Author: Oliver Roese
Date: 08:55:03 11/22/00
Go up one level in this thread
On November 22, 2000 at 10:17:21, Robert Hyatt wrote: >On November 22, 2000 at 00:41:00, Oliver Roese wrote: > >>On November 21, 2000 at 14:56:47, Robert Hyatt wrote: >> >>>On November 21, 2000 at 14:45:13, Oliver Roese wrote: >>> >>>>On November 21, 2000 at 03:25:00, Dann Corbit wrote: >>>> >>>>>[D]8/8/2Kp4/3P1B2/2P2k2/5p2/8/8 w - - bm Bc8; id "WAC.146"; >>>>> >>>>>Searched Move: b6+ >>>>>Right = 1/2 Stime = 10.9 Total NPS = 429381 <time_sq> = 120 <depth> = 20 >>>>> >>>>>White to Move Book Move(s): Bc8 >>>>> Test Position: "WAC.146" >>>>> 1. 2.46 0 78031 1. Bh3 >>>>> 1. 2.52 0 78036 1. Be6 >>>>> 1. 2.54 0 78037 1. Bd7 >>>>> 1. 2.54 0 78051 1. Bd7 >>>>> 2. 2.53 0 78062 1. Bd7 Ke5 >>>>> 2. ++ 0 78134 1. Bh7 >>>>> 2. 1.82 0 78343 1. Bd7 f2 >>>>> 2. 2.51 0 78365 1. Be6 Ke5 >>>>> 2. 2.52 0 78424 1. Bd3 Ke3 >>>>> 2. 2.52 0 78496 1. Bd3 Ke3 >>>>> 3. 2.55 0 78525 1. Bd3 Ke3 2. Bf5 >>>>> 3. ++ 0 78826 1. Bh7 >>>>> 3. 2.55 0 79404 1. Bd3 Ke3 2. Bf5 >>>>> 3. 2.55 0 80628 1. Bd3 Ke3 2. Bf5 >>>>> 4. 2.64 0 80953 1. Bd3 Ke3 2. c5 dxc5 >>>>> 4. 2.64 0 83123 1. Bd3 Ke3 2. c5 dxc5 >>>>> 5. 2.54 0 84780 1. Bd3 Ke3 2. Bf5 Kf4 3. Bd7 >>>>> 5. ++ 0 91118 1. Bc8 >>>>> 5. -- >>>>> 5. 2.54 0 94138 1. Bd3 Ke3 2. Bf5 Kf4 3. Bd7 >>>>> 5. 5.87 0 99653 1. Bc8 f2 2. Bh3 Kg3 3. Bf1 >>>>> 5. 5.87 0 116910 1. Bc8 f2 2. Bh3 Kg3 3. Bf1 >>>>> 6. -- >>>>> 6. ++ 0 117724 1. Bc8 >>>>> 6. 5.87 0 118439 1. Bc8 f2 2. Bh3 Kg3 3. Bf1 Kf4 >>>>> 6. 5.87 0 161237 1. Bc8 f2 2. Bh3 Kg3 3. Bf1 Kf4 >>>>> 7. 5.87 0 165796 1. Bc8 f2 2. Bh3 Ke3 3. Bf1 Kd4 >>>>> 7. ++ 0 186436 1. Bh3 >>>>> 7. -- >>>>> 7. 5.87 0 191756 1. Bc8 f2 2. Bh3 Kg3 3. Bf1 Kf4 4. Kxd6 >>>>> 7. 6.64 0 212491 1. Bh3 Kg3 2. Bf1 Kf2 3. Kxd6 Ke1 4. Bh3 >>>>> 7. 6.64 0 212520 1. Bh3 Kg3 2. Bf1 Kf2 3. Kxd6 Ke1 4. Bh3 >>>>> 8. -- >>>>> 8. ++ 0 221385 1. Bh3 >>>>> 8. 6.45 0 223648 1. Bh3 Kg3 2. Bf1 Kf2 3. Kxd6 Ke1 4. Bh3 f2 >>>>> 8. 6.45 0 223732 1. Bh3 Kg3 2. Bf1 Kf2 3. Kxd6 Ke1 4. Bh3 f2 >>>>> 9. 6.45 0 232656 1. Bh3 Kg3 2. Bf1 Kf2 3. Kxd6 Ke1 4. Bh3 f2 5. c5 >>>>> 9. ++ 0 264037 1. Bd3 >>>>> 9. 8.88 0 295723 1. Bd3 Ke3 2. c5 dxc5 3. d6 Kd2 4. d7 c4 5. d8=Q >>>>> 9. 8.88 0 304900 1. Bd3 Ke3 2. c5 dxc5 3. d6 Kd2 4. d7 c4 5. d8=Q >>>>> 10. ++ 0 314109 1. Bd3 >>>>> 10. 14.23 1 495219 1. Bd3 Ke3 2. c5 Kd4 3. cxd6 Kc3 4. d7 Kd2 5. d8=Q >>>>>Ke3 >>>>> 10. 14.23 1 525349 1. Bd3 Ke3 2. c5 Kd4 3. cxd6 Kc3 4. d7 Kd2 5. d8=Q >>>>>Ke3 >>>>> 11. ++ 1 529553 1. Bd3 >>>>> 11. 16.49 6 1363057 1. Bd3 Kg3 2. c5 Kf4 3. cxd6 Ke5 4. d7 Kf4 5. d8=Q >>>>>Ke3 >>>>> 11. 