Author: Bernhard Bauer
Date: 05:59:28 05/11/04
Older versions of Crafty had no problem solving the following position:
[D]2k/8/3K/1p/p/P/1B/8 w
Crafty 19.4 took about 15 sec on an AMD 1800 MHz to report a mate in 20.
Crafty 19.13 gives
22-> 36.66 6.92 1. Kc6 Kd8 2. Kxb5 Kc7 3. Kxa4 Kb7
4. Kb5 Ka7 5. Bd4+ Kb7 6. Ka5 Kc6 7.
Bb2 Kc5 8. Bh8 Kc4 9. Bd4 Kxd4 10.
Kb6 Kd3 11. Kb5 Kc2 12. a4
23 53.61 6.89 1. Kc6 Kd8 2. Kxb5 Kc7 3. Kxa4 Kb7
4. Kb5 Ka7 5. Bd4+ Kb7 6. Ka5 Kc6 7.
Bb2 Kc5 8. Bh8 Kc4 9. Bc3 Kxc3 10.
a4 Kc4 11. Kb6 Kb3 12. a5 Kc3
23 1:16 +1 1. Bf6!!
23 1:17 8.07 1. Bf6 Kb7 2. Bd4 Kc8 3. Bb6 Kb7 4.
Kc5 b4 5. axb4 a3 6. Bd8 Kc8 7. Bf6
Kc7 8. Be5+ Kd8 9. Kc6 Ke7 10. b5 Ke6
11. b6 Kxe5 12. b7 Kd4 13. b8=Q
23-> 1:20 8.07 1. Bf6 Kb7 2. Bd4 Kc8 3. Bb6 Kb7 4.
Kc5 b4 5. axb4 a3 6. Bd8 Kc8 7. Bf6
Kc7 8. Be5+ Kd8 9. Kc6 Ke7 10. b5 Ke6
11. b6 Kxe5 12. b7 Kd4 13. b8=Q
24 1:21 +1 1. Bf6!!
24 1:21 +3 1. Bf6!!
24 1:23 9.76 1. Bf6 Kb7 2. Bd4 Kc8 3. Bb6 Kb7 4.
Kc5 b4 5. axb4 a3 6. Bd8 Kc8 7. Bf6
Kc7 8. Be5+ Kd8 9. Kc6 Ke7 10. b5 Ke6
11. Bd4 a2 12. b6 Kf5 13. Ba1 Ke6
24-> 1:34 9.76 1. Bf6 Kb7 2. Bd4 Kc8 3. Bb6 Kb7 4.
Kc5 b4 5. axb4 a3 6. Bd8 Kc8 7. Bf6
Kc7 8. Be5+ Kd8 9. Kc6 Ke7 10. b5 Ke6
11. Bd4 a2 12. b6 Kf5 13. Ba1 Ke6
25 1:39 10.00 1. Bf6 Kb7 2. Bd4 Kc8 3. Bb6 Kb7 4.
Kc5 b4 5. axb4 a3 6. Bd8 Kc8 7. Bf6
Kc7 8. Be5+ Kd8 9. Kc6 Ke7 10. b5 Ke6
11. Ba1 Kf5 12. b6 Ke4 13. b7 Kd3 14.
b8=Q
25-> 2:09 10.00 1. Bf6 Kb7 2. Bd4 Kc8 3. Bb6 Kb7 4.
Kc5 b4 5. axb4 a3 6. Bd8 Kc8 7. Bf6
Kc7 8. Be5+ Kd8 9. Kc6 Ke7 10. b5 Ke6
11. Ba1 Kf5 12. b6 Ke4 13. b7 Kd3 14.
b8=Q
26 2:30 10.21 1. Bf6 Kb7 2. Bd4 Kc8 3. Bb6 Kb7 4.
Kc5 b4 5. axb4 a3 6. Bd8 Kc8 7. Bf6
Kc7 8. Be5+ Kd8 9. b5 Kd7 10. b6 Ke6
11. b7 Kxe5 12. b8=Q+ Ke4 13. Qa8+
Kd3 14. Qxa3+ Kc2 15. Kd4 Kb1 16. Kc5
26-> 3:23 10.21 1. Bf6 Kb7 2. Bd4 Kc8 3. Bb6 Kb7 4.
Kc5 b4 5. axb4 a3 6. Bd8 Kc8 7. Bf6
Kc7 8. Be5+ Kd8 9. b5 Kd7 10. b6 Ke6
11. b7 Kxe5 12. b8=Q+ Ke4 13. Qa8+
Kd3 14. Qxa3+ Kc2 15. Kd4 Kb1 16. Kc5
27 4:39 +1 1. Bf6!!
27 4:50 +3 1. Bf6!!
time=10:00 cpu=97% mat=2 n=910463487 fh=93% nps=1.52M
ext-> chk=114451167 cap=482083 pp=1193100 1rep=3235260 mate=240992
predicted=0 nodes=910463487 evals=31009012 50move=0
endgame tablebase-> probes=2648282 hits=109
White(1): Bf6
time used: 10:00
So even in 10 min there is no mate score.
Kind regards
Bernhard
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