Author: Chessfun
Date: 02:16:48 01/17/04
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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? Hiarcs 8 on my machine switches away from Qxh2 in 36 seconds. XP 2600+ r5k1/5p1p/p5p1/1p3bR1/5P1q/1B6/PPP4P/1K1Q4 b - - 0 1 Analysis by Hiarcs 8: 1...Re8 2.Rg1 Qxf4 3.Rg2 Be4 4.Re2 Qf3 -+ (-1.86) Depth: 7/21 00:00:00 141kN 1...Re8 2.Rg1 -+ (-1.61) Depth: 8/23 00:00:01 401kN 1...Re8 2.Rg1 Qxf4 3.Qd5 Qc7 4.Qd2 -+ (-1.59) Depth: 8/25 00:00:02 502kN 1...Qxh2 2.Qd4 Rc8 3.Bxf7+ Kf8 4.Bb3 Bxc2+ 5.Ka1 Bxb3 6.axb3 -+ (-1.66) Depth: 8/27 00:00:03 823kN 1...Qxh2 2.Rg1 Rc8 3.Rf1 h5 4.a4 bxa4 5.Bxa4 Rc4 6.Bb3 Rxf4 -+ (-1.80) Depth: 9/30 00:00:07 1741kN 1...Qxh2 2.Bxf7+ -+ (-1.55) Depth: 10/32 00:00:21 5300kN 1...Qxh2 2.Bxf7+ Kf8 3.Bb3 Qxf4 4.Rg1 Rc8 5.Qd5 Bxc2+ 6.Bxc2 Rxc2 7.Qd8+ Kf7 8.Qd7+ Kg8 9.Rxg6+ µ (-0.84) Depth: 10/33 00:00:31 8051kN 1...Re8 2.Rg1 Qxh2 3.Qd4 a5 -+ (-1.69) Depth: 10/33 00:00:36 9190kN 1...Re8 2.Rg1 Qxh2 3.Qd4 a5 4.Qa7 Rf8 5.a4 bxa4 6.Bxa4 Rc8 7.Rc1 Qxf4 8.Qxa5 -+ (-1.76) Depth: 11/36 00:01:09 17050kN Ruffian Leiden never considers Qxh2. New game r5k1/5p1p/p5p1/1p3bR1/5P1q/1B6/PPP4P/1K1Q4 b - - 0 1 Analysis by Ruffian Leiden2003: 1...Qxf4 µ (-1.03) Depth: 1/1 00:00:00 1...Qxf4 2.Qh5 µ (-0.76) Depth: 2/7 00:00:00 1...Qxf4 2.Rg3 Re8 -+ (-1.43) Depth: 3/11 00:00:00 1...Qxf4 2.Rg3 Re8 3.Bd5 µ (-1.11) Depth: 4/11 00:00:00 1...Re8 2.Rg1 Qxh2 3.Qd4 Re2 4.Rc1 µ (-1.21) Depth: 4/11 00:00:00 1...Re8 2.Rg1 Qxh2 3.Qd4 Re2 4.Rc1 -+ (-1.81) Depth: 5/14 00:00:00 1...Re8 2.Rg1 Qxh2 3.Qd4 Re2 4.Qd8+ Kg7 -+ (-1.54) Depth: 6/15 00:00:00 47kN 1...Re8 2.Rg1 Qxh2 3.Re1 Be4 4.Qc1 h5 -+ (-1.42) Depth: 7/17 00:00:00 138kN 1...Re8 2.Rg1 Qxh2 3.Re1 Rxe1 4.Qxe1 Bd7 5.Qd1 Bf5 -+ (-1.44) Depth: 8/19 00:00:00 333kN 1...Re8 2.Rg1 Qxh2 3.Re1 Rxe1 4.Qxe1 Be4 5.Qc1 Qe2 6.Ka1 -+ (-1.62) Depth: 9/21 00:00:00 678kN 1...Re8 2.Rg1 Qxh2 3.Re1 Re4 4.Rxe4 Bxe4 5.Qd8+ Kg7 6.Qd4+ Kh6 7.Qe3 Qh1+ 8.Qc1 Qxc1+ 9.Kxc1 -+ (-1.56) Depth: 10/24 00:00:01 1490kN 1...Re8 2.Rg1 Qxh2 3.Re1 Rxe1 4.Qxe1 Be4 5.Qe3 Qh1+ 6.Qc1 Qxc1+ 7.Kxc1 h5 8.Kd2 h4 -+ (-1.70) Depth: 11/27 00:00:02 3311kN 1...Re8 2.Rg1 Qxh2 3.Re1 Rxe1 4.Qxe1 Be4 5.Qe3 h5 6.a3 Qh1+ 7.Ka2 h4 8.Qd4 -+ (-1.68) Depth: 12/31 00:00:05 7019kN 1...Re8 2.Rg1 Qxh2 3.Re1 Rxe1 4.Qxe1 Be4 5.Qe3 h5 6.a3 Qh1+ 7.Ka2 Qf3 8.Qd2 h4 -+ (-1.76) Depth: 13/33 