Author: Harald Lüßen
Date: 13:48:17 04/04/04
Go up one level in this thread
On April 04, 2004 at 16:43:25, Uri Blass wrote: >On April 04, 2004 at 15:55:31, Uri Blass wrote: > >>On April 04, 2004 at 14:08:49, Robert Hyatt wrote: >> >>>On April 04, 2004 at 08:52:41, Eduard Nemeth wrote: >>> >>>>Endgame Testpostition >>>> >>>>The Game: >>>> >>>>[Event "4NCL West Bromwich ENG"] >>>>[Site "?"] >>>>[Date "2004.??.??"] >>>>[Round "5"] >>>>[White "Collinson, A."] >>>>[Black "King, D."] >>>>[Result "0-1"] >>>>[ECO "B50"] >>>>[WhiteElo "2390"] >>>>[BlackElo "2495"] >>>>[PlyCount "105"] >>>>[EventDate "2004.??.??"] >>>> >>>>1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Bd3 Nc6 5. Bc2 Bg4 6. d3 e6 7. Nbd2 Be7 8. h3 >>>>Bh5 9. Nf1 d5 10. Ng3 Bg6 11. Qe2 Qc7 12. Bg5 O-O-O 13. e5 Nh5 14. Bxe7 Qxe7 >>>>15. Nxh5 Bxh5 16. g4 Bg6 17. O-O-O d4 18. c4 h5 19. a3 Qc7 20. Rde1 hxg4 21. >>>>hxg4 Rxh1 22. Rxh1 a6 23. Ba4 Ne7 24. Nd2 b5 25. Bc2 Qb7 26. Rh2 Kc7 27. f4 Rb8 >>>>28. Qf3 Qxf3 29. Nxf3 Nc6 30. b3 Rf8 31. Nh4 Rh8 32. Kd2 f6 33. exf6 gxf6 34. >>>>Nf3 Rxh2+ 35. Nxh2 b4 36. a4 f5 37. Bd1 Kd6 38. Nf1 e5 39. gxf5 Bxf5 40. Ng3 >>>>Ke6 41. Bf3 Na5 42. Bd5+ Kf6 43. fxe5+ Kxe5 44. Kc2 Kf4 45. Nxf5 Kxf5 46. Be4+ >>>>Kf4 47. Bg2 Ke3 48. Be4 Ke2 49. Bg2 Nxb3 50. Bb7 Na1+ 51. Kb2 a5 52. Be4 Kd2 >>>>53. Kxa1 0-1 >>>> >>>>After move 49 white: >>>> >>>>Collinson,A - King,D >>>> >>>> >>>>[D]8/8/p7/n1p5/PpPp4/1P1P4/2K1k1B1/8 b - - 0 1 >>>> >>>>Nxb3! >>>> >>>>Great move by D. King. >>>> >>>> Eduard. >>> >>> >>>I don't believe this is a tough computer position. crafty finds this and sticks >>>with it after .12 seconds... >> >>I think that it is dependent on evaluation. >> >>There are programs that certainly have problems with that position including my >>program. >>The problem is wrong evaluation of pawn endgames or wrong evaluation of passed >>pawns. >> >>It seems to me based on looking at analysis of movei that the problem is wrong >>evaluation of pawn endgames. >> >>Uri > >It seems that Crafty also has a problem and the score drops to 0.00 if you get >depth 20 > >Here is some analysis by Crafty19.11 under chessbase(note