Author: Slater Wold
Date: 19:31:37 03/07/02
Go up one level in this thread
On March 07, 2002 at 22:00:56, Michael Fuhrmann wrote:
>Crafty, playing without tablebases, likes the suicidal move Bxe3 in this
>position. A flaw in its endgame knowledge?
>
>[D] 8/8/2k3P1/8/3b4/4R3/8/n4K2 b - - 0 56
With TB:
Black(1): setboard 8/8/2k3P1/8/3b4/4R3/8/n4K2 b - - 0 56
Black(1): st 180
search time set to 180.00.
Black(1): go
end-game phase
clearing hash tables
time surplus 0.00 time limit 3:00 (3:00)
nss depth time score variation (1)
2 0.00 Mat23 1. ... Bxe3 <HT>
2 0.00 -0.48 1. ... Nc2 2. Re8
(4) 7-> 0.16 0.00 1. ... Kc5 2. Rd3 Be5 3. Re3 Bd4
(3) 8 0.17 0.00 1. ... Kc5 2. Rd3 Be5 3. Re3 Bd4
(3) 8-> 0.27 0.00 1. ... Kc5 2. Rd3 Be5 3. Re3 Bd4
(2) 9 0.30 0.00 1. ... Kc5 2. Rd3 Bb2 3. Ra3 Nc2 4.
Ra2 Ne3+ 5. Ke2 Nc4 6. Rxb2 Nxb2
9-> 0.55 0.00 1. ... Kc5 2. Rd3 Bb2 3. Ra3 Nc2 4.
Ra2 Ne3+ 5. Ke2 Nc4 6. Rxb2 Nxb2
10 0.69 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Nc2 4.
Rd7 Kc6 5. Rd2 Ne3+ 6. Kf3 Nc4
(4) 10-> 1.86 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Nc2 4.
Rd7 Kc6 5. Rd2 Ne3+ 6. Kf3 Nc4
(3) 11 2.27 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Bg7 5. Ra7 Bd4 6. Rxa1 <HT>
(2) 11-> 6.35 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Bg7 5. Ra7 Bd4 6. Rxa1 <HT>
12 7.53 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(3) 12-> 11.99 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(2) 13 13.77 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(4) 13-> 22.25 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(3) 14 24.55 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(4) 14-> 39.83 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(3) 15 44.71 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(4) 15-> 1:09 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(3) 16 1:22 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(4) 16-> 2:26 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
(3) 17 2:51 0.01 1. ... Kc5 2. Rd3 Bb2 3. Kg2 Kc6 4.
Ra3 Kd5 5. Kh3 Ke4 6. Rxa1 <HT>
time=3:00 cpu=199% mat=0 n=145610958 fh=84% nps=807k
ext-> chk=5538062 cap=2261 pp=1507992 1rep=11367 mate=4660
predicted=0 nodes=145610958 evals=36489125
endgame tablebase-> probes done=592279 successful=507973
hashing-> trans/ref=50% pawn=99% used=99%
SMP-> split=1802 stop=422 data=9/32 cpu=5:59 elap=3:00
Without TB:
White(1): setboard 8/8/2k3P1/8/3b4/4R3/8/n4K2 b - - 0 56
Black(1): st 180
search time set to 180.00.
Black(1): go
end-game phase
clearing hash tables
time surplus 0.00 time limit 3:00 (3:00)
nss depth time score variation (1)
starting thread 1
(2) 7-> 0.10 2.35 1. ... Nc2 2. Re7 Kd5 3. g7 Bxg7 4.
Rxg7 Kd6 5. Kf2
8 0.13 -- 1. ... Nc2
8 0.18 3.61 1. ... Nc2 2. Re4 Bg7 3. Rc4+ Kd5 4.
Rxc2 Ke4 5. Rc7 Bd4
8 0.19 2.35 1. ... Kc7 2. Re4 Bb2 3. g7 Bxg7 4.
Re7+ Kd6 5. Rxg7 Nc2 6. Kf2 Nb4 <HT>
(2) 8-> 0.22 2.35 1. ... Kc7 2. Re4 Bb2 3. g7 Bxg7 4.
