Author: Robert Hyatt
Date: 08:20:44 01/18/04
Go up one level in this thread
On January 18, 2004 at 08:37:19, Harald Faber wrote:
>In my few idle time I am testing Shredder 8 on tournament level versus Junior 8
>(because I will operate Junior 8 in the computerchess tournament in Bernburg in
>March this year). While playing I became witness of this interesting game:
>
I have seen engines lose from +5 and draw from +8 on ICC. This includes
both commercial programs as well as mine. Draws are particularly easy to fall
into as with queens on the board, it might be 30 moves before the first
repetition occurs and programs simply can't see that every time...
Losing from +5 can be caused by several things, from a king attack to mis-
understanding a pawn ending.
That's why I mentioned my take on programs resigning in important games,
there is no benefit to resigning against a computer, and there is a potential
problem in that you might _still_ win. See Jonny vs Shredder for example,
although there are plenty of other examples floating around in past chess
games.
>[Event "Junior8 Vorbereitung, 120'/40+0'/0+60'"]
>[Site "CELERON1400"]
>[Date "2004.01.18"]
>[Round "2"]
>[White "Shredder 8"]
>[Black "Junior 8"]
>[Result "0-1"]
>[ECO "B66"]
>[Annotator "-0.12;-0.18"]
>[PlyCount "96"]
>[TimeControl "40/7200:0/0:3600"]
>
>{W=18.5 ply; 343kN/s B=18.1 ply; 1.137kN/s; 6.709 TBAs} 1. e4 {0} c5 {0} 2.
>Nf3 {0} d6 {0} 3. d4 {0} cxd4 {0} 4. Nxd4 {0} Nf6 {0} 5. Nc3 {0} Nc6 {0} 6. Bg5
>{0} e6 {0} 7. Qd2 {0} a6 {0} 8. O-O-O {0} h6 {0} 9. Be3 {0} Bd7 {0} 10. f4 {0}
>Qc7 {0} 11. Bd3 {0} b5 {0} 12. Kb1 {0} Na5 {0} 13. Qe1 {0} Nc4 {0} 14. Bc1 {0}
>b4 {0} 15. Nce2 {0} a5 {0} 16. h3 {Beide letzter Buchzug 0} a4 {-0.18/18 448}
>17. g4 {-0.12/17 0} a3 {0.00/17 367} 18. b3 {-0.12/19 0} Nb2 {0.03/17 186} 19.
>Bxb2 {0.37/20 806} axb2 {-0.02/18 2} 20. Qxb4 {0.48/21 1474} d5 {
>(Le7) 0.28/19 2} 21. Qc3 {0.60/19 317} Qb6 {(Da7) 0.21/18 352} 22. e5 {
>0.79/19 413} Ne4 {(Lb4) 0.25/18 2} 23. Bxe4 {0.72/19 487} dxe4 {0.55/17 213}
>24. f5 {0.92/19 470} Ba3 {(Da6) 0.55/17 171} 25. fxe6 {1.53/15 47} fxe6 {
>(Lxe6) 0.85/17 354} 26. Rhf1 {1.71/17 238} Rf8 {0.96/17 319} 27. Rxf8+ {
>(De3) 1.89/17 0} Kxf8 {(Lxf8) 0.94/16 268} 28. Qe3 {2.27/18 235} Kg8 {
>1.12/18 731} 29. Qxe4 {2.29/20 88} Rd8 {(Da5) 1.42/18 660} 30. g5 {
>(Sc3) 2.98/19 287} hxg5 {1.59/17 503} 31. Qg6 {(Sc3) 2.74/19 21} Bb5 {
>1.15/17 423} 32. c4 {(Dxg5) 2.32/19 13} Bc6 {0.79/17 277} 33. Qxe6+ {2.08/18 71
>} Kh8 {0.63/19 464} 34. Qg6 {(Df5) 1.45/19 326} Qc5 {0.23/15 60} 35. Qf5 {
>0.83/18 516} Bb7 {0.00/20 2} 36. h4 {0.58/18 199} Rf8 {(gxh4) 0.00/17 133} 37.
>Qxg5 {1.89/16 80} Be4+ {-0.04/17 92} 38. Nc2 {-0.42/19 558} Qf2 {-0.07/18 2}
>39. Ned4 {-0.42/19 313} Kg8 {-0.37/19 2} 40. Qg1 {-0.18/16 72} Qxh4 {
>-0.35/18 365} 41. e6 {-0.19/18 0} Rf2 {-0.94/18 194} 42. Qe1 {-0.34/18 0} Qf4 {
>(Lc5) -0.81/17 196} 43. b4 {-1.11/15 157} Kf8 {-2.26/17 85} 44. b5 {-2.60/13 51
>} Ke7 {-3.08/16 78} 45. Nc6+ {(c5) -4.27/14 153} Kxe6 {-4.58/16 244} 46. N6d4+
>{(c5) -6.86/16 846} Kf7 {-4.62/16 35} 47. c5 {-7.30/15 85} Bxc5 {-4.16/15 1}
>48. Kxb2 {-7.05/15 156} Bxd4+ {-4.05/16 2} 0-1
>
>Shredder 8 on a P4-2.53GHz and Junior 8 on my Celeron@1539MHz, both 256MB hash.
>A remarkable result, considerung that Shredder showed almost +3 in move 30 with
>search depth of 19.
>
>Position before 30.g5 +2.98/19:
>[D]3r2k1/3b2p1/1q2p2p/4P3/3NQ1P1/bP5P/PpP1N3/1K1R4 w - - 0 30
>
>Current standing is surprisingly 4-2 in favour of Junior.
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