Author: Christophe Theron
Date: 17:31:58 10/09/02
Go up one level in this thread
On October 09, 2002 at 10:26:25, Chessfun wrote:
>On October 09, 2002 at 10:18:07, Christophe Theron wrote:
>
>>On October 08, 2002 at 13:22:38, Dann Corbit wrote:
>>
>>>There have been a few programs that could solve it. But it usually meant
>>>tweaking parameters until the general play was crappy. Using default settings,
>>>Ruffian runs roughshod over WAC.230. I think I will give Ruffian a go at the
>>>possible refutation line. At any rate, the solution move is the only one with
>>>any real winning chances. Therefore, I salute Ruffian for this monumental
>>>achievement.
>>>
>>>E:\programme\winboard\ruffian>ruffian -T 5.epd -t 999 -h 300M
>>>Hash size 314572800
>>>Ruffian 1.0.1
>>>feature done=0
>>>Loading configuration: ruffian.cfg
>>>Warning: EGTB_HASH_SIZE changed, default=1048576, newvalue=8388608
>>>Logfile: Tue Oct 08 10:02:58 2002
>>>Total hash size 300M
>>>Initializing tablebases: /programme/winboard/nalimov
>>>Testing 5.epd, 999 seconds, extra ply 3
>>>Testing: WAC.230 Solution: Rb4
>>> 2b5/1r6/2kBp1p1/p2pP1P1/2pP4/1pP3K1/1R3P2/8 b - -
>>> Depth Time Score Best line
>>> 12--> 1.40 1.98 ... a4 Ba3 Rh7 f3 Rh5 Kf4 Rh1 Bd6 Rc1 Bb4 Bb7 Ke3
>>> Re1+
>>> 13/23 1.93 2.00 ... a4 Ba3 Rh7 Rb1 Rh8 f4 Ba6 Kg4 Kd7 Rb2 Bb5 Kg3
>>> Bc6
>>> 13--> 2.34 2.00 ... a4 Ba3 Rh7 Rb1 Rh8 f4 Ba6 Kg4 Kd7 Rb2 Bb5 Kg3
>>> Bc6
>>> 14/23 2.63 1.96 ... a4 Ba3 Rh7 Rb1 Rh8 f4 Ba6 Kg4 Rh5 Rb2 Rh7 Bd6
>>> Bb5 Ba3
>>> 14--> 3.23 1.96 ... a4 Ba3 Rh7 Rb1 Rh8 f4 Ba6 Kg4 Rh5 Rb2 Rh7 Bd6
>>> Bb5 Ba3
>>> 15/25 4.32 2.00 ... a4 Ba3 Rh7 Rb1 Rh8 f4 Ba6 Bb2 Bb5 Ba3 Rh7 Rb2
>>> Rh1 Kf2 Kd7 Ke3
>>> 15--> 4.62 2.00 ... a4 Ba3 Rh7 Rb1 Rh8 f4 Ba6 Bb2 Bb5 Ba3 Rh7 Rb2
>>> Rh1 Kf2 Kd7 Ke3
>>> 16/29 6.29 1.99 ... a4 Ba3 Rh7 Rb1 Rh8 f4 Ba6 Bb2 Rh5 Kg2 Rh7 Ra1
>>> Bb5 Kg3
>>> 16--> 9.05 1.99 ... a4 Ba3 Rh7 Rb1 Rh8 f4 Ba6 Bb2 Rh5 Kg2 Rh7 Ra1
>>> Bb5 Kg3
>>> 17/29 12.68 2.00 ... a4 Ba3 Rh7 Rb1 Rh8 f3 Ba6 Bb2 Rh5 f4 Kd7 Ba3
>>> Bb5 Rb2 Rh1 Kg4 Bc6
>>> 17/32 28.40 x.xx ... Rb4
>>> 17--> 31.67 2.00 ... a4 Ba3 Rh7 Rb1 Rh8 f3 Ba6 Bb2 Rh5 f4 Kd7 Ba3
>>> Bb5 Rb2 Rh1 Kg4 Bc6
>>> 18/33 36.36 2.01 ... a4 Ba3 Rh7 Rb1 Rh8 f3 Ba6 Bb2 Rh5 f4 Rh7 Ra1
>>> Bb5 Rb1 Kd7 Ra1 Rh8
>>> 18--> 38.47 2.01 ... a4 Ba3 Rh7 Rb1 Rh8 f3 Ba6 Bb2 Rh5 f4 Rh7 Ra1
