Author: Andrew Wagner
Date: 16:56:25 04/18/04
Ok, I've been banging my head against this one all day. This is Fine #70:
[d]8/k7/3p4/p2P1p2/P2P1P2/8/8/K7 w - -
Below is Trueno's output for the position. Of course, the correct result is
+1.8 (Trueno counts pawns as .9) with the best move of Kb1. It finds that but
then changes its mind. I've been told that this position is generally infamous
for catching hash bugs. Anyone have any suggestions how to attack this one? Null
move is off, and I'm evaluating material only, using a single replace-always
hash table. Any suggestions would be VERY much appreciated). Andrew
-------------------------------
8 | . | . | . | . | . | . | . | . |
|-------------------------------|
7 | k | . | . | . | . | . | . | . |
|-------------------------------|
6 | . | . | . | p | . | . | . | . |
|-------------------------------|
5 | p | . | . | P | . | p | . | . |
|-------------------------------|
4 | P | . | . | P | . | P | . | . |
|-------------------------------|
3 | . | . | . | . | . | . | . | . |
|-------------------------------|
2 | . | . | . | . | . | . | . | . |
|-------------------------------|
1 | K | . | . | . | . | . | . | . |
-------------------------------
A B C D E F G H
Fifty: 0 En Passant: 0
Castle: 0000
Ply: 0 To move: True
1. Score: .9; Time: 0; nodes: 4; PV: a1-b2
2. Score: .9; Time: 0; nodes: 15; PV: a1-b2 a7-b6
3. Score: .9; Time: 0; nodes: 48; PV: a1-b2 a7-b6 b2-c3
4. Score: .9; Time: 0; nodes: 111; PV: a1-b2 a7-b6 b2-c3 b6-c7
5. Score: .9; Time: 0; nodes: 231; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4
6. Score: .9; Time: 0; nodes: 408; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
7. Score: .9; Time: 0; nodes: 671; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7 c4-d3
8. Score: .9; Time: 0; nodes: 1003; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7
9. Score: .9; Time: 0; nodes: 1443; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4
10. Score: .9; Time: 0; nodes: 1968; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4 e7-d7
11. Score: .9; Time: 0; nodes: 2735; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4 e7-d7 c4-d3
12. Score: .9; Time: 0; nodes: 3522; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7
13. Score: .9; Time: 0; nodes: 4416; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4
14. Score: .9; Time: 1; nodes: 5410; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4 e7-d7
15. Score: .9; Time: 1; nodes: 6584; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4 e7-d7 c4-d3
16. Score: .9; Time: 1; nodes: 7885; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7
17. Score: .9; Time: 1; nodes: 9273; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4
18. Score: .9; Time: 1; nodes: 10845; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-c4 c7-d7
c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4 e7-d7
19. Score: .9; Time: 1; nodes: 16249; PV: a1-b2 a7-b6 b2-c3 b6-b7 c3-c4 b7-b6
c4-d3 b6-c7 d3-c4 c7-d7 c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4 e7-d7 c4-d3
20. Score: .9; Time: 1; nodes: 18816; PV: a1-b2 a7-b6 b2-c3 b6-b7 c3-c4 b7-b6
c4-d3 b6-c7 d3-c4 c7-d7 c4-d3 d7-e7 d3-c4 e7-d7 c4-d3 d7-e7 d3-c4 e7-d7 c4-d3
d7-e7
21. Score: 1.8; Time: 2; nodes: 30305; PV: a1-b1 a7-b6 b1-c2 b6-b7 c2-d2 b7-c7
d2-d3 c7-b6 d3-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-h5 f6-f7 h5-g5
f7-e8 g5-f5
22. Score: 1.8; Time: 2; nodes: 40127; PV: a1-b1 a7-b6 b1-c2 b6-b7 c2-d2 b7-c7
d2-d3 c7-b6 d3-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-h5 f6-f7 h5-g5
f7-e8 g5-f5 e8-e7
23. Score: 1.8; Time: 2; nodes: 50869; PV: a1-b1 a7-b6 b1-c2 b6-b7 c2-d2 b7-c7
d2-d3 c7-b6 d3-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-h5 f6-f7 h5-g5
f7-e8 g5-f5 e8-e7 f5-e4
24. Score: 1.8; Time: 3; nodes: 64039; PV: a1-a2 a7-b6 a2-b3 b6-c7 b3-c3 c7-b6
c3-c2 b6-a6 c2-d2 a6-b6 d2-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-h5
f6-f7 h5-g5 f7-e8 g5-f5 e8-e7
25. Score: 1.8; Time: 3; nodes: 75500; PV: a1-b2 a7-b6 b2-c3 b6-b7 c3-d2 b7-c7
d2-d3 c7-b6 d3-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-h5 f6-f7 h5-g5
f7-e8 g5-f5 e8-e7 f5-e4 e7-d7 e4-f5
26. Score: 1.8; Time: 4; nodes: 83644; PV: a1-b2 a7-b6 b2-c3 b6-b7 c3-d2 b7-c7
d2-d3 c7-b6 d3-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-h5 f6-f7 h5-g5
f7-e8 g5-f5 e8-e7 f5-e4 e7-d7 e4-f5 d7-e7
I play a1-b2
Nodes: 83k; NPS: 21414; QNodes: 0; MO%: 98; FHA: 2; HC%: 55; Hash%: 58; NM%: 0;
egtb hits: 0; Ext's: 0; Total time searched: 3.906
(MO% = first-move fail-high percent; FHA isn't important; HC is the percent of
time the hash move causes a cutoff; Hash% is the percent of time I find the move
in the hash table; the rest is un-important)
(told you it was a long post)
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