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Subject: is this endgame position easy for most programs?

Author: Mike Byrne

Date: 22:26:57 11/12/04


White(2): [d]8/7p/1kP2K2/8/8/1p2p3/1P2P3/8 w - - ;bm Kg7 draws!
White(1): g
end-game phase
              clearing hash tables
              time surplus   0.28  time limit 1:00 (1:00)
              time surplus   0.28  time limit 1:00 (1:00)
              depth   time  score   variation (1)
                1     0.00  -2.83   1. Ke6 Kxc6
                1->   0.00  -2.83   1. Ke6 Kxc6
                2     0.00  -2.83   1. Ke6 Kxc6
                2     0.00     +1   1. Kg5!!
                2->   0.00  -3.23   1. Kg5
                3     0.00     +1   1. Kg5!!
                3     0.00     +3   1. Kg5!!
                3     0.00  -1.20   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7
                3->   0.02  -1.20   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7
                4     0.02  -1.20   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7
                4->   0.02  -1.20   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7
                5     0.02  -1.20   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7 Ke5
                5->   0.02  -1.20   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7 Ke5
                                    (s=3)
                6     0.02  -1.10   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7 Ke5
                                    4. Kg6 Kd4 (s=2)
                6->   0.04  -1.10   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7 Ke5
                                    4. Kg6 Kd4 (s=3)
                7     0.04  -0.90   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7 Kd4
                                    4. Kg6 Ke5 5. Kf7 (s=2)
                7->   0.05  -0.90   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7 Kd4
                                    4. Kg6 Ke5 5. Kf7 (s=3)
                8     0.05     -1   1. Kg5
                8     0.07  -2.50   1. Kg5 Kxc6 2. Kh6 Kd5 3. Kxh7 Ke4
                                    4. Kg6 Kf4 5. Kg7 Kg3 6. Kh7 Kf4 7.
                                    Kg6 (s=2)
                8     0.10  -2.41   1. Kf5 Kxc6 2. Ke4 Kd6 3. Kxe3 Ke5
                                    4. Kd3 h5 5. e4 <HT>
                8->   0.10  -2.41   1. Kf5 Kxc6 2. Ke4 Kd6 3. Kxe3 Ke5
                                    4. Kd3 h5 5. e4 <HT> (s=4)
                9     0.10  -2.41   1. Kf5 Kxc6 2. Ke4 Kd6 3. Kxe3 Ke5
                                    4. Kd3 h5 5. e4 (s=3)
                9->   0.13  -2.41   1. Kf5 Kxc6 2. Ke4 Kd6 3. Kxe3 Ke5
                                    4. Kd3 h5 5. e4 (s=3)
               10     0.18  -2.60   1. Kf5 Kxc6 2. Ke4 Kd6 3. Kd4 h5 4.
                                    Ke4 Ke6 5. Kf4 Kd5 <HT> (s=2)
               10     0.25  -2.44   1. Kg5 Kxc6 2. Kf4 Kd5 3. Kxe3 Ke5
                                    4. Kf3 h5 5. e3 Kf5 6. Ke2
               10->   0.25  -2.44   1. Kg5 Kxc6 2. Kf4 Kd5 3. Kxe3 Ke5
                                    4. Kf3 h5 5. e3 Kf5 6. Ke2 (s=3)
               11     0.32  -2.41   1. Kg5 Kxc6 2. Kf4 Kd5 3. Kxe3 Ke5
                                    4. Kf3 Kf5 5. e4+ Ke5 6. Ke3 h5 (s=2)
               11->   0.36  -2.41   1. Kg5 Kxc6 2. Kf4 Kd5 3. Kxe3 Ke5
                                    4. Kf3 Kf5 5. e4+ Ke5 6. Ke3 h5 (s=3)
               12     0.82  -2.41   1. Kg5 Kxc6 2. Kf4 Kd5 3. Kxe3 Ke5
                                    4. Kf3 Kf5 5. e4+ Ke5 6. Ke3 h5 7.
                                    Kd3 (s=2)
               12     0.97  -2.40   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3
               12->   0.97  -2.40   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3 (s=3)
               13     1.08     +1   1. Kg7!!
               13     1.30     +3   1. Kg7!!
