Author: Steve Maughan
Date: 06:12:59 02/11/06
Go up one level in this thread
Here's another position where Glaurung 1.0.2 announces a mate that is shorter
than the optimal. This is a Mate in 21 yet Glaurung announces Mate in 19.
The problem is almost certainly a hashing problem. How do you store mate values
in the hash table? Do you store "distance from root to mate" or "distance from
current position to mate"?
[D]2k5/8/1pP1K3/1P6/8/8/8/8 w - -
Engine: Glaurung 1.0.2 (512 MB)
by Tord Romstad
2/04 0:00 +3.32 1.Kd6 Kb8 (16)
3/04 0:00 +3.04 1.Kd6 Kd8 2.Kd5 (53)
4/05 0:00 +2.10 1.Kd6 Kd8 2.Kd5 Kc7 (137)
4/05 0:00 +2.96 1.Ke5 Kc7 2.Ke6 Kc8 (296)
4/05 0:00 +2.98 1.Kd5 Kc7 2.Ke5 Kc8 (328)
5/06 0:00 +3.09 1.Kd5 Kc7 2.Ke5 Kc8 3.Kd6 (379)
6/08 0:00 +3.29 1.Kd5 Kc7 2.Ke5 Kb8 3.Kd6 Kc8 (614)
7/08 0:00 +2.90 1.Kd5 Kc7 2.Ke5 Kb8 3.Kd6 Kc8 4.Ke6 (999)
7/08 0:00 +2.93 1.Kf6 Kb8 2.Ke6 Kc8 3.Kd6 Kd8 4.Ke6 (1.541)
8/09 0:00 +2.98 1.Kf6 Kb8 2.Ke6 Kc8 3.Kd5 Kc7 4.Ke5 Kc8 (1.903)
9/10 0:00 +3.09 1.Kf6 Kb8 2.Kf7 Kc8 3.Ke8 Kc7 4.Ke7 Kc8
5.Kd6 (2.814)
10/12 0:00 +3.32 1.Kf6 Kb8 2.Kf7 Kc8 3.Ke8 Kc7 4.Ke7 Kc8
5.Kd6 Kd8 (3.545) 236
11/13 0:00 +3.04 1.Kf6 Kb8 2.Kf7 Kc8 3.Ke8 Kc7 4.Ke7 Kc8
5.Kd6 Kd8 6.Kd5 (5.392) 359
12/28 0:00 +2.98 1.Kf6 Kb8 2.Kf7 Kc8 3.Ke8 Kc7 4.Ke7 Kc8
5.Ke6 Kc7 6.Ke5 Kc8 (19.576) 631
13/28 0:00 +3.09 1.Kf6 Kb8 2.Kf7 Kc8 3.Ke8 Kc7 4.Ke7 Kc8
5.Ke6 Kc7 6.Ke5 Kc8 7.Kd6 (20.721) 668
13/28 0:00 +20.89 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Kc6 (21.346) 688
14/28 0:00 +20.89 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Kc6 Kc8 (22.249) 717
15/28 0:00 +20.89 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kb8 (24.353) 785
16/28 0:00 +20.89 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 (26.302) 848
17/28 0:00 +20.89 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 Kd8 (28.653) 622
18/28 0:00 +30.08 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Ke6 10.b8Q Kf5 (34.808) 756
19/28 0:00 +30.16 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Ke6 10.b8Q Kf5 11.Kb7 (41.986) 912
20/28 0:00 +30.16 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Ke6 10.b8Q Kf5 11.Kb7 Kg5 (46.189) 744
21/28 0:00 +30.24 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Ke6 10.b8Q Kf5 11.Kb7 Kg5
12.Kc8 (59.842) 767
22/30 0:00 +30.24 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Ke6 10.b8Q Kf5 11.Kb7 Kg5
12.Kc8 Kf5 (69.167) 886
23/32 0:00 +30.28 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Kc7 10.Ka7 Kd6 11.b8Q+ Kd5
12.Kb6 Kc4 13.Qc8+ Kd4 14.Kc6 (120.362) 962
24/34 0:00 +30.28 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Kc7 10.Ka7 Kd6 11.b8Q+ Kd5
12.Kb6 Kc4 13.Qc8+ Kd4 14.Qd8+ (147.002) 942
25/35 0:00 +30.32 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Kc7 10.Ka7 Kd6 11.b8Q+ Kd5
12.Kb6 Ke4 13.Kc5 Kf3 14.Kd4 (227.423) 971
26/38 0:00 +30.35 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Kc7 10.Ka7 Kd6 11.b8Q+ Kd5
12.Kb6 Ke4 13.Kc5 Kd3 14.Qf4 (383.412) 910
27/39 0:00 +30.39 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Kc7 10.Ka7 Kd6 11.b8Q+ Kd5
12.Kb6 Ke4 13.Kc5 Kd3 14.Qf4 (527.374) 865
28/42 0:01 +30.43 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Kc7 10.Ka7 Kd6 11.b8Q+ Kd5
12.Qg8+ Kd4 13.Qg4+ Kd3 14.Kb6 (791.902) 780
29/44 0:02 +30.47 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Kc7 10.Ka7 Kd6 11.b8Q+ Kd5
12.Qf4 Ke6 13.Ka6 Kd5 14.Kb6 (1.595.412) 724
30/44 0:03 +30.51 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Kc7 10.Ka7 Kd6 11.b8Q+ Kd5
12.Qf4 Ke6 13.Qg5 Kd6 14.Kb6 (2.185.958) 666
31/47 0:04 +30.55 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc8 8.b6 Kd7
9.b7 Kc7 10.Ka7 Kd6 11.b8Q+ Kd5
12.Qf4 Ke6 13.Qg5 Kd6 14.Kb6 (2.864.163) 623
32/47 0:08 +30.59 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 Kd7 10.b7 Ke6 11.b8Q Kf5
12.Qg3 Ke4 13.Kb6 Kd4 14.Qf4+ (4.565.068) 561
33/50 0:09 +30.59 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 Kd7 10.b7 Ke6 11.b8Q Kf5
12.Qg3 Ke4 13.Kb6 Kd4 14.Qf2+ (5.396.550) 549
34/50 0:12 +30.59 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 Kd7 10.b7 Ke6 11.b8Q Kf5
12.Qg3 Ke4 13.Kb6 Kf5 14.Kc5 (6.757.702) 537
35/50 0:14 +M19 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 Kd7 10.b7 Ke6 11.b8Q Kf5
12.Qb4 Kf6 13.Qf4+ Kg7 14.Qg5+ (7.493.957) 516
36/50 0:16 +M19 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 Kd7 10.b7 Ke6 11.b8Q Kf5
12.Qb4 Kf6 13.Qf4+ Kg7 14.Qg5+ (8.043.366) 501
37/50 0:17 +M19 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 Kd7 10.b7 Ke6 11.b8Q Kf5
12.Qb4 Kf6 13.Qf4+ Kg7 14.Qg5+ (8.685.851) 490
38/50 0:19 +M19 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 Kd7 10.b7 Ke6 11.b8Q Kf5
12.Qb4 Kf6 13.Qf4+ Kg7 14.Qg5+ (9.358.654) 480
39/50 0:21 +M19 1.c7 Kxc7 2.Ke7 Kc8 3.Kd6 Kb7 4.Kd7 Kb8
5.Kc6 Kc8 6.Kxb6 Kb8 7.Ka6 Kc7 8.b6+ Kc8
9.Ka7 Kd7 10.b7 Ke6 11.b8Q Kf5
12.Qb4 Kf6 13.Qf4+ Kg7 14.Qg5+ (10.026.938) 472
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