Author: Robert Hyatt
Date: 19:50:56 04/19/04
Go up one level in this thread
On April 19, 2004 at 15:49:14, Andrew Williams wrote: >On April 18, 2004 at 19:56:25, Andrew Wagner wrote: > >Try searching longer. PM is getting this at ply 27 (78kns, 0.76 seconds) at the >moment, although I've seen it return the correct move at various different plies >over the years. > >Andrew Something might be wrong. It is a 26 ply combination to win a pawn, with no hash table at all... Hashing usually lets us hit the solution quicker. IE Crafty typically solves it at depth=18... > >> 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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