>>> Bb5 Rb1 Kd7 Ra1 Rh8
>>> 19/34 56.08 2.02 ... a4 Ba3 Rh7 Rb1 Rh8 Bb2 Ba6 Kg4 Kd7 Ba3 Rh5 Bb2
>>> Bb5 Ba3 Rh2 Kg3 Rh8 Rb2 Bc6 f3 Bb5 Kf4 Rh1 Ke3
>>> 19--> 1:01 2.02 ... a4 Ba3 Rh7 Rb1 Rh8 Bb2 Ba6 Kg4 Kd7 Ba3 Rh5 Bb2
>>> Bb5 Ba3 Rh2 Kg3 Rh8 Rb2 Bc6 f3 Bb5 Kf4 Rh1 Ke3
>>> 20/39 1:22 2.02 ... a4 Ba3 Rh7 Rb1 Rh8 Bb2 Ba6 Kg4 Kd7 Ba3 Bb5 f3
>>> Rh2 Rb2 Rh1 Bb4 Rc1 Kf4 Bc6 Ke3 Rg1
>>> 20/40 2:29 x.xx ... Rb4
>>> 20/40 3:39 ++ ... Rb4
>>> 20/40 4:50 2.42 ... Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2 Kc4 f3 Kxd4 Kf4
>>> Kd3 Rh2 Bd7 Bc1 Bb5 Ba3 c2 Rxc2 Kxc2 Ke3
>>> 20--> 4:50 2.42 ... Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Re2 Kc4 f3 Kxd4 Kf4
>>> Kd3 Rh2 Bd7 Bc1 Bb5 Ba3 c2 Rxc2 Kxc2 Ke3
>>> 21/41 7:34 2.61 ... Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Rb1 Kc4 f4 Kxd4 Kf3
>>> Kc4 Ke2 d4 Rb2 cxb2 Bxb2 Kd5 Kf3 Ba6 Kg3 d3
>>> 21--> 7:43 2.61 ... Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Rb1 Kc4 f4 Kxd4 Kf3
>>> Kc4 Ke2 d4 Rb2 cxb2 Bxb2 Kd5 Kf3 Ba6 Kg3 d3
>>> 22/45 12:39 2.71 ... Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Rb1 Kc4 f4 Kxd4 Kf3
>>> Kc4 Ke2 d4 Rc1 Ba6 Kd1 Kd3 Rc2 bxc2+ Kc1 Bc4 Bd6
>>> 22--> 12:53 2.71 ... Rb4 cxb4 a4 b5+ Kxb5 Ba3 c3 Rb1 Kc4 f4 Kxd4 Kf3
>>> Kc4 Ke2 d4 Rc1 Ba6 Kd1 Kd3 Rc2 bxc2+ Kc1 Bc4 Bd6
>>>
>>>
>>>Time: 12:53, cpu 97.95%, nodes 490644808, nps 634457
>>>Hash: 128M, used 99%, hits 43%
>>>EGTB: probs 0, hits 0
>>>
>>>Best move: Rb4 (2.71) Solved (1/1)
>>
>>
>>
>>OK, so finding Rb4 in 2min 29sec is a monumental achievement?
>>
>>Chess Tiger 15, P4 1.6GHz, 96Mb hash:
>>
>>00:00:00.7 2,43 10 Rd7 Bc5 Rf7 f4 Rh7 Rb1 Kb5
>>00:00:01.4 2,43 11 Rd7 Bc5 Rf7 f4 Rh7 Rb1 Kb5 Ba3 Rf7 Kf3
>>00:00:04.3 2,44 12 Rd7 Bc5 Rf7 f4 Kb5 Rb1 Bb7 Ba3
>>00:00:06.1 2,46 12 Rh7 Rb1 Rh5 f4 Kb5 Ra1
>>00:00:09.4 2,49 12 Rb4 cxb4 a4 Rb1 c3 Rc1 c2 b5+ Kxb5
>>00:00:24.5 3,12 13 Rb4 Rb1 Ra4 f4 Kb5 Kf3 Ra2 Rc1
>>00:01:07.9 3,26 14 Rb4 Rb1 Ra4 f4 Ra2 Kf3 Kb5 Rc1
>>00:02:31.7 3,26 14 Rb4 Rb1 Ra4 f4 Ra2 Kf3 Kb5 Rc1
>>
>>
>>Rb4 found in 9.4 seconds.
>
>
>http://www.talkchess.com/forums/1/message.html?257694 ;-)
>
>Sarah.
I made a mistake. I was not using 96Mb hash, but only 48Kb.
Actually it finds Rb4 in 4 seconds on my computer.
Christophe
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