Author: John Merlino
Date: 17:44:58 02/22/03
Go up one level in this thread
On February 22, 2003 at 19:58:16, Art Basham wrote: >Here the best move for white is Qh5...! > >[D]rn3k1r/p3n1pp/2p2p2/4N3/2Np4/8/q4PPP/1R1QR1K1 w - - 0 20 > >This is an 8 ply move for my old WChess program..found in over three minutes... > >Saitek RISC finds it in about 63 seconds... Apparently this is not a good test move for two reasons: 1) Finding Qh5 is probably very easy for any decent engine, as Chessmaster 9000 finds Qh5 instantly. 2) Rb7 is also a winning move! The King, playing a very good game of "PSYCHE!" on its user, switches to Rb7 in 69 seconds with a much higher eval, and eventually announces Mate in 13 with Rb7! But THEN it announces Mate in 10 with Qh5! And THEN it announces Mate in 9 with Qh5! [this analysis done on a P3-733, so divide search times by four for today's top single CPU boxes] Time Depth Score Positions Moves 0:00 1/3 1.24 5008 20.Qh5 fxe5 21.Qxe5 h6 22.Qxe7+ Kg8 0:00 1/4 2.68 15453 20.Qh5 g6 21.Nxg6+ hxg6 22.Qxh8+ Ng8 23.Rb7 0:00 1/5 5.11 54255 20.Qh5 fxe5 21.Qxe5 Nd7 22.Qxe7+ Kg8 23.Qe6+ Kf8 24.Qd6+ Kg8 25.Qxc6 Qxb1 26.Qd5+ Kf8 27.Rxb1 0:01 1/6 6.97 145689 20.Qh5 Qxc4 21.Nxc4 Nd7 22.Rb7 Ne5 23.Nxe5 fxe5 24.Qxe5 0:03 1/7 8.82 316794 20.Qh5 Qxc4 21.Nxc4 Nd7 22.Rb7 Rd8 23.Qa5 Re8 24.Rxd7 0:07 1/8 9.25 744241 20.Qh5 Qxc4 21.Nxc4 Nd7 22.Rb7 Rd8 23.Qe2 Nd5 24.Rxd7 Rb8 25.Rxa7 0:20 1/9 9.47 2336339 20.Qh5 Qxc4 21.Nxc4 Nd7 22.Rb7 Rd8 23.Qe2 Ne5 24.Nxe5 Re8 25.Nd7+ Kf7 26.Rxa7 1:09 1/9 13.75 7653360 20.Rb7 Qa1 21.Qxa1 fxe5 22.Qa3 Nd7 23.Rxd7 Re8 24.Qf3+ Kg8 25.Nd6 h6 26.Nxe8 1:46 1/10 15.41 11361728 20.Rb7 Qa1 21.Qxa1 fxe5 22.Qa3 Nd7 23.Rxd7 Re8 24.Qf3+ Kg8 25.Nd6 h6 26.Qf7+ Kh7 27.Nxe8 Rxe8 28.Qxe8 5:10 2/11 Mate13 36865911 20.Rb7 c5 21.Qg4 fxe5 22.Rxe7 Kxe7 23.Rxe5+ Kd8 24.Rd5+ Kc7 25.Rxc5+ Nc6 26.Qxg7+ Kb8 27.Rb5+ Kc8 28.Qb7+ Kd8 29.Rd5+ Ke8 30.Qd7+ Kf8 31.Rf5+ Kg8 32.Qf7# 6:39 2/11 Mate10 48587424 20.Qh5 Qxc4 21.Nxc4 Nd7 22.Rb7 Rd8 23.Nd6 Ne5 24.Rxe5 Ng6 25.Rbe7 fxe5 26.Rxa7 Rxd6 27.Qf5+ Ke8 28.Qf7+ Kd8 29.Ra8# 9:16 3/12 Mate09 69984580 20.Qh5 Qxc4 21.Nxc4 Nd7 22.Rb7 Rd8 23.Nd6 Ne5 24.Rxe5 Ng6 25.Qf5 Nxe5 26.Qe6 Nf3+ 27.gxf3 g6 28.Qf7# jm
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