Author: Dann Corbit
Date: 22:02:39 07/19/00
Go up one level in this thread
On July 19, 2000 at 09:33:55, Andrew Williams wrote:
>Here is a position that arose in a game on ICC today (PGN below):
>
>[D] 8/1N6/6p1/2K1k2p/8/1PP5/8/8 w - - acd 11; acn 576768; acs 5; ce 772; fmvn
>60; hmvc 0; id "PostModernist vs Tinker"; pm Kc6 ; pv 60. Kc6 h4 61. Nc5 Kf4 62.
>Kd5
Intersting that according to crafty, neither of the obvious moves (Nd6, Kc4)
have a good outcome. In order to achieve the draw, Nd8 is necessary and it is
very, very deep to find it [48 minutes on a PII 350 MHz to find it!]. I think
this might be a good test position for deep searching ability.
How do commercial engines do on this one?
choose from book moves randomly (using weights.)
choose from 5 best moves.
book learning enabled
result learning enabled
position learning enabled
threshold set to 9 pawns.
4 piece tablebase files found
1302kb of RAM used for TB indices and decompression tables
Crafty v17.11
White(1): st 9999
search time set to 9999.00.
White(1): epdpfga epd.epd epd.out
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 166:39 (166:39)
nss depth time score variation (1)
9 0.84 3.60 1. Nd6 h4 2. Nc4+ Ke4 3. b4 h3 4. Nd2+
Kf4 5. Nf1 g5 6. Nh2
9-> 1.05 3.60 1. Nd6 h4 2. Nc4+ Ke4 3. b4 h3 4. Nd2+
Kf4 5. Nf1 g5 6. Nh2
10 1.66 3.21 1. Nd6 h4 2. Nc4+ Kf4 3. Nd2 h3 4.
Nf1 g5 5. Kd5 g4 6. Nh2
10-> 2.23 3.21 1. Nd6 h4 2. Nc4+ Kf4 3. Nd2 h3 4.
Nf1 g5 5. Kd5 g4 6. Nh2
11 2.75 3.25 1. Nd6 h4 2. Nc4+ Kf4 3. Nd2 h3 4.
Nf1 g5 5. b4 g4 6. b5 Ke5
11 4.48 3.47 1. Kc6 g5 2. Nc5 g4 3. Nd7+ Kf4 4.
Nf6 h4 5. Nd5+ Ke4 6. b4 h3 7. b5
11-> 5.19 3.47 1. Kc6 g5 2. Nc5 g4 3. Nd7+ Kf4 4.
Nf6 h4 5. Nd5+ Ke4 6. b4 h3 7. b5
12 8.40 -- 1. Kc6
12 9.94 2.78 1. Kc6 h4 2. Nc5 Kf4 3. Kd5 h3 4. Ne4
h2 5. Nf2 g5 6. c4 g4 7. c5
12 10.16 ++ 1. Nd6!!
12-> 13.42 3.17 1. Nd6
13 15.22 -- 1. Nd6
13 17.63 0.65 1. Nd6 h4 2. Nc4+ Kf4 3. Nd2 h3 4.
Nf1 g5 5. b4 g4 6. b5 g3 7. Nxg3 Kxg3
13 18.10 ++ 1. Kc6!!
13 26.95 1.29 1. Kc6 g5 2. Kb5 g4 3. Nd8 g3 4. Nc6+
Ke4 5. Nd4 g2 6. Ne2 Kd3 7. Ng1 Kxc3
8. b4
13 29.39 ++ 1. Kc4!!
13 30.17 3.08 1. Kc4 h4 2. Nc5 h3 3. Nd3+ Kd6 4.
Nf2 h2 5. b4 Kc6 6. Nh1 g5 7. Kd4 g4
8. c4
13-> 31.00 3.08 1. Kc4 h4 2. Nc5 h3 3. Nd3+ Kd6 4.