that it is possible >that you will get different results with more tablebases but it is not that >crafty has superior knowledge) > >New game >8/8/p7/n1p5/PpPp4/1P1P4/2K1k1B1/8 b - - 0 1 > >Analysis by Crafty 19.11: > >1...Nxb3 > µ (-1.32) Depth: 1/4 00:00:00 >1...Nxb3 2.Bf1+ Kxf1 3.Kxb3 > µ (-0.87) Depth: 2/4 00:00:00 >1...Nxb3 2.Bf1+ Kxf1 3.Kxb3 > µ (-0.87) Depth: 3/6 00:00:00 >1...Nxb3 2.Bf1+ Kxf1 3.Kxb3 Ke2 > µ (-1.17) Depth: 4/7 00:00:00 >1...Nxb3 2.Kxb3 Kxd3 3.Bd5 Kd2 > µ (-1.29) Depth: 5/9 00:00:00 >1...Nxb3 2.Kxb3 Kxd3 3.Bb7 a5 4.Bd5 > µ (-1.25) Depth: 6/10 00:00:00 2kN >1...Nxb3 2.Kxb3 Kxd3 3.Bb7 a5 4.Bf3 Ke3 > µ (-1.31) Depth: 7/10 00:00:00 4kN >1...Nxb3 2.Kxb3 a5 3.Be4 Ke3 4.Bh7 Kd2 5.Be4 > +- (1.97) Depth: 8/11 00:00:00 7kN >1...Ke3 2.Be4 Kf2 3.Kb2 Ke2 4.Ka2 Kd2 5.Kb2 > = (0.17) Depth: 8/11 00:00:00 13kN >1...Ke3 2.Be4 Kf2 3.Kb2 Ke2 4.Ka2 Kd2 5.Kb2 Ke3 > ² (0.27) Depth: 9/12 00:00:00 18kN >1...Nxb3 > = (-0.23) Depth: 9/12 00:00:00 26kN >1...Nxb3 2.Kxb3 Kxd3 3.Bb7 a5 4.Bd5 Kd2 5.Be4 > -+ (-1.55) Depth: 9/12 00:00:00 35kN >1...Nxb3 2.Kxb3 Kxd3 3.Bb7 a5 4.Bd5 Kd2 5.Bf3 d3 6.Be4 > -+ (-1.55) Depth: 10/15 00:00:00 46kN >1...Nxb3 2.Kxb3 Kxd3 3.Bf1+ Kd2 4.Bh3 d3 5.Bf5 Ke3 6.Bxd3 Kxd3 > -+ (-1.70) Depth: 11/16 00:00:00 85kN >1...Nxb3 2.Kxb3 Kxd3 3.Bf1+ Kd2 4.a5 d3 5.Kb2 Ke3 6.Bxd3 Kxd3 7.Kb3 > -+ (-1.70) Depth: 12/20 00:00:00 143kN, tb=2 >1...Nxb3 2.Kxb3 Kxd3 3.Bf1+ Kd2 4.Bh3 d3 5.Bf5 a5 6.Kb2 Ke3 7.Bxd3 Kxd3 8.Kb3 > -+ (-1.76) Depth: 13/23 00:00:01 284kN, tb=2 >1...Nxb3 2.Kxb3 Kxd3 3.Bf1+ Kd2 4.Bh3 d3 5.Bf5 a5 6.Kb2 Ke3 7.Bxd3 Kxd3 8.Kb3 >Kd4 > -+ (-1.76) Depth: 14/23 00:00:01 541kN, tb=6 >1...Nxb3 2.Kxb3 Kxd3 3.Bf1+ Kd2 4.Bh3 d3 5.Bf5 a5 6.Kb2 Ke3 7.Bxd3 Kxd3 8.Kb3 >Kd4 > -+ (-2.16) Depth: 15/25 00:00:03 1346kN, tb=40 >1...Nxb3 2.Kxb3 Kxd3 3.Bf1+ Kd2 4.a5 d3 5.Kb2 Ke3 6.Bxd3 Kxd3 7.Kb3 Kd2 8.Kb2 >Ke3 9.Kb3 Kd3 > -+ (-1.70) Depth: 16/30 00:00:05 2415kN, tb=61 >1...Nxb3 2.Kxb3 Kxd3 3.Bf1+ Kd2 4.a5 d3 5.Bxd3 Kxd3 6.Ka4 Kd2 7.Kb3 Ke3 8.Kc2 >Ke2 9.Kb3 Kd2 10.Ka4 > -+ (-1.90) Depth: 17/30 00:00:08 4731kN, tb=149 >1...Nxb3 2.Kxb3 Kxd3 3.Bf1+ Kd2 4.a5 d3 5.Kb2 Ke3 6.Bh3 Kf2 7.Bg4 Ke1 8.Bf5 