               13     1.38  -1.10   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3 Ke4 <HT> (s=2)
               13->   1.54  -1.10   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3 Ke4 <HT> (s=3)
               14     1.94     +1   1. Kg7!!
               14     1.96  -0.90   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3 Ke5 9. Kf3 (s=2)
               14->   2.10  -0.90   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3 Ke5 9. Kf3 (s=5)
               15     2.44  -0.90   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3 Ke4 9. Kg4 Ke5 10. Kf3 (s=4)
               15->   2.85  -0.90   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3 Ke4 9. Kg4 Ke5 10. Kf3
               16     4.74     +1   1. Kg7!!
               16     6.41  -0.40   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3 Ke4 9. Kg4 Kd5 10. Kf5 Kc5
                                    11. Ke6
               16->   6.64  -0.40   1. Kg7 h5 2. Kf6 h4 3. Ke5 Kxc6 4.
                                    Kf4 Kd5 5. Kg4 Ke5 6. Kxh4 Kf4 7. Kh3
                                    Kf5 8. Kg3 Ke4 9. Kg4 Kd5 10. Kf5 Kc5
                                    11. Ke6
               17    10.88  -0.29   1. Kg7 h5 2. Kf6 h4 3. Ke5 h3 4. Kd6
                                    h2 5. c7 h1=Q 6. c8=Q Qd1+ 7. Ke6 Qxe2
                                    8. Qd8+ Kb5 9. Qd5+ Kb4 10. Qd6+ Ka5
                                    11. Qa3+ Kb5 12. Qxb3+ Kc5 13. Qa3+
                                    Kc6 14. Qa4+ Kb6 15. Qd4+ Kb5 16. b4
               17->  11.38  -0.29   1. Kg7 h5 2. Kf6 h4 3. Ke5 h3 4. Kd6
                                    h2 5. c7 h1=Q 6. c8=Q Qd1+ 7. Ke6 Qxe2
                                    8. Qd8+ Kb5 9. Qd5+ Kb4 10. Qd6+ Ka5
                                    11. Qa3+ Kb5 12. Qxb3+ Kc5 13. Qa3+
                                    Kc6 14. Qa4+ Kb6 15. Qd4+ Kb5 16. b4
               18    15.91  -0.28   1. Kg7 h5 2. Kf6 h4 3. Ke5 h3 4. Kd6
                                    h2 5. c7 h1=Q 6. c8=Q Qd1+ 7. Ke6 Qxe2
                                    8. Qd8+ Kb5 9. Qd5+ Kb4 10. Qd6+ Ka4
                                    11. Qa3+ Kb5 12. Qxb3+ Kc5 13. Qa3+
                                    Kc6 14. Qa8+ Kb5 15. Qb7+ Ka4 16. Qa7+
                                    Kb3 17. Qb6+ Kc2 18. b4
               18->  16.30  -0.28   1. Kg7 h5 2. Kf6 h4 3. Ke5 h3 4. Kd6
                                    h2 5. c7 h1=Q 6. c8=Q Qd1+ 7. Ke6 Qxe2
                                    8. Qd8+ Kb5 9. Qd5+ Kb4 10. Qd6+ Ka4
                                    11. Qa3+ Kb5 12. Qxb3+ Kc5 13. Qa3+
                                    Kc6 14. Qa8+ Kb5 15. Qb7+ Ka4 16. Qa7+
                                    Kb3 17. Qb6+ Kc2 18. b4
               19    28.49   0.00   1. Kg7 h5 2. Kf6 h4 3. Ke5 h3 4. Kd6
                                    h2 5. c7 h1=Q 6. c8=Q Qd1+ 7. Ke6 Qxe2
                                    8. Qd8+ Kb5 9. Qd5+ Kb4 10. Qd6+ Ka4
                                    11. Qd4+ Ka5 12. Qd8+ Kb4 13. Qd6+
               19->  31.68   0.00   1. Kg7 h5 2. Kf6 h4 3. Ke5 h3 4. Kd6
                                    h2 5. c7 h1=Q 6. c8=Q Qd1+ 7. Ke6 Qxe2
                                    8. Qd8+ Kb5 9. Qd5+ Kb4 10. Qd6+ Ka4
                                    11. Qd4+ Ka5 12. Qd8+ Kb4 13. Qd6+
?              20    31.68    1/8*  1. Kg7
White(1): ?
              time=34.50  cpu=160%  mat=0  n=35574867  fh=90%  nps=1.03M
              ext-> chk=4337377 cap=95607 pp=2766562 1rep=91324 mate=2566
              predicted=1  nodes=35574867  evals=14674170  50move=0
              endgame tablebase-> probes=632  hits=632
              SMP->  split=4998  stop=318  data=6/128  cpu=55.46  elap=34.50

White(1): Kg7
              time used:  34.50



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