Author: Miguel A. Ballicora
Date: 07:56:42 02/28/01
Go up one level in this thread
On February 28, 2001 at 10:16:39, Robert Hyatt wrote:
>On February 28, 2001 at 04:10:58, Frank Phillips wrote:
>
>>Below is one of several of games I lost to Comet (utuerke on chess.net) in
>>impressive style. My program played into the following position, assessing it
>>as positive for white, only to lose very quickly after Qa6. Qb7 might have held
>>on longer. I would be interested in other programs static evaluation for the
>>given position. To my untutored eye, the material balance does not look bad for
>>white.
>>
>>[D]4r1k1/Q2b1p1p/1n4p1/3P4/3bq3/6B1/PP3PPP/R4RK1 w - -
>>
>>
>>[Event " "]
>>[Site "localhost"]
>>[Date "2001.02.27"]
>>[Round " "]
>>[White "Searcher"]
>>[Black "utuerke"]
>>[Result "0-1"]
>>[WhiteElo "0"]
>>[BlackElo "0"]
>>[TimeControl "300+3"]
>>
>>1. e4 c5 2. Nf3 Nc6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. cxd4 d6 7. Bc4 Nb6 8.
>>Bb5 dxe5 9. Bxc6+ bxc6 10. Nxe5 g6 11. Nc3 Qd6 12. O-O Bg7 13. Bf4 Nd5 14.
>>Bg3 O-O 15. Qa4 Nb6 16. Nxc6 Qf6 17. Qb5 Bd7 18. d5 Rfe8 19. Qc5 Rac8 20.
>>Ne4 Qf5 21. Nxe7+ Rxe7 22. Qxe7 Re8 23. Qa3 Qxe4 24. Qxa7 Bd4 25. Qa6 Qxd5
>>26. Rfd1 Nc4 27. Rac1 Bc6 28. Qxc6 Qxc6 29. b3 Qe4 30. bxc4 Bb2 31. Rb1 Ba3
>>32. c5 Bxc5 33. h3 Ba3 34. Rb5 Qe2 35. Rbd5 Qxa2 36. R1d2 Re1+ 37. Kh2 Qa1
>>38. Bf4 Be7 39. Kg3 h5 40. Kf3 Qa4 41. Be3 Qc6 42. Rd4 Bg5 43. Kg3 Bxe3 44.
>>fxe3 Rxe3+ 45. Kf2 Re6 46. Rd1 Qc2+ 47. Kg3 Re2 48. Rd8+ Kg7 49. Rg1 Qc7+
>>50. Kf3 Qe5 51. Rd3 h4 52. Re3 Qxe3+ 53. Kg4 Qg3#
>>0-1
>
>
>A static eval here (crafty) is very close to zero. A very short search says
>-1.5 (good for black).
Interesting position to see examine eval.
My humble program, Gaviota thinks it is +1 for white, after an 8 ply search
thinks that chances are leveled (-0.01)
Ply: 8
Qa7-b7 Bd7-b5 Rf1-d1 Bb5-a4 b2-b3 Ba4-d7 a2-a3 Re8-a8
Score: -0.01 (-2) Evals: 1582874 Time: 25.0s nps: 100451 Q/all: 0.19
nodes cutoffs missed tree_exp
path 2038792 492570 80436 1.16
quies 468973 258500 23412 1.09
all 2507765 751070 103848 1.14
hashtable= attempts: 2038830 hits: 8.2% perfect: 4.3%
Accum. TOTAL--> Time: 41.04s Nodes: 4100890 nps: 99927
Time for total analysis: 41.04
Regards,
Miguel
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