d2 >9.Bg4 > -+ (-1.80) Depth: 18/34 00:00:14 8139kN, tb=265 >1...Nxb3 2.Kxb3 Kxd3 3.Bf1+ Kd2 4.a5 d3 5.Kb2 Ke3 6.Bh3 Kf2 7.Bg4 Ke1 8.Bf5 Ke2 > -+ (-1.80) Depth: 19/34 00:00:27 14842kN, tb=654 >1...Nxb3 2.Kxb3 Kxd3 3.a5 Ke3 4.Kb2 d3 5.Bh3 Kf2 6.Bg4 Ke3 7.Bh3 > = (0.00) Depth: 20/36 00:00:47 26214kN, tb=1202 >1...Ke3 2.Be4 Kf2 3.Kb2 Kg3 4.Kc2 Kf4 5.Kb2 Ke5 6.Bd5 Kd6 7.Ka2 Nc6 8.Kb2 Ne5 >9.Kc2 a5 10.Be4 Nc6 11.Bd5 > = (-0.17) Depth: 20/36 00:01:54 69295kN, tb=1551 >1...Ke3 2.Be4 Kf4 3.Kb2 Ke5 4.Bd5 Kd6 5.Ka2 Kc7 6.Kb2 Kc8 7.Ka2 Kd7 8.Bf7 Nc6 >9.Bg6 a5 10.Be4 Kc7 11.Bd5 Kb6 > = (-0.17) Depth: 21/38 00:02:57 109216kN, tb=2516 > >(Blass, Tel-Aviv 04.04.2004) This is good news for my engine Elephant 1.02a: 0 70 0 4 Na5xb3 Kc2xb3 Ke2xd3 1 70 1 12 Na5xb3 Kc2xb3 Ke2xd3 2 70 1 33 Na5xb3 Kc2xb3 Ke2xd3 3 70 1 61 Na5xb3 Kc2xb3 Ke2xd3 4 76 1 112 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f1 Kd3-e4 5 80 1 252 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f1 Kd3-e4 Kb3-b2 Ke4-f5 6 80 3 326 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f1 Kd3-e4 Kb3-b2 Ke4-f5 7 78 3 521 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f1 Kd3-e4 Kb3-c2 a6-a5 Bf1-g2 Ke4-f5 Kc2-d2 Kf5-g4 Kd2-e2 b4-b3 Ke2-f2 8 74 3 1238 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f1 Kd3-e4 Kb3-c2 Ke4-e5 Kc2-d2 9 73 4 2595 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f1 Kd3-e4 Kb3-c2 a6-a5 Bf1-e2 Ke4-f5 Be2-f3 Kf5-f4 Bf3-h5 10 73 4 3037 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f1 Kd3-e4 Kb3-c2 a6-a5 Bf1-e2 Ke4-f5 Be2-f3 Kf5-f4 Bf3-h5 B 11 83 7 7909 Na5xb3 Kc2xb3 Ke2xd3 Kb3-b2 Kd3xc4 Bg2-f3 d4-d3 Bf3-d1 Kc4-d4 Kb2-b3 d3-d2 Bd1-c2 c5-c4 Kb3xb4 11 83 12 16741 Na5xb3 Kc2xb3 Ke2xd3 Kb3-b2 Kd3xc4 Bg2-f3 d4-d3 Bf3-d1 Kc4-d4 Kb2-b3 d3-d2 Bd1-c2 c5-c4 Kb3xb4 12 83 15 24629 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f3 Kd3-e3 Bf3-h5 d4-d3 Kb3-b2 a6-a5 Kb2-c1 Ke3-d4 Bh5-f7 b4-b3 Bf7-g8 Kd4-e5 Kc1-b2 13 71 20 37748 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f3 Kd3-e3 Bf3-h5 d4-d3 Kb3-b2 a6-a5 Kb2-c1 Ke3-d4 Bh5-f7 b4-b3 Bf7-g8 Kd4-e5 Kc1-b2 B 13 83 21 38365 