Author: John Merlino
Date: 23:25:58 01/16/04
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On January 16, 2004 at 19:49:05, ALI MIRAFZALI wrote: >In this position which happened in a game between Hiarcs 8 running at 1800 MHZ >and the novag Handheld chess computer Sapphire(at 20 Mhz) ;Hiarcs 8 played >27...Qxh2? >Not noticing that after 28.Bxf7+! it is a Draw by perpetual check.Alas the >Sapphire could not find the move in the actual game. >[D]r5k1/5p1p/p5p1/1p3bR1/5P1q/1B6/PPP4P/1K1Q4 b >Questions: >1.Does your program play or consider 27..Qxh2? >2.How long does it for your program to see the draw score after 27..Qxh2? Chessmaster 9000, SKR personality on a P4-2.4, takes too long on this one: Time Depth Score Positions Moves 0:01 1/8 -1.38 245967 1...Re8 2.Rg1 Qxf4 3.Qd5 Rf8 4.Re1 Qxh2 5.Qd4 Qg3 6.Re7 0:01 1/8 -1.48 378688 1...Qxf4 2.Rg2 Re8 3.Bd5 Be4 4.Bxe4 Qxe4 5.Rd2 Qf4 0:03 1/8 -1.60 623761 1...Qxh2 2.Rg1 Rc8 3.Rf1 b4 4.Qc1 Qe2 5.Rd1 h5 0:05 1/9 -1.61 1228444 1...Qxh2 2.Rg1 Rc8 3.Rf1 h6 4.a4 bxa4 5.Bxa4 Be4 6.Bb3 0:06 1/9 -1.70 1501554 1...Re8 2.Rg1 Qxf4 3.Qd5 Rf8 4.Qg2 Be4 5.Qg3 Qxg3 6.hxg3 Rd8 0:11 1/10 -1.67 2587071 1...Re8 2.Rg1 Qxh2 3.Qd4 Re4 4.Qa7 Re7 5.Qd4 Rd7 6.Qe3 Be4 7.Re1 0:16 1/10 -1.84 3692723 1...Qxh2 2.Rg1 Rc8 3.Rf1 a5 4.a4 b4 5.Kc1 h5 6.Qd2 Qxd2+ 7.Kxd2 0:31 1/11 -1.96 7271671 1...Qxh2 2.Rg1 Rc8 3.Re1 a5 4.Re2 Qxf4 5.Qh1 Qd6 6.Bd5 h6 1:04 1/12 -1.99 15064767 1...Qxh2 2.Rg1 Rc8 3.Re1 a5 4.Re2 Qxf4 5.Qe1 a4 6.Bd5 h5 7.a3 Kg7 2:33 2/13 -2.06 36472375 1...Qxh2 2.Rg1 Rc8 3.Rf1 a5 4.a4 bxa4 5.Bxa4 Bh3 6.Re1 Qxf4 7.Bb3 a4 8.Bd5 Bf5 7:10 3/14 0.00 103276929 1...Qxh2 2.Rxf5 gxf5 3.Bxf7+ Kxf7 4.Qd5+ Kg7 5.Qd7+ Kg6 6.Qe6+ Kh5 7.Qxf5+ Kh4 8.Qxh7+ Kg3 9.Qd3+ Kg2 10.Qd5+ Kh3 11.Qd7+ Kg2 12.Qd5+ 9:22 3/14 -2.09 134140716 1...Re8 2.Rg1 Qxh2 3.Rf1 Qe2 4.Qc1 Kg7 5.Rd1 h5 6.Rd2 Qe3 7.Rd6 Re4 8.Bd5 Qxf4 9.Rxa6 So, it might be safe on a very strong CPU at tournament time controls, but will probably fall for this in blitz. jm
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