00:00:17 24713kN 1...Re8 2.Rg1 Qxh2 3.Re1 Rxe1 4.Qxe1 Be4 5.Qe3 h5 6.a3 Qg2 7.Ka2 Bd5 8.Qe8+ Kh7 9.Qe5 Bxb3+ 10.Kxb3 -+ (-1.74) Depth: 14/35 00:00:33 48023kN >2.How long does it for your program to see the draw score after 27..Qxh2? Ruffian Leiden considers nothing except Bxf7+ getting to a draw score in 9 secs. New game r5k1/5p1p/p5p1/1p3bR1/5P2/1B6/PPP4q/1K1Q4 w - - 0 1 Analysis by Ruffian Leiden2003: 2.Bxf7+ Kxf7 3.Qd5+ Kf6 4.Qxa8 Qxc2+ = (0.06) Depth: 1/7 00:00:00 2.Bxf7+ Kf8 3.Bd5 Rd8 4.b3 Qxf4 ³ (-0.66) Depth: 2/10 00:00:00 2.Bxf7+ Kf8 3.Rxf5 gxf5 4.Qd5 µ (-1.00) Depth: 3/10 00:00:00 2.Bxf7+ Kf8 3.Rxf5 gxf5 4.Qd6+ Kg7 5.Be6 µ (-0.78) Depth: 4/13 00:00:00 2.Bxf7+ Kf8 3.Rxf5 gxf5 4.Qd6+ Kg7 5.Qe5+ Kxf7 6.Qd5+ Ke7 7.Qxa8 Qxf4 8.Qxa6 µ (-1.04) Depth: 5/17 00:00:00 2.Bxf7+ Kxf7 3.Rxf5+ gxf5 4.Qd7+ Kg6 5.Qe6+ Kh5 6.Qxf5+ Kh4 7.Qxh7+ Kg3 8.Qe4 Qg1+ µ (-1.38) Depth: 6/18 00:00:00 93kN 2.Bxf7+ Kxf7 3.Rxf5+ gxf5 4.Qd7+ Kg6 5.Qe6+ Kh5 6.Qxf5+ Kh4 7.Qxh7+ Kg3 8.Qd3+ Kg4 9.Qe4 Qg1+ µ (-1.38) Depth: 7/22 00:00:00 199kN 2.Bxf7+ Kxf7 3.Rxf5+ gxf5 4.Qd7+ Kg6 5.Qe6+ Kg7 6.Qe7+ Kg8 7.Qe6+ Kf8 8.Qf6+ Ke8 9.Qe6+ Kd8 10.Qg8+ Ke7 11.Qxa8 Qxf4 12.Qxa6 Qf1# µ (-1.04) Depth: 8/26 00:00:00 574kN 2.Bxf7+ Kxf7 3.Rxf5+ gxf5 4.Qd7+ Kg6 5.Qe6+ Kg7 6.Qe7+ Kg8 7.Qe6+ Kf8 8.Qf6+ Ke8 9.Qe6+ Kd8 10.Qg8+ Ke7 11.Qxa8 Qxf4 12.Qxa6 Qf1# µ (-1.04) Depth: 9/26 00:00:01 1461kN 2.Bxf7+ Kxf7 3.Rxf5+ gxf5 4.Qd7+ Kg6 5.Qe6+ Kh5 6.Qxf5+ Kh4 7.Qxh7+ Kg3 8.Qd3+ Kg4 9.Qd7+ Kf3 10.Qd5+ Ke3 11.Qc5+ Ke2 12.Qd4 Qh1+ µ (-1.04) Depth: 10/31 00:00:02 2603kN 2.Bxf7+ ³ (-0.69) Depth: 11/31 00:00:04 5364kN 2.Bxf7+ Kxf7 3.Rxf5+ gxf5 4.Qd7+ Kg6 5.Qe6+ Kh5 6.Qxf5+ Kh4 7.Qxh7+ Kg3 8.Qd3+ Kg4 9.Qd7+ Kf3 10.Qd3+ Kf2 11.Qd2+ Kg1 12.Qd1+ Kf2 13.Qd2+ = (0.00) Depth: 11/33 00:00:09 12627kN 2.Bxf7+ Kxf7 3.Rxf5+ gxf5 4.Qd7+ Kg6 5.Qe6+ Kh5 6.Qxf5+ Kh4 7.Qxh7+ Kg3 8.Qd3+ Kg4 9.Qd7+ Kf3 10.Qd3+ Kf2 11.Qd2+ Kg1 12.Qd1+ Kf2 13.Qd2+ = (0.00) Depth: 12/34 00:00:14 19140kN 2.Bxf7+ Kxf7 3.Rxf5+ gxf5 4.Qd7+ Kg6 5.Qe6+ Kh5 6.Qxf5+ Kh4 7.Qxh7+ Kg3 8.Qd3+ Kg4 9.Qd7+ Kf3 10.Qd3+ Kf2 11.Qd2+ Kg1 12.Qd1+ Kf2 13.Qd2+ = (0.00) Depth: 13/39 00:00:24 33037kN 2.Bxf7+ Kxf7 3.Rxf5+ gxf5 4.Qd7+ Kg6 5.Qe6+ Kh5 6.Qxf5+ Kh4 7.Qxh7+ Kg3 8.Qd3+ Kg4 9.Qd7+ Kf3 10.Qd3+ Kf2 11.Qd2+ Kg1 12.Qd1+ Kf2 13.Qd2+ = (0.00) Depth: 14/41 00:00:49 66132kN
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