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f3 Kd3-e3 Bf3-h5 d4-d3 Kb3-b2 a6-a5 Kb2-c1 Ke3-d4 Bh5-f7 b4-b3 Bf7-g8 Kd4-e5 Kc1-b2 13 83 21 38381 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f3 Kd3-e3 Bf3-h5 d4-d3 Kb3-b2 a6-a5 Kb2-c1 Ke3-d4 Bh5-f7 b4-b3 Bf7-g8 Kd4-e5 Kc1-b2 14 71 21 39025 Na5xb3 Kc2xb3 Ke2xd3 Bg2-f3 Kd3-e3 Bf3-h5 d4-d3 Kb3-b2 a6-a5 Kb2-c1 Ke3-d4 Bh5-f7 b4-b3 Bf7-g8 Kd4-e5 Kc1-b2 14 0 42 93914 Na5xb3 Kc2xb3 Ke2xd3 Bg2-b7 a6-a5 Kb3-b2 Kd3xc4 Bb7-c6 Kc4-d3 Bc6-b5 Kd3-e4 Bb5-f1 Ke4-f5 Bf1-d3 Kf5-e5 Bd3-b5 Ke5-e4 Bb5-f1 Ke4-f5 Bf1-d3 Kf5-e5 B 15 10 173 453565 Na5xb3 Kc2xb3 Ke2xd3 Bg2-b7 a6-a5 Kb3-b2 Kd3xc4 Bb7-g2 Kc4-d3 Bg2-f1 Kd3-e3 Kb2-c2 Ke3-f2 Bf1-h3 d4-d3 Kc2xd3 Kf2-f3 Bh3-f1 15 10 385 1023820 Na5xb3 Kc2xb3 Ke2xd3 Bg2-b7 a6-a5 Kb3-b2 Kd3xc4 Bb7-g2 Kc4-d3 Bg2-f1 Kd3-e3 Kb2-c2 Ke3-f2 Bf1-h3 d4-d3 Kc2xd3 Kf2-f3 Bh3-f1 15 42 537 1406343 Ke2-f2 Bg2-d5 Kf2-g3 Bd5-e6 Na5-c6 Be6-d5 Nc6-e5 a4-a5 Kg3-f2 Kc2-d2 Ne5-f3 Kd2-d1 Kf2-e3 Bd5-e4 Nf3-d2 Kd1-e1 16 41 581 1530067 Ke2-f2 Bg2-d5 Kf2-g3 Bd5-e6 Na5-c6 Be6-d5 Nc6-e5 a4-a5 Kg3-f2 Bd5-e4 Kf2-e3 Be4-f5 Ne5-f3 Bf5-d7 Nf3-e5 Bd7-f5 Ne5-f3 Bf5-d7 Nf3-e5 Bd7-f5 Ne5-f3 Bf5-d7 Nf3-e5 16 51 668 1774136 Ke2-e3 Bg2-d5 Ke3-f4 Bd5-g2 Kf4-e5 Bg2-h3 Na5-c6 Bh3-g2 Ke5-d6 Bg2-h3 a6-a5 Bh3-c8 Nc6-e5 Bc8-b7 Kd6-e6 Kc2-d2 17 41 675 1788926 Ke2-e3 Bg2-d5 Ke3-f4 Bd5-g2 Kf4-e5 Bg2-h3 Na5-c6 Bh3-g2 Ke5-d6 Bg2-h3 a6-a5 Bh3-c8 Nc6-e5 Bc8-b7 Kd6-e6 Kc2-d2 17 0 742 1982699 Ke2-e3 Bg2-e4 Ke3-f4 Be4-a8 Kf4-e5 Ba8-g2 Ke5-f4 Bg2-a8 Kf4-e5 Ba8-g2 Ke5-f4 Bg2-a8 Kf4-e5 Ba8-g2 Ke5-f4 Bg2-a8 Kf4-e5 Ba8-g2 Ke5-f4 Bg2-a8 Kf4-e5 Ba8-g2 Ke5-f4 Bg2-a8 B 18 10 825 2216179 Ke2-e3 Bg2-e4 Ke3-f4 Be4-a8 Kf4-e5 Ba8-d5 Ke5-d6 Kc2-d1 Na5xb3 Bd5-c6 18 7 825 2216607 Ke2-e3 Bg2-e4 Ke3-f4 Be4-a8 Kf4-e5 Ba8-d5 Ke5-d6 Kc2-d1 Na5xb3 Bd5-c6 18 10 828 2226749 Ke2-e3 Bg2-e4 Ke3-f4 Be4-a8 Kf4-e5 Ba8-d5 Ke5-d6 Kc2-d1 Na5xb3 Bd5-c6 19 0 834 2241994 Ke2-e3 Bg2-e4 Ke3-f4 Be4-a8 Kf4-e5 Ba8-d5 Ke5-d6 Kc2-d1 Na5xb3 Bd5-c6 19 0 846 2278862 Ke2-f2 Bg2-e4 Kf2-e3 Be4-g2 Ke3-f4 Bg2-h1 Kf4-e5 Bh1-g2 Ke5-f4 Bg2-h1 Kf4-e5 Bh1-g2 Ke5-f4 Bg2-h1 Kf4-e5 Bh1-g2 Ke5-f4 Bg2-h1 Kf4-e5 Bh1-g2 Ke5-f4 Bg2-h1 Kf4-e5 Bh1-g2 Ke5-f4 