Author: Dann Corbit
Date: 14:17:36 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.
Crafty sees it going bad, but does not solve it in a reasonable time on a 950
MHz AMD Athlon:
search time set to 999.00.
White(1): epdpfga \dtest.epd dtest.out
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
depth time score variation (1)
9 0.36 0.53 1. ... Ra4 2. Rc7 g6 3. Rb7 Kg8 4.
g3 Kf8 5. Rd7 Ra3
9 0.99 0.34 1. ... Rd3 2. Kc2 Rc3+ 3. Kb1 Rc4 4.
Kb2 Rd4 5. Kb3 Rd2 6. Rxb4 Rxg2
9 1.41 0.21 1. ... Re3 2. Rb8+ Kf7 3. Rxb4 Re2+
4. Ka3 Rxg2 5. Rb7+ Ke6 6. Rb2 Rg3
7. Rb6+ Ke7 <HT>
9-> 1.58 0.21 1. ... Re3 2. Rb8+ Kf7 3. Rxb4 Re2+
4. Ka3 Rxg2 5. Rb7+ Ke6 6. Rb2 Rg3
7. Rb6+ Ke7 <HT>
10 2.31 0.00 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kf8
10-> 2.50 0.00 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kf8
11 5.05 -0.09 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kg8
4. Rc7 g5 5. hxg5 fxg5 6. Rc5 g4 7.
fxg4 hxg4 8. Rc8+ Kf7 9. Rc4
11-> 5.47 -0.09 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kg8
4. Rc7 g5 5. hxg5 fxg5 6. Rc5 g4 7.
fxg4 hxg4 8. Rc8+ Kf7 9. Rc4
12 8.48 0.00 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kg8
4. Rc7 g6 5. Rc6 Kg7 6. Rc7+ Kf8 7.
Rc8+ Ke7 8. Rc4 Re2+ 9. Rc2 Rxc2+ 10.
Kxc2 Kd6 11. g4 Kc5 12. gxh5 gxh5 13.
Kb3 <HT>
12-> 9.90 0.00 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kg8
4. Rc7 g6 5. Rc6 Kg7 6. Rc7+ Kf8 7.
Rc8+ Ke7 8. Rc4 Re2+ 9. Rc2 Rxc2+ 10.
Kxc2 Kd6 11. g4 Kc5 12. gxh5 gxh5 13.
Kb3 <HT>
13 16.12 0.00 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kg8
4. Rc7 g6 5. Rc6 Kg7 6. Rc7+ Kf8 7.
Rc8+ Ke7 8. Rc4 Re2+ 9. Rc2 Rxc2+ 10.
Kxc2 Kd6 11. g4 Kc5 12. gxh5 gxh5 13.
Kb3 <HT>
13-> 20.63 0.00 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kg8
4. Rc7 g6 5. Rc6 Kg7 6. Rc7+ Kf8 7.
Rc8+ Ke7 8. Rc4 Re2+ 9. Rc2 Rxc2+ 10.
Kxc2 Kd6 11. g4 Kc5 12. gxh5 gxh5 13.
Kb3 <HT>
14 38.06 0.00 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kg8
4. Rc7 g6 5. Rc6 Kg7 6. Rc7+ Kf8 7.
Rc8+ Ke7 8. Rc4 Re2+ 9. Rc2 Rxc2+ 10.
Kxc2 Kd6 11. g4 Kc5 12. gxh5 gxh5 13.
Kb3 <HT>
14-> 46.12 0.00 1. ... Re3 2. Rb8+ Kf7 3. Rb7+ Kg8
4. Rc7 g6 5. Rc6 Kg7 6. Rc7+ Kf8 7.
Rc8+ Ke7 8. Rc4 Re2+ 9. Rc2 Rxc2+ 10.
Kxc2 Kd6 11. g4 Kc5 12. gxh5 gxh5 13.
Kb3 <HT>
15 2:00 0.19 1. ... Re3 2. Rxb4 Re2+ 3. Ka1 Rxg2
4. a4 Rf2 5. Rb3 g5 6. a5 gxh4 7. a6
Rf1+ 8. Kb2 Rf2+ 9. Ka3 Rc2 10. a7
Rc8
15-> 2:56 0.19 1. ... Re3 2. Rxb4 Re2+ 3. Ka1 Rxg2
4. a4 Rf2 5. Rb3 g5 6. a5 gxh4 7. a6
Rf1+ 8. Kb2 Rf2+ 9. Ka3 Rc2 10. a7
Rc8
16 5:36 0.21 1. ... Re3 2. Rxb4 Re2+ 3. Ka1 Rxg2
4. a4 Rf2 5. Rb3 Rf1+ 6. Kb2 Rh1 7.
a5 Rxh4 8. a6 Rh2+ 9. Ka3 Rh1 10. Rb8+
Kf7 11. Rh8
16-> 9:09 0.21 1. ... Re3 2. Rxb4 Re2+ 3. Ka1 Rxg2
4. a4 Rf2 5. Rb3 Rf1+ 6. Kb2 Rh1 7.
a5 Rxh4 8. a6 Rh2+ 9. Ka3 Rh1 10. Rb8+
Kf7 11. Rh8
17 15:39 0.35 1. ... Re3 2. Rxb4 Re2+ 3. Ka1 Rxg2
4. a4 Rg3 5. Rb3 f5 6. exf5 Rh3 7.
a5 Rxh4 8. Rb5 Ke7 9. Rxe5+ Kf6 10.
Rd5 Rh2
time=16:39 cpu=92% mat=0 n=489279813 fh=90% nps=489k
ext-> chk=22828934 cap=1526079 pp=1372404 1rep=313987 mate=44067
predicted=0 nodes=489279813 evals=199284608
endgame tablebase-> probes=696 hits=696
Black(1):
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