Author: Dann Corbit
Date: 13:52:55 12/15/03
Go up one level in this thread
On December 15, 2003 at 16:23:15, Dieter Buerssner wrote:
>[D] 5k2/1R4p1/5p2/4p2p/1p2P2P/r4P2/PK4P1/8 b - -
>
>This is from a game between Ruffian-Yace in the "CSS-Online-Masters" (time
>control 60 15).
>
>I think, after Ra4, white cannot make progress, and the game will end in draw.
>Yace played Re3? instead (with 0.0 score). Are there engines, that show in
>reasonable time a big score difference between Re3 and Ra4?. I believe Re3 loses
>by force. For example Re3 Rxb4 Re2 Kb3 Rxg2?! (possibly Re3 instead gives more
>resistance) a4.
>
>It is not a real good test position, because engines can show for a long time
>the same score for Ra4 and Re3, and the chosen move might be pure luck.
>Therefore also the question for scores after those moves.
Ruffian 1.01 takes 5 minutes on a 950 MHz AMD Athlon:
E:\programme\winboard\ruffian>ruffian -h 300M -T \dtest.epd -t 999 -p 9
Hash size 314572800
Ruffian 1.0.1
feature done=0
Loading configuration: ruffian.cfg
Warning: EGTB_HASH_SIZE changed, default=1048576, newvalue=8388608
Logfile: Mon Dec 15 13:42:00 2003
Total hash size 300M
Initializing tablebases: e:/programme/winboard/nalimov
Testing \dtest.epd, 999 seconds, extra ply 9
Testing: test 1 Solution: Ra4
5k2/1R4p1/5p2/4p2p/1p2P2P/r4P2/PK4P1/8 b - -
Depth Time Score Best line
10/20 1.13 -0.21 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rh2 Rb8+ Ke7 a5 Rxh4
a6
10--> 1.22 -0.21 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rh2 Rb8+ Ke7 a5 Rxh4
a6
11/22 2.20 -0.03 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 g5 hxg5 fxg5 Kc4 Rf2
Rb8+ Ke7 Rb7+ Ke6
11--> 2.35 -0.03 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 g5 hxg5 fxg5 Kc4 Rf2
Rb8+ Ke7 Rb7+ Ke6
12/23 3.22 -0.15 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 f5
a6 Rf2 exf5 Rxf5
12--> 3.62 -0.15 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 f5
a6 Rf2 exf5 Rxf5
13/24 5.39 -0.13 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 g5
a6 Rf2 Rb8+ Kf7 Rb7+ Ke6
13--> 6.23 -0.13 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 g5
a6 Rf2 Rb8+ Kf7 Rb7+ Ke6
14/28 13.24 0.00 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Kb2 Rf2+
Kb3 g5 a6 Rf3+
14--> 14.33 0.00 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Kb2 Rf2+
Kb3 g5 a6 Rf3+
15/29 23.74 -0.23 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 Rf2
a6 Ra2+ Kb5 Ke7 Ra4 Rb2+ Kc5 Ke6
15--> 30.70 -0.23 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 Rf2
a6 Ra2+ Kb5 Ke7 Ra4 Rb2+ Kc5 Ke6
16/31 47.09 -0.23 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 Rf2
a6 Ra2+ Kb5 g5 Ra4 Rb2+ Ka5 Rb8 Rb4
16--> 55.30 -0.23 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 Rf2
a6 Ra2+ Kb5 g5 Ra4 Rb2+ Ka5 Rb8 Rb4
17/33 1:43 0.00 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 Rf2
a6 Ra2+ Kb5 g5 Ra4 Rb2+ Rb4 Ra2
17--> 1:56 0.00 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 Rf2
a6 Ra2+ Kb5 g5 Ra4 Rb2+ Rb4 Ra2
18/33 3:36 -- ... Re3
18/34 4:20 -0.35 ... Re3 Rxb4 Re2+ Kb3 Rxg2 a4 Rg3 a5 Rxf3+ Ka4 Rf2
a6 Ra2+ Kb5 Ke7 Ra4 Rb2+ Kc6 Rc2+ Kd5 Rd2+ Kc5 Rc2+
Rc4 Rd2
18/34 4:58 x.xx ... Ra4
18/34 5:56 -0.13 ... Ra4 Rc7 Ra3 Rc4 Ra4 Rc8+ Kf7 Rc7+ Kf8 Kb1 Kg8
Rc8+ Kh7 Kb2 g6 Rc2 Ra3 Rc7+ Kh6 Rc4 Ra4 Kb3
18--> 7:21 -0.13 ... Ra4 Rc7 Ra3 Rc4 Ra4 Rc8+ Kf7 Rc7+ Kf8 Kb1 Kg8
Rc8+ Kh7 Kb2 g6 Rc2 Ra3 Rc7+ Kh6 Rc4 Ra4 Kb3
19/38 9:46 -0.13 ... Ra4 Rc7 Ra3 Rc4 Ra4 Rc8+ Kf7 Rc7+ Kf8 Kb1 Kg8
Rc8+ Kh7 Kb2 g6 g4 hxg4 fxg4 b3 Kxb3 Rxe4 Rc7+ Kh6
Rc4 Re3+
19... 9:46 2/17 Re3
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