Re7+ Kd6 5. Rxg7 Nc2 6. Kf2 Nb4 <HT>
9 0.24 2.35 1. ... Kc7 2. Re4 Bb2 3. g7 Bxg7 4.
Re7+ Kd6 5. Rxg7 Nc2 6. Kf2 Nb4 <HT>
9-> 0.29 2.35 1. ... Kc7 2. Re4 Bb2 3. g7 Bxg7 4.
Re7+ Kd6 5. Rxg7 Nc2 6. Kf2 Nb4 <HT>
10 0.47 2.50 1. ... Kc7 2. Ke2 Kc6 3. Kd3 Kd5 4.
Re7 Nb3 5. Rd7+ Ke6 6. g7 Bxg7 7. Rxg7
10 0.83 2.45 1. ... Kc5 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Kd6 5. Kf2 Nd4 6. Rg6+ Kd7 7.
Ke3
10 1.07 2.35 1. ... Bh8 2. Re7 Nb3 3. Rh7 Ba1 4.
g7 Bxg7 5. Rxg7 Nd4 6. Kf2 Kd6
(4) 10-> 1.07 2.35 1. ... Bh8 2. Re7 Nb3 3. Rh7 Ba1 4.
g7 Bxg7 5. Rxg7 Nd4 6. Kf2 Kd6
(3) 11 1.16 2.45 1. ... Bh8 2. Re7 Nb3 3. Rh7 Ba1 4.
g7 Bxg7 5. Rxg7 Nd4 6. Kf2 Kd6 7. Rg4
<HT>
11-> 1.43 2.45 1. ... Bh8 2. Re7 Nb3 3. Rh7 Ba1 4.
g7 Bxg7 5. Rxg7 Nd4 6. Kf2 Kd6 7. Rg4
<HT>
12 1.68 2.45 1. ... Bh8 2. Re7 Nb3 3. Rh7 Ba1 4.
g7 Bxg7 5. Rxg7 Nd4 6. Kf2 Kd6 7. Rg6+
Kd7 8. Ke3 <HT>
12-> 2.15 2.45 1. ... Bh8 2. Re7 Nb3 3. Rh7 Ba1 4.
g7 Bxg7 5. Rxg7 Nd4 6. Kf2 Kd6 7. Rg6+
Kd7 8. Ke3 <HT>
13 2.71 2.50 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Kf3 Kd6
13-> 3.57 2.50 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Kf3 Kd6
14 4.21 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ke5 9. Kd3
(2) 14-> 5.74 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ke5 9. Kd3
15 6.80 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ng7 9. Kd3 Nf5
15-> 8.65 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ng7 9. Kd3 Nf5
16 12.29 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ng7 9. Kd3 Nf5 10. Rh8
16-> 15.36 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ng7 9. Kd3 Nf5 10. Rh8
17 36.44 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ng7 9. Kd3 Nf5 10. Rg6
Ke5
17-> 41.46 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ng7 9. Kd3 Nf5 10. Rg6
Ke5
18 1:43 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ng7 9. Kd3 Nf5 10. Rg6
Ke5 11. Kc4
18-> 1:52 2.55 1. ... Bh8 2. Re7 Nb3 3. g7 Bxg7 4.
Rxg7 Nd4 5. Kf2 Kd6 6. Rg6+ Kd5 7.
Ke3 Ne6 8. Rh6 Ng7 9. Kd3 Nf5 10. Rg6
Ke5 11. Kc4
time=3:00 cpu=211% mat=0 n=354046041 fh=87% nps=1964k
ext-> chk=14649463 cap=3291 pp=2125936 1rep=49587 mate=10279
predicted=0 nodes=354046041 evals=26101161
endgame tablebase-> probes done=0 successful=0
hashing-> trans/ref=62% pawn=99% used=99%
SMP-> split=2875 stop=460 data=10/32 cpu=6:20 elap=3:00
No Bxe3. But I think Bh8 loses.
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