD wrote: > Here is a position that I gave to Fritz 6. After 7 minutes on infinite it >only comes up with Rxf4. I believe that Rxh5 leads to a win. > [D] 4r1k1/qp1r1p2/2pb1Bp1/p6p/2PP1n1R/1P3P2/P4P2/2Q2K1R w 0 1 Guess what, folks. Qxf4 is the best move!!! Chessmaster 9000 announces Mate in 10 for Qxf4 in 25 seconds on a PIII-600: Time Depth Score Positions Moves 0:00 1/3 -1.80 2438 1.Rxf4 Bxf4 2.Qxf4 Re6 3.Be5 b6 0:00 1/4 -1.26 7609 1.Rxf4 Bxf4 2.Qxf4 Re6 3.Be5 Kh7 4.Qg5 0:00 2/5 -1.26 24204 1.Rxf4 Bxf4 2.Qxf4 Re6 3.Be5 Kh7 4.Qg5 0:02 2/6 -1.43 113961 1.Rxf4 Re6 2.Rf5 Rxf6 3.Rxf6 Qxd4 4.Qg5 Be5 0:02 2/6 1.34 148059 1.Rxh5 gxh5 2.Qxf4 Re1+ 3.Kxe1 Re7+ 4.Be5 Bxe5 5.Qg5+ Kf8 6.dxe5 0:03 3/7 2.28 229134 1.Rxh5 gxh5 2.Qxf4 Re1+ 3.Kxe1 Re7+ 4.Be5 Bxe5 5.dxe5 Rd7 6.Qg5+ Kf8 7.Rxh5 0:11 3/8 9.09 789648 1.Rxh5 gxh5 2.Qxf4 Re1+ 3.Kxe1 Re7+ 4.Kf1 Re1+ 5.Kxe1 Bb4+ 6.Kf1 Kf8 7.Rxh5 0:15 3/8 13.43 1118477 1.Qxf4 Re1+ 2.Kxe1 Bxf4 3.Rxh5 Re7+ 4.Kf1 Re1+ 5.Kxe1 Bd2+ 6.Kxd2 gxh5 7.Rxh5 Qxd4+ 8.Bxd4 Kf8 9.Rxa5 Ke7 0:25 4/9 Mate10 2173987 1.Qxf4 Re1+ 2.Kg2 Rg1+ 3.Kxg1 Qc5 4.Rxh5 gxh5 5.Qh6 Qg5+ 6.Qxg5+ Kf8 7.Qg8+ Kxg8 8.Rxh5 Bh2+ 9.Rxh2 Kf8 10.Rh8# 0:31 4/10 Mate10 2759618 1.Qxf4 Re1+ 2.Kg2 Rg1+ 3.Kxg1 Qc5 4.Rxh5 gxh5 5.Qh6 Qg5+ 6.Qxg5+ Kf8 7.Qg8+ Kxg8 8.Rxh5 Bh2+ 9.Rxh2 Kf8 10.Rh8# 0:45 5/11 Mate10 4504935 1.Qxf4 Re1+ 2.Kg2 Rg1+ 3.Kxg1 Qc5 4.Rxh5 gxh5 5.Qh6 Qg5+ 6.Qxg5+ Kf8 7.Qg8+ Kxg8 8.Rxh5 Bh2+ 9.Rxh2 Kf8 10.Rh8# Note that this is a shorter mate than any other engine has announced, and faster too. Additionally, after forcing 1.Rxh5, it appears that this move leads to Mate in 11, one move longer than 1.Qxf4: Time Depth Score Positions Moves 0:00 1/3 -3.28 2537 1...gxh5 2.Rxh5 Re1+ 3.Kxe1 Nxh5 4.Qg5+ Kf8 5.Qxh5 0:00 1/4 -3.35 7089 1...gxh5 2.Rxh5 Re1+ 3.Kxe1 Nxh5 4.Qg5+ Kf8 5.Qxh5 Ke8 0:00 2/5 -3.09 15678 1...gxh5 2.Rxh5 Re1+ 3.Kxe1 Nxh5 4.Qg5+ Kf8 5.Qxh5 Bb4+ 6.Kf1 Ke8 0:00 2/6 1.34 36917 1...gxh5 2.Qxf4 Re1+ 3.Kxe1 Re7+ 4.Be5 Bxe5 5.Qg5+ Kf8 6.dxe5 0:01 3/7 2.28 86802 1...gxh5 2.Qxf4 Re1+ 3.Kxe1 Re7+ 4.Be5 Bxe5 5.dxe5 Rd7 6.Qg5+ Kf8 7.Rxh5 0:02 3/8 2.22 187299 1...gxh5 2.Qxf4 Re1+ 3.Kxe1 Re7+ 4.Be5 Bxe5 5.dxe5 Qc5 6.Qg5+ Kf8 7.Rxh5 0:05 4/9 16.55 466827 1...gxh5 2.Qxf4 Re1+ 3.Kxe1 Re7+ 4.Kf1 Re1+ 5.Kxe1 Bb4+ 6.Kd1 Kf8 7.Re1 Qxd4+ 8.Qxd4 0:23 4/10 Mate09 2147897 1...gxh5 2.Qxf4 Re1+ 3.Kg2 Rg1+ 4.Kxg1 Qc5 5.Qh6 Qg5+ 6.Qxg5+ Kf8 7.Rxh5 Ke8 8.Rh8+ Bf8 9.Qe5+ Re7 10.Qxe7# 0:50 4/10 Mate11 4833997 1...Re1+ 2.Kxe1 gxh5 3.Qxf4 Re7+ 4.Kf1 Qxd4 5.Rxh5 Re1+ 6.Kxe1 Bb4+ 7.Ke2 Qb2+ 8.Bxb2 Kf8 9.Rh8+ Ke7 10.Bf6+ Kd7 11.Rd8+ Ke6 12.Qe5# 1:33 5/11 Mate10 9953817 1...Re1+ 2.Kxe1 gxh5 3.Qxf4 Bb4+ 4.Kf1 Rxd4 5.Rxh5 Rd1+ 6.Kg2 Qxf2+ 7.Kxf2 Bc5+ 8.Ke2 Re1+ 9.Kxe1 Bb4+ 10.Kf1 Kf8 11.Rh8# 4:01 6/12 Mate10 27591934 1...Re1+ 2.Kxe1 gxh5 3.Qxf4 Bb4+ 4.Kf1 Rxd4 5.Rxh5 Rd1+ 6.Kg2 Qxf2+ 7.Kxf2 Bc5+ 8.Ke2 Re1+ 9.Kxe1 Bb4+ 10.Kf1 Kf8 11.Rh8# jm
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