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Subject: Re: Pawn endgame, solution correct?

Author: Dann Corbit

Date: 09:29:51 10/15/01

Go up one level in this thread


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?

Crafty:

EPD Kit revision date: 1996.04.21
unable to open book file [e:\crafty\release/books.bin].
hash table memory = 192M bytes.
pawn hash table memory = 80M bytes.
EGTB cache memory = 32M bytes.
draw score set to    0.00 pawns.
choose from book moves randomly (using weights.)
choose from 5 best moves.
book learning enabled
result learning enabled
position learning enabled
threshold set to 9 pawns.
5 piece tablebase files found
19045kb of RAM used for TB indices and decompression tables

Crafty v18.11

White(1): st 999
search time set to 999.00.
White(1): epdpfga \ape.epd ape.out
PFGA: EPD record: 1   ID: APE.704
end-game phase
              clearing hash tables
              time surplus   0.00  time limit 16:39 (16:39)
         nss  depth   time  score   variation (1)
               13->   0.18   0.37   1. Kd2 Kh5 2. Kd3 Kg5 3. Kd4 f4 4.
                                    gxf4+ Kxf4 5. Kd3 Ke5 6. Ke3 Kd5 7.
                                    Kxf3 Kc5 8. Ke4 Kxb5
               14     0.23   0.62   1. Kd2 Kf6 2. Ke3 Ke5 3. Kxf3 Kd5 4.
                                    Kf4 Kc5 5. Kxf5 Kxb5 6. g4 Kxc6 7.
                                    g5 Kd5
               14->   0.24   0.62   1. Kd2 Kf6 2. Ke3 Ke5 3. Kxf3 Kd5 4.
                                    Kf4 Kc5 5. Kxf5 Kxb5 6. g4 Kxc6 7.
                                    g5 Kd5
               15     0.28     ++   1. Kd2!!
               15->   0.59   1.01   1. Kd2 Kf6 2. Ke3 Ke5 3. Kxf3 Kd5 4.
                                    Kf4 Kc5 5. Kxf5 Kxb5 6. g4 Kxc6 7.
                                    g5 Kd5
               16     0.62     ++   1. Kd2!!
               16     0.76   2.02   1. Kd2 Kh5 2. Kd3 Kg5 3. Kd4 f4 4.
                                    g4 Kxg4 5. Ke5 Kg5 6. Ke6 Kg4 7. Kd7
                                    Kf5 8. Kxc7 Ke6
               16->   0.79   2.02   1. Kd2 Kh5 2. Kd3 Kg5 3. Kd4 f4 4.
                                    g4 Kxg4 5. Ke5 Kg5 6. Ke6 Kg4 7. Kd7
                                    Kf5 8. Kxc7 Ke6
               17     0.98     ++   1. Kd2!!
               17->   1.80   2.41   1. Kd2 Kh5 2. Kd3 Kg5 3. Kd4 f4 4.
                                    g4 Kxg4 5. Ke5 Kg5 6. Ke6 Kg4 7. Kd7
                                    Kf5 8. Kxc7 Ke6
               18     2.33     --   1. Kd2
               18     3.34   0.80   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. Kc6
                                    f1=Q 11. c8=Q
               18->   3.42   0.80   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. Kc6
                                    f1=Q 11. c8=Q
               19     3.54   0.80   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. Kc6
                                    f1=Q 11. c8=Q
               19     4.15   0.98   1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 4.
                                    Kxf3 Kc5 5. Kf4 Kxb5 6. Kxf5 Kxc6 7.
                                    g4 b5 8. g5 b4 9. g6 b3 10. Kf6 <HT>
               19->   4.18   0.98   1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 4.
                                    Kxf3 Kc5 5. Kf4 Kxb5 6. Kxf5 Kxc6 7.
                                    g4 b5 8. g5 b4 9. g6 b3 10. Kf6 <HT>
               20     4.72   0.61   1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 4.
                                    Kxf3 Kc5 5. Kf4 Kxb5 6. Kxf5 Kxc6 7.
                                    Ke6 b5 8. f4 b4 9. f5 b3 10. f6 b2
                                    11. f7 b1=Q 12. f8=Q
               20     5.05   0.65   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. c8=Q
                                    f1=Q 11. Qc3+ Kf4 12. Kc6
               20->   5.06   0.65   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. c8=Q
                                    f1=Q 11. Qc3+ Kf4 12. Kc6
               21     5.43   0.60   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. c8=Q
                                    f1=Q 11. Qc3+ Kg4 12. Qg7+ Kf3 13.
                                    Kc6
               21     6.52   0.61   1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 4.
                                    Kxf3 Kc5 5. Kf4 Kxb5 6. Kxf5 Kxc6 7.
                                    Ke6 b5 8. f4 b4 9. f5 b3 10. f6 b2
                                    11. f7 b1=Q 12. f8=Q <HT>
               21->   6.53   0.61   1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 4.