16.49 6 1393518 1. Bd3 Kg3 2. c5 Kf4 3. cxd6 Ke5 4. d7 Kf4 5. d8=Q >>>>>Ke3 >>>>> 12. ++ 6 1402113 1. Bd3 >>>>> 12. MATE+ 33 9555958 1. Bd3 f2 2. c5 Ke3 3. cxd6 Kxd3 >>>>> 12. MATE+ 33 9738198 1. Bd3 f2 2. c5 Ke3 3. cxd6 Kxd3 >>>>> >>>>>node_count = 9738198 quiescent nodes = 10482 eval_count = 4534996 >>>>>hash hits = 2251420 hash moves = 342378 pawn hash hits = 4522278 >>>>>node_rate = 290779 null cuts = 935545 exten = 747422 int_iter = 120 >>>>>egtb_probes = 267932 egtb_hits = 267932 fail_high(%) = 93 >>>> >>>>After 1.Bd3 black can force a repetition of the position with >>>>1...Ke3 2.Bf1 Kf2 3.Bh3 Kg3 4.Bf5 Kf4 (all forced) and white should soon come up >>>>with a better idea... >>>> >>>>Oliver >>> >>>When I play the above move, I get a mate score from crafty. ie: >>> >>>after Bd3, ... >>> (4) 17-> 51.30 -Mat40 1. ... Ke3 2. Bf1 Kf2 3. c5 Kxf1 4. >>> cxd6 <HT> >>> >>>(which comes from tablebases of course...) >>> >>>Kf2 then leads to a mate in 39... >>> >>>3. Bh3 is not the move for white however... that leads to a repetition. white >>>plays c5 to stay on the track to mating... Bh3 will also mate, but only after >>>going through the 2-fold repetition first, and wasting time... >> >>I apologize if i was wrong here, but i just cant get it. >>I saw 3.c5, but after 3...Kxf1 4.cxd6 f2 5.d7 K(e2) 6.d8=Q f1=Q a queen-ending >>with a pawn up for white follows. Could you (or Bruce Morland) give some further >>moves of the best line? Is it a forced queen swap or what?? >>If white simply waits for ...f2 with 1.Bc8 black will never get a queen. >>It is really hard to believe... >> >>Oliver > > >after the 3. ... Kxf1 cxd6 is a mate in 38.. > >Here is the complete variation after 4 moves: >5. d7! f2! 6. d8=Q! f1=Q! 7. Qb6! Qh1! 8. Qd4! Qf3 9. Qc5! Kd1 10. >Kb6! Qf6+! 11. d6! Qd8+! 12. Qc7! Qf6! 13. Qc6! Qb2+! 14. Qb5! Qd4+! >15. Qc5 Qf6! 16. Kc7! Qf4! 17. Qd5+! Ke1! 18. Kc8 Qc1+ 19. Kd8! Qe3 >20. d7! Kf1! 21. Qc4+! Kg1 22. Kc8! Qh3! 23. Kc7! Qh2+ 24. Kb7 Qg2+! >25. Qc6! Qg7! 26. Qc7 Qg2+! 27. Kb8! Qb2+! 28. Kc8! Qg2 29. Qa7+ >Kf1! 30. Qa1+! Ke2 31. Qb2+ Kf1 32. Qxg2+! Kxg2! 33. d8=Q! Kf2 34. >Qd3 Ke1 35. Qc2 Kf1 36. Kd7 Ke1 37. Ke6 Kf1 38. Kf5 Ke1 39. Kg4 Kf1 >40. Kf3! Ke1 41. Qe2# > >moves marked with a ! are the only optimal move in that position. Any other >move extends the mate or draws/loses... Thanks, but nothing abnormal to be find here. I still believe 1.Bc8 is better and will in the end give a shorter path to the mate. Uri Blass posted some while ago a position, where a computer, already a queen ahead, happily sacrificed it to get a won pawn ending. Something simliar might had happen here. Unfortunately i do not have enough tablebases installed to check this out. Oliver
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