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Subject: is anyone prepared to go further than 31 ply ?

Author: Duncan Roberts

Date: 05:15:16 01/04/05

http://chessprogramming.org/cccsearch/ccc.php?art_id=173197


A couple of days ago I said (in a discussion about mtd(f)) that my chess
program can search the starting position to 30 ply over night when the eval
evaluates material only:


SOS no eval
1.00 0:00 0.00 1.h3 (2)
2.00 0:00 0.00 1.h3 (45)
3.00 0:00 0.00 1.h3 h6 2.h4 (138)
4.00 0:00 0.00 1.h3 h6 2.h4 (263)
5.00 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 (435)
6.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 (1.860)
7.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 (1.942)
8.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 (2.024)
9.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 (5.086)
10.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 (16.891)
11.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (41.424)
12.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (94.654)
463.9
13.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (132.293)
497.3
14.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (245.124)
505.4
15.01 0:00 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (359.203)
533.7
16.01 0:01 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (714.937)
593.8
17.01 0:02 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (1.212.436)
570.2
18.01 0:02 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (1.729.490)
585.4
19.01 0:05 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (3.025.316)
605.0
20.01 0:08 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (4.700.415)
587.5
21.01 0:15 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (9.323.868)
621.5
22.01 0:29 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (16.881.247)
582.1
23.01 0:48 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (28.659.953)
597.0
24.01 1:36 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8 (56.472.536)
588.2
25.01 3:37 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8
(127.308.632) 586.6
26.01 7:41 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8
(275.114.597) 596.7
27.01 17:31 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8
(622.179.104) 591.9
28.01 45:16 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8
(1.602.666.536) 590.0
29.01 80:46 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8
(-1452508008) 586.5
30.01 161:28 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8
(1.397.948.590) 587.6
31.01 513:07 0.00 1.h3 h6 2.h4 h5 3.g3 g6 4.Rh3 Rh6 5.Rh1 Rh8
(471.878.568) 573.3


Actually 30 ply was reached after 2:41 hours.

SW: no search extensions, normal nullmove pruning, normal quiescence
search
HW: 2xCeleron 466 MHz, 500 MByte Hash


Can anyone do better?


Rudolf

Re: is anyone prepared to go further than 31 ply ? Dann Corbit 16:26:27 01/05/05
- Re: is anyone prepared to go further than 31 ply ? Tony Werten 01:24:16 01/06/05
- Re: is anyone prepared to go further than 31 ply ? Uri Blass 19:33:44 01/05/05
  - Re: is anyone prepared to go further than 31 ply ? Tony Werten 22:50:09 01/05/05
Re: is anyone prepared to go further than 31 ply ? Henk Bossinade 07:24:49 01/05/05

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