Author: Rafael Andrist
Date: 09:52:32 10/15/01
Go up one level in this thread
On October 15, 2001 at 12:08:18, Dann Corbit wrote: >On October 15, 2001 at 10:22:09, Rafael Andrist wrote: > >>[D]8/2p5/1pP3k1/1P3p2/8/5pP1/5P2/3K4 w - - bm Kc2; id "APE.704"; c0 "M. Sinar, >>1983"; >> >>According to M. Sinar, White wins with Kc2. But after analyzing the position >>with chess programs (without TBs), I could not find a winning line. The score >>swaps between +2 and 0. What do other programs say? > >ChessMaster: > >Time Depth Score Positions Moves > >0:00 15/16 2.12 63842 1. Kc2 Kh5 2. Kd3 Kg5 3. Kd4 f4 > 4. gxf4+ Kxf4 5. Kd3 Kg5 6. Ke3 > Kg4 7. Ke4 Kg5 8. Kxf3 Kf5 9. Ke3 > Ke5 >0:00 17/18 1.72 225673 1. Kd2 Kg5 2. Kd3 Kh5 3. Kd4 Kg5 > 4. Ke5 Kg4 5. Ke6 Kh3 6. Kd7 Kg2 > 7. Kxc7 Kxf2 8. Kxb6 Kxg3 9. c7 > f2 10. Kc5 f1=Q 11. c8=Q >0:01 19/20 1.43 377296 1. Kc2 Kg5 2. Kd2 f4 3. gxf4+ Kxf4 > 4. Kd3 Ke5 5. Ke3 Kd5 6. Kxf3 Kc5 > 7. Ke4 Kxb5 8. Kd5 Ka4 9. Ke6 b5 > 10. Kd7 b4 11. Kxc7 >0:02 20/21 1.74 573123 1. Kc2 Kg5 2. Kd2 f4 3. gxf4+ Kxf4 > 4. Kd3 Ke5 5. Ke3 Kd5 6. Kxf3 Kc5 > 7. Ke4 Kxb5 8. Kd5 Ka4 9. Ke6 b5 > 10. Kd7 b4 11. Kxc7 b3 12. Kd7 >0:03 21/22 1.31 847361 1. Kc2 Kg5 2. Kd3 Kh5 3. Kd4 Kg5 > 4. Ke5 Kg4 5. Ke6 Kh3 6. Kd7 Kg2 > 7. Kxc7 Kxf2 8. Kxb6 Kxg3 9. c7 > f2 10. c8=Q f1=Q 11. Qc3+ Kf4 12. > Qd4+ Kg3 13. Qe3+ Kg4 14. Kc5 f4 >0:07 22/23 1.04 1698333 1. Kc2 Kg5 2. Kd2 f4 3. gxf4+ Kxf4 > 4. Kd3 Ke5 5. Ke3 Kd5 6. Kxf3 Kc5 > 7. Ke4 Kxb5 8. Kd5 Ka5 9. f4 b5 > 10. f5 b4 11. Kd4 Ka4 12. f6 b3 >0:37 23/24 2.82 7867145 1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 > 4. Kf4 Kc4 5. Kxf5 Kd3 6. Ke6 Ke2 > 7. Kd7 Kxf2 8. Kxc7 Kxg3 9. Kxb6 > f2 10. c7 f1=Q 11. c8=Q Qd3 12. > Qb8+ Kf3 13. Qe5 Qd8+ 14. Qc7 Qd4+ > 15. Ka5 Ke4 >1:13 24/25 2.95 14639920 1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 > 4. Kf4 Kc4 5. Kxf5 Kd3 6. Ke6 Ke2 > 7. Kd7 Kxf2 8. Kxc7 Kxg3 9. Kxb6 > f2 10. c7 f1=Q 11. c8=Q Qd3 12. > Ka6 Qa3+ 13. Kb7 Qf3+ 14. Qc6 Qf4 > 15. b6 >3:07 25/26 3.01 36679784 1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 > 4. Kf4 Kc4 5. Kxf5 Kd3 6. Ke6 Ke2 > 7. Kd7 Kxf2 8. Kxc7 Kxg3 9. Kxb6 > f2 10. c7 f1=Q 11. c8=Q Qb1 12. > Qc7+ Kf2 13. Qc6 Qa2 14. Kb7 Qf7+ > 15. Qc7 Qf3+ 16. Ka6 >9:44 26/27 3.12 111641888 1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 > 4. Kf4 Kc4 5. Kxf5 Kd3 6. Ke6 Ke2 > 7. Kd7 Kxf2 8. Kxc7 Kxg3 9. Kxb6 > f2 10. c7 f1=Q 11. c8=Q Qe2 12. > Qg8+ Kh4 13. Ka6 Kh5 14. Qd5+ Kg4 > 15. Qd7+ Kf4 16. Qc7+ Thanks for posting these analyses, Dann. The position after 9.Kxb6 is drawn. After comparing your output of Yace and Crafty and the one of Wilhelm, I suspect that the solution of Sinar is wrong. There are also some other composed pawn endgames by Sinar which are wrong, that's why I don't trust him very much. Rafael B. Andrist
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