Author: Stuart Cracraft
Date: 11:50:18 01/30/98
I am curious what people think of the following position:
black
. . . . . . . .
. . . . . . . p
. p . . K P b .
p . . . . . k .
P . P . . . . .
. P . . . . . .
. . . . . . . .
. . . . . . . .
The position is:
8/7p/1p2KPb1/p5k1/P1P5/1P6/8/8 b - - 0 1
The right move looks to this human to be h5. Only a very
long search saw this for my program and I am wondering what
heuristic I am missing:
Phase = Endgame, 60 moves in 300 secs, target = 32767 sec, Root score =
828
1- 0.0 8 23 Bb1
1. 0.1 392 24 Bb1
2+ 0.1 828 34 Bb1
2. 0.1 108 96 Bb1 Ke5
3+ 0.1 492 162 Bc2
3. 0.1 108 596 Bc2 Ke5 Kg4
4+ 0.1 592 1212 b5
4. 0.2 208 2692 b5 Ke5 Kg4 cxb5
5+ 0.2 428 7680 Bf7+
5. 0.3 108 12337 Bf7+ Kxf7 Kg4 b4 axb4 Kf8
6+ 0.4 328 17455 b5
6. 0.8 308 40822 b5 f7 bxa4 f8=Q Bf7+ Kxf7 axb3
7- 2.2 208 124063 b5
7& 2.3 192 132253 b5 f7 Bxf7+ Kxf7 b4 Kf8 Kf4 Ke7 h5
7. 2.4 192 136224 b5 f7 Bxf7+ Kxf7 b4 Kf8 Kf4 Ke7 h5
8+ 3.8 528 222438 b5
8. 6.2 508 381529 b5 f7 Bxf7+ Kxf7 bxa4 bxa4 Kf4 Kf8 h5
Kg8
Ke3
9- 18.8 408 1163781 b5
9& 24.9 28 1524091 b5 cxb5 Kh6 Ke7 Kh5 b4 axb4 f7 Bxf7
9& 28.4 108 1735916 h5 c5 h4 cxb6 Bf7+ Kxf7 Kg4 b7 Kf3 b8=R
9. 33.9 108 2051702 h5 c5 h4 cxb6 Bf7+ Kxf7 Kg4 b7 Kf3 b8=R
10+ 37.7 228 2281466 h5
10& 47.2 528 2831861 h5 Ke7 h4 f7 Bxf7 b4 Bxc4 bxa5 bxa5 Kd7
Kg4
Ke7
10. 81.9 528 5035141 h5 Ke7 h4 f7 Bxf7 b4 Bxc4 bxa5 bxa5 Kd7
Kg4
Ke7
My move is : h5
Time = 81.9 Rate=61491 Nodes=[4810845/224296/5035141]
Eval=2 RptCnt=855 NullCut=808
Extensions: Check=130655 Recapture=35156 Pawn=8 PassedPawn=0
OneMove=0 Threat=0 DeepSearch=0 Mate=0
Material=[400/600] Worst=[192/628]
Hash: Success=33% Collision=76%
Hash Counts: ReadHits=430723, ReadProbes=1282825, WriteColl=677831,
WriteTries=880527
Pawn Hash: Success=40% Collision=0%
Pawn Counts: ReadHits=2, ReadProbes=4, WriteColl=0, WriteTries=2
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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