Nf2 h2 5. b4 Kc6 6. Nh1 g5 7. Kd4 g4
8. c4
14 43.15 3.17 1. Kc4 g5 2. Nc5 g4 3. Kd3 h4 4. Ke3
h3 5. Ne4 Kf5 6. Ng3+ Ke5 7. Nf1 Kd5
8. Ng3
14-> 50.36 3.17 1. Kc4 g5 2. Nc5 g4 3. Kd3 h4 4. Ke3
h3 5. Ne4 Kf5 6. Ng3+ Ke5 7. Nf1 Kd5
8. Ng3
15 1:08 3.19 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 g5 4. Ke2
g4 5. Nd3+ Kf5 6. Kf2 Ke4 7. c4 h3
8. Kg3 Kf5
15-> 1:22 3.19 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 g5 4. Ke2
g4 5. Nd3+ Kf5 6. Kf2 Ke4 7. c4 h3
8. Kg3 Kf5
16 1:32 3.25 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 g5 4. Ke2
g4 5. Nd3+ Ke4 6. Nf2+ Kf5 7. b4 g3
8. Nh3 Ke6 9. b5 Kd5
16-> 1:56 3.25 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 g5 4. Ke2
g4 5. Nd3+ Ke4 6. Nf2+ Kf5 7. b4 g3
8. Nh3 Ke6 9. b5 Kd5
17 2:12 3.48 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 g5 4. Ke2
g4 5. Nd3+ Kf5 6. Kf2 Ke4 7. c4 g3+
8. Kg2 Kd4 9. c5 Kd5 10. b4
17-> 2:57 3.48 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 g5 4. Ke2
g4 5. Nd3+ Kf5 6. Kf2 Ke4 7. c4 g3+
8. Kg2 Kd4 9. c5 Kd5 10. b4
18 3:28 ++ 1. Kc4!!
18 5:57 4.12 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 g5 4. b4
Kf3 5. Ne4 g4 6. Nd2+ Kf4 7. b5 h3
8. b6 h2 9. b7 h1=Q 10. b8=Q+ Kf5 11.
Qf8+ Ke5 12. c4
18-> 7:40 4.12 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 g5 4. b4
Kf3 5. Ne4 g4 6. Nd2+ Kf4 7. b5 h3
8. b6 h2 9. b7 h1=Q 10. b8=Q+ Kf5 11.
Qf8+ Ke5 12. c4
19 9:03 -- 1. Kc4
19 11:04 3.53 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 h3 4. Ke2
h2 5. Nd3+ Kg3 6. Nf2 g5 7. c4 g4 8.
Ke3 Kh4 9. Nh1 Kg5 10. c5 Kf5 11. c6
19-> 15:58 3.53 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 h3 4. Ke2
h2 5. Nd3+ Kg3 6. Nf2 g5 7. c4 g4 8.
Ke3 Kh4 9. Nh1 Kg5 10. c5 Kf5 11. c6
20 16:54 -- 1. Kc4
20 24:36 -1.12 1. Kc4 h4 2. Nc5 Kf4 3. Kd3 h3 4. Ke2
h2 5. Nd3+ Kg3 6. Nf2 Kg2 7. b4 g5
8. b5 g4 9. b6 g3 10. Nh1 Kxh1 11.
b7 g2 12. b8=Q g1=Q
20 40:55 ++ 1. Nd8!!
20 79:15 0.00 1. Nd8 h4 2. Nc6+ Ke4 3. b4 h3 4. b5
h2 5. b6 h1=Q 6. b7 Qc1 7. b8=Q Qxc3+
8. Kd6 Qg3+ 9. Ke7 Qxb8 10. Nxb8 <HT>
20-> 81:01 0.00 1. Nd8 h4 2. Nc6+ Ke4 3. b4 h3 4. b5
h2 5. b6 h1=Q 6. b7 Qc1 7. b8=Q Qxc3+
8. Kd6 Qg3+ 9. Ke7 Qxb8 10. Nxb8 <HT>
21 84:50 0.00 1. Nd8 h4 2. Nc6+ Ke4 3. b4 h3 4. b5
h2 5. b6 h1=Q 6. b7 Qc1 7. b8=Q Qxc3+
8. Kd6 Qg3+ 9. Ke7 Qxb8 10. Nxb8 <HT>
21-> 109:53 0.00 1. Nd8 h4 2. Nc6+ Ke4 3. b4 h3 4. b5
h2 5. b6 h1=Q 6. b7 Qc1 7. b8=Q Qxc3+
8. Kd6 Qg3+ 9. Ke7 Qxb8 10. Nxb8 <HT>
22 119:32 0.00 1. Nd8 h4 2. Nc6+ Ke4 3. b4 h3 4. b5
h2 5. b6 h1=Q 6. b7 Qc1 7. b8=Q Qxc3+
8. Kd6 Qg3+ 9. Ke7 Qxb8 10. Nxb8 <HT>
22-> 144:37 0.00 1. Nd8 h4 2. Nc6+ Ke4 3. b4 h3 4. b5
h2 5. b6 h1=Q 6. b7 Qc1 7. b8=Q Qxc3+
8. Kd6 Qg3+ 9. Ke7 Qxb8 10. Nxb8 <HT>
time=166:39 cpu=99% mat=3 n=2470367590 fh=3% nps=247041
ext-> checks=218881087 recaps=5807422 pawns=9901037 1rep=3817901
thrt:56281
predicted=0 nodes=2470367590 evals=438265661
endgame tablebase-> probes done=85362 successful=85362
hashing-> trans/ref=1% pawn=0% used=99%
White(1): quit
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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