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Subject: Re: Which program finds this one?

Author: Dann Corbit

Date: 04:56:35 12/19/00

Go up one level in this thread


On December 19, 2000 at 04:30:31, Harald Faber wrote:

>[D]8/6KP/2r1k3/8/p7/P7/1P5P/8 b - - 0 0
>
>Test your progs with and without TBs. Which prog needs how long to see that this
>is not a draw but black wins?

Crafty sees an advantage in less than a second, but fails to find a checkmate
after a lengthy search.

Crafty v17.14

White(1): 2000
Illegal move (ambiguous): 2000
White(1): st 2000
search time set to 2000.00.
White(1): epdpfga epd.epd epd.out
PFGA: EPD record: 1
end-game phase
              clearing hash tables
              time surplus   0.00  time limit 33:20 (33:20)
         nss  depth   time  score   variation (1)
               11     0.12   0.00   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rc7+
               11->   0.17   0.00   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rc7+
               12     0.23   0.00   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rc7+
               12->   0.25   0.00   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rc7+
               13     0.30   0.00   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rc7+
               13->   0.33   0.00   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rc7+
               14     0.72     ++   1. ... Rc7+!!
               14     3.96   0.60   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. h4 Ke7 5. h5 Ke8 6. Kg6 Kd7 7. Kg7
                                    Ke7 <HT>
               14->   3.98   0.60   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. h4 Ke7 5. h5 Ke8 6. Kg6 Kd7 7. Kg7
                                    Ke7 <HT>
               15     4.26   0.59   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kd7 7.
                                    Kg7 Ke7 8. Kg6 Rf8 9. Kg7 Rf7+ 10.
                                    Kg8
               15->   4.30   0.59   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kd7 7.
                                    Kg7 Ke7 8. Kg6 Rf8 9. Kg7 Rf7+ 10.
                                    Kg8
               16     5.34     ++   1. ... Rc7+!!
               16->  23.88   0.98   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kd7 7.
                                    Kg7 Ke7 8. Kg6 Rf8 9. Kg7 Rf7+ 10.
                                    Kg8
               17    25.17     ++   1. ... Rc7+!!
               17->   1:09   1.37   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kd7 7.
                                    Kg7 Ke7 8. Kg6 Rf8 9. Kg7 Rf7+ 10.
                                    Kg8
               18     1:10     --   1. ... Rc7+
               18     1:38   1.30   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. h4 Ke7 5. Kg6 Kf8 6. h5 Ke8 7. Kg7
                                    Ke7 8. Kg6 Kf8 9. h6 Ke8 10. Kf6 Rxh7
                                    11. Kg6 Re7
               18->   1:38   1.30   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. h4 Ke7 5. Kg6 Kf8 6. h5 Ke8 7. Kg7
                                    Ke7 8. Kg6 Kf8 9. h6 Ke8 10. Kf6 Rxh7
                                    11. Kg6 Re7
               19     1:45   0.95   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kf8 7.
                                    h3 Ke8 8. Kg7 Ke7 9. Kg6 Kd6 10. Kg7
                                    Ke6 11. Kg6 Kd5 12. Kg7
               19->   1:45   0.95   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kf8 7.
                                    h3 Ke8 8. Kg7 Ke7 9. Kg6 Kd6 10. Kg7
                                    Ke6 11. Kg6 Kd5 12. Kg7
               20     1:54     ++   1. ... Rc7+!!
               20->  27:56   1.34   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kf8 7.
                                    h3 Ke8 8. Kg7 Ke7 9. Kg6 Kd6 10. Kg7
                                    Ke6 11. Kg6 Kd5 12. Kg7
               21    28:16   1.40   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kf8 7.
                                    h3 Ke7 8. Kg7 Ke8 9. Kg6 Kf8 10. h4
                                    Ke8 11. Kg7 Ke7 12. Kg6 Kf8 <HT>
               21->  28:17   1.40   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kf8 7.
                                    h3 Ke7 8. Kg7 Ke8 9. Kg6 Kf8 10. h4
                                    Ke8 11. Kg7 Ke7 12. Kg6 Kf8 <HT>
               22    28:42   1.40   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kf8 7.
                                    h3 Ke7 8. Kg7 Ke8 9. Kg6 Kf8 10. h4
                                    Ke8 11. Kg7 Ke7 12. Kg6 Ke6 13. h5
                                    Kd5
               22->  28:42   1.40   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kf8 7.
                                    h3 Ke7 8. Kg7 Ke8 9. Kg6 Kf8 10. h4
                                    Ke8 11. Kg7 Ke7 12. Kg6 Ke6 13. h5
                                    Kd5
               23    30:09   1.40   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kf8 7.
                                    h3 Ke7 8. Kg7 Ke8 9. Kg6 Kf8 10. h4
                                    Ke8 11. Kg7 Ke7 12. Kg6 Ke6 13. h5
                                    Ke7 <HT>
               23->  30:11   1.40   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kf8 7.
                                    h3 Ke7 8. Kg7 Ke8 9. Kg6 Kf8 10. h4
                                    Ke8 11. Kg7 Ke7 12. Kg6 Ke6 13. h5
                                    Ke7 <HT>
               24    32:02   1.17   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kd7 7.
                                    Kg7 Ke7 8. h4 Ke8 9. h5 Ke7 10. Kg6
                                    Kf8 11. h6 Ke8 12. Kg7 Ke7 13. Kg6
                                    Kf8 14. Kf6 Rxh7
               24->  32:03   1.17   1. ... Rc7+ 2. Kg8 Rc8+ 3. Kg7 Rh8
                                    4. Kg6 Ke7 5. Kg7 Ke8 6. Kg6 Kd7 7.
                                    Kg7 Ke7 8. h4 Ke8 9. h5 Ke7 10. Kg6
                                    Kf8 11. h6 Ke8 12. Kg7 Ke7 13. Kg6
                                    Kf8 14. Kf6 Rxh7
              time=33:20  cpu=99%  mat=2  n=1300296375  fh=15%  nps=649901
              ext-> checks=182958404 recaps=489006 pawns=4003086 1rep=9157749
thrt:23083
              predicted=0  nodes=1300296375  evals=20394103
              endgame tablebase-> probes done=609026  successful=193315
              hashing-> trans/ref=5%  pawn=2%  used=99%




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