                                    Kxf3 Kc5 5. Kf4 Kxb5 6. Kxf5 Kxc6 7.
                                    Ke6 b5 8. f4 b4 9. f5 b3 10. f6 b2
                                    11. f7 b1=Q 12. f8=Q <HT>
               22     7.77     --   1. Kc2
               22    13.84  -0.15   1. Kc2 Kf6 2. Kd3 Ke5 3. Ke3 Kd5 4.
                                    Kf4 Kc5 5. Kxf5 Kxb5 6. g4 Kxc6 7.
                                    Kf4 Kd6 8. Kxf3 b5 9. g5 b4 10. g6
                                    b3 11. g7 b2 12. g8=Q b1=Q
               22    14.64     ++   1. Kd2!!
               22->  34.14   1.00   1. Kd2
               23    34.89   0.85   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. c8=Q
                                    f1=Q 11. Qc3+ Kg4 12. Kc6 Qh1+ 13.
                                    Kc5 Qb7 14. Qe5
               23->  35.99   0.85   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. c8=Q
                                    f1=Q 11. Qc3+ Kg4 12. Kc6 Qh1+ 13.
                                    Kc5 Qb7 14. Qe5
               24    37.18   0.70   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qe5+ Kf2 13.
                                    Kc5 Qa3+ 14. Kd5 Qf3+ 15. Kd4 f4
               24->  38.75   0.70   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qe5+ Kf2 13.
                                    Kc5 Qa3+ 14. Kd5 Qf3+ 15. Kd4 f4
               25    41.29   0.73   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qe5+ f4 13. Kc7
                                    Qe3 14. Qg5+ Kf3 15. b6 Ke4
               25->  43.73   0.73   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qe5+ f4 13. Kc7
                                    Qe3 14. Qg5+ Kf3 15. b6 Ke4
               26    48.72   0.60   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qg7+ Kh3 13.
                                    Qd4 Qe4 14. Kc5 Qe7+ 15. Kc4 <HT>
               26->  53.27   0.60   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qg7+ Kh3 13.
                                    Qd4 Qe4 14. Kc5 Qe7+ 15. Kc4 <HT>
               27     1:04   0.71   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qg7+ Qg4 13.
                                    Qe5+ Kf3 14. Qc3+ Ke4 15. Ka7 f4 16.
                                    Qc4+ Ke3 17. Qc5+ Ke4 18. b6
               27->   1:12   0.71   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qg7+ Qg4 13.
                                    Qe5+ Kf3 14. Qc3+ Ke4 15. Ka7 f4 16.
                                    Qc4+ Ke3 17. Qc5+ Ke4 18. b6
               28     1:34   0.73   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qg7+ Qg4 13.
                                    Qe5+ Kg2 14. Kc7 f4 15. Qd4 Qe2 16.
                                    Qg7+ Kf2 17. b6 Ke3
               28->   2:08   0.73   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qg7+ Qg4 13.
                                    Qe5+ Kg2 14. Kc7 f4 15. Qd4 Qe2 16.
                                    Qg7+ Kf2 17. b6 Ke3
               29     4:00   0.47   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qe5+ f4 13. Kc7
                                    Qe3 14. Qg5+ Kf2 15. b6 f3 16. Qh4+
                                    Ke2 17. Qc4+ Qd3 18. Qxd3+ Kxd3 19.
                                    Kc6
               29->   4:53   0.47   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qe5+ f4 13. Kc7
                                    Qe3 14. Qg5+ Kf2 15. b6 f3 16. Qh4+
                                    Ke2 17. Qc4+ Qd3 18. Qxd3+ Kxd3 19.
                                    Kc6
               30     8:18   0.34   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qe5+ Kg4 13.
                                    Ka7 Qa3+ 14. Kb7 Qb4 15. Qe2+ Kg3 16.
                                    Qd3+ Kg4 17. Kc6 Qe4+ 18. Qxe4+ fxe4
                                    19. Kc5 e3 20. b6
               30->   9:38   0.34   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. c8=Q
                                    f1=Q 11. Qc3+ Qf3 12. Qe5+ Kg4 13.
                                    Ka7 Qa3+ 14. Kb7 Qb4 15. Qe2+ Kg3 16.
                                    Qd3+ Kg4 17. Kc6 Qe4+ 18. Qxe4+ fxe4
                                    19. Kc5 e3 20. b6
              time=16:40  cpu=99%  mat=0  n=459352657  fh=86%  nps=459k
              ext-> chk=52965362 cap=1248069 pp=2828561 1rep=748338 mate=4529
              predicted=0  nodes=459352657  evals=133734570
              endgame tablebase-> probes done=141637  successful=141637
EG fault: a problem occurred during epdpfga processing
White(1):



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