Author: John Merlino
Date: 13:18:22 10/03/02
Go up one level in this thread
On October 03, 2002 at 15:40:24, José Antônio Fabiano Mendes wrote: > [D]6R1/8/8/8/1k1K4/8/1p4p1/8 w J.E.Peckover === Szachy 1960 > 1. Kd5!! Kb3 2. Rg3+ Ka4 3. Rg4+ Ka5 4. Rg8 Kb5 5. Rg7! Kb6 6. Rg6+ Kc7 > 7. Rg7+ Kd8 8. Kd6 Kc8 9. Kc6 Kb8 10. Rg8+ Ka7 11. Rg7+ Ka6 12. Rg8 Ka5 > 13. Kc5 Ka4 14. Rg4+ Draw > Here is a good position to test your program (without tablebases, of course). > By the way, 1. Kd5!! is the only move which leads to a draw. JAFM Chessmaster 9000, without tablebases on a P3-600, finds Kd5 in three seconds: Time Depth Score Positions Moves 0:00 1/3 0.18 1995 1.Rg7 Kb3 2.Rg3+ Ka2 3.Rxg2 0:00 1/4 0.10 4658 1.Rg7 Kb3 2.Rb7+ Kc2 3.Rc7+ Kd2 0:00 1/5 -0.04 10733 1.Rg7 Kb3 2.Ke3 b1=Q 3.Rb7+ Kc2 4.Rxb1 Kxb1 0:00 1/5 0.00 12445 1.Ke3 Kb3 2.Rb8+ Kc2 3.Rc8+ Kd1 4.Rd8+ Kc2 5.Rc8+ 0:00 2/6 0.00 21088 1.Ke3 Kb3 2.Rb8+ Kc2 3.Kf2 g1=Q+ 4.Kxg1 b1=Q+ 5.Rxb1 Kxb1 0:00 3/7 0.00 33909 1.Ke3 Kb3 2.Rb8+ Kc2 3.Kf2 g1=Q+ 4.Kxg1 b1=Q+ 5.Rxb1 Kxb1 0:00 4/8 0.00 53965 1.Ke3 Kb3 2.Rb8+ Kc2 3.Kf2 g1=Q+ 4.Kxg1 b1=Q+ 5.Rxb1 Kxb1 0:01 5/9 -1.95 148583 1.Ke3 Kc5 2.Rc8+ Kb6 3.Rg8 Kc7 4.Rg7+ Kd6 5.Rg6+ Ke5 6.Rg5+ Kf6 7.Rxg2 b1=Q 0:02 5/9 -1.90 216111 1.Rb8+ Ka5 2.Rg8 Ka6 3.Rg6+ Kb7 4.Rg7+ Kc8 5.Rg8+ Kd7 6.Kd5 b1=Q 7.Rg7+ Kd8 8.Rxg2 0:03 5/9 0.00 275496 1.Kd5 Kb3 2.Rg3+ Ka4 3.Rg4+ Kb3 4.Rg3+ 0:03 6/10 0.00 319091 1.Kd5 Kb3 2.Rg3+ Ka4 3.Rg4+ Kb3 4.Rg3+ 0:04 7/11 0.00 479212 1.Kd5 Kb3 2.Rg3+ Ka4 3.Rg4+ Kb3 4.Rg3+ 0:07 8/12 0.00 742139 1.Kd5 Kb3 2.Rg3+ Ka4 3.Rg4+ Kb3 4.Rg3+ 0:12 9/13 0.00 1298698 1.Kd5 Kb3 2.Rg3+ Ka4 3.Rg4+ Kb3 4.Rg3+ jm
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