Bg2-h1 20 0 868 2347839 Ke2-f2 Bg2-e4 Kf2-e3 Be4-a8 Ke3-f4 Ba8-d5 Kf4-e5 Bd5-g2 Ke5-f4 Bg2-h1 Kf4-e5 Bh1-g2 Ke5-f4 Bg2-h1 Kf4-e5 Bh1-g2 Ke5-f4 Bg2-h1 Kf4-e5 Bh1-g2 Ke5-f4 Bg2-h1 Kf4-e5 Bh1-g2 Ke5-f4 Bg2-h1 Kf4-e5 B 21 10 1104 3058671 Ke2-f2 Bg2-e4 Kf2-g3 Kc2-b2 Kg3-f4 Be4-g6 Kf4-e5 Kb2-a2 Na5-c6 a4-a5 Nc6xa5 Ka2-b2 21 10 1110 3075495 Ke2-f2 Bg2-e4 Kf2-g3 Kc2-b2 Kg3-f4 Be4-g6 Kf4-e5 Kb2-a2 Na5-c6 a4-a5 Nc6xa5 Ka2-b2 22 0 1273 3545251 Ke2-f2 Bg2-e4 Kf2-g3 Kc2-b2 Kg3-f4 Be4-g6 Kf4-e5 Kb2-a2 Na5-c6 a4-a5 Nc6xa5 Ka2-b2 22 0 1312 3650856 Ke2-f2 Bg2-e4 Kf2-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 23 0 1437 4030313 Ke2-f2 Bg2-e4 Kf2-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 Kg4-g3 Kc2-b2 Kg3-g4 Kb2-c2 B 24 10 1998 5673751 Ke2-f2 Bg2-e4 Kf2-g3 Kc2-b2 Kg3-f4 Kb2-c2 Kf4-e5 Be4-h7 Na5-c6 Kc2-d2 a6-a5 Bh7-g8 Nc6-e7 Kd2-e2 24 0 2018 5725407 Ke2-f2 Bg2-e4 Kf2-g3 Kc2-b2 Kg3-f4 Kb2-c2 Kf4-e5 Be4-h7 Na5-c6 Kc2-d2 a6-a5 Bh7-g8 Nc6-e7 Kd2-e2 24 10 2050 5822607 Ke2-f2 Bg2-e4 Kf2-g3 Kc2-b2 Kg3-f4 Kb2-c2 Kf4-e5 Be4-h7 Na5-c6 Kc2-d2 a6-a5 Bh7-g8 Nc6-e7 Kd2-e2 25 0 2070 5876000 Ke2-f2 Bg2-e4 Kf2-g3 Kc2-b2 Kg3-f4 Kb2-c2 Kf4-e5 Be4-h7 Na5-c6 Kc2-d2 a6-a5 Bh7-g8 Nc6-e7 Kd2-e2 25 0 82917 218810704 Na5xc4 b3xc4 Ke2-f2 Bg2-d5 a6-a5 Kc2-b2 Kf2-e2 Bd5-f7 Ke2xd3 Bf7-d5 Kd3-e3 Kb2-b1 d4-d3 Kb1-c1 d3-d2 Kc1-d1 b4-b3 Bd5-e6 Ke3-d3 Be6-d7 Kd3xc4 Bd7-e6 Kc4-b4 Kd1xd2 c5-c4 Be6xc4 Kb4xc4 Kd2-c1 b3-b2 Kc1xb2 Kc4-b4 Kb2-c2 26 0 92250 244143233 Na5xc4 b3xc4 Ke2-f2 Bg2-d5 a6-a5 Kc2-b2 Kf2-e2 Bd5-f7 Ke2xd3 Bf7-d5 Kd3-e3 Kb2-b1 d4-d3 Bd5-e6 d3-d2 Kb1-c2 b4-b3 Kc2-d1 Ke3-d3 Be6-h3 Kd3xc4 Kd1-e2 d2-d1Q Ke2-f2 27 0 111159 295793575 Na5xc4 b3xc4 Ke2-f2 Bg2-d5 a6-a5 Kc2-b2 Kf2-e2 Bd5-f7 Ke2xd3 Bf7-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 28 0 133037 359333936 Na5xc4 b3xc4 Ke2-f2 Bg2-d5 a6-a5 Kc2-b2 Kf2-e2 Bd5-f7 Ke2xd3 Bf7-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 29 0 173728 479505417 Na5xc4 b3xc4 Ke2-f2 Bg2-d5 a6-a5 Kc2-b2 Kf2-e2 Bd5-f7 Ke2xd3 Bf7-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Ke3-d3 Be6-d5 Kd3-e3 Bd5-e6 Harald
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