Author: Anthony Cozzie
Date: 07:34:00 11/05/02
Go up one level in this thread
On November 05, 2002 at 00:39:31, Will Singleton wrote:
>White to play, bm is d7. How long until your engine shows a positive score?
>(amd 1.6ghz).
>
>Amateur ply 15 score 33 secs 212
>Yace ply 15 score 9 secs 103
>Crafty ply 16 score 40 secs 69
>Ruffian ply 12 score 51 secs 5 (just amazing)
>
>[D]5kb1/6pp/p2P1p2/1p6/2r5/P1r2N1P/6P1/2R2RK1 w - - 0 36
>
>(remember, d7 must show a positive score)
>
>--------------------
>
>(following is background info)
>
>The above position came from a recent Lyapko League E game, Ldb_20c v
>Amateur_2.4. Amateur was cruising along nicely, until 35....Rec4. Just one of
>those positions that's a bit too deep, considering the machine (k6-450) and the
>time control. The best move is either 35...Rd3 or 35...Rxc1. I don't feel too
>bad about it, because even Yace would have played the same move, given the 4x
>speed diff:
>
>[D]5kb1/6pp/p2P1p2/1p6/4r3/P1r2N1P/6P1/2R2RK1 b - - 0 35
>
>yace (amd 1.6ghz):
>
>17865 <first : 10 107 906 7125647 t+ 1...Rec4 2.d7 Ke7 3.Rcd1 Kd8 4.Rfe1 Bf7
>5.Kf2 Rxa3 6.Kg3 {170}
>18326 <first : 10 108 952 7482553 t 1...Rec4 2.d7 Ke7 3.Rcd1 Kd8 4.Rfe1H Bf7H
>5.Re7H Rc1H 6.Ree1H R1c2H {90}
>19738 <first : 10 108 1093 8518595 . 1...Rec4 2.d7 Ke7 3.Rcd1 Kd8 4.Rfe1 Bf7
>5.Re7 Rc1 6.Ree1 R1c2 {90}
>22672 <first : 11 93 1386 10873676 t 1...Rec4 2.d7 Ke7 3.Rcd1 Kd8 4.Rfe1 Bf7
>5.Re7 Rc1 6.Ree1 Rxd1 7.Rxd1 {90}
>23123 <first : 11 94 1432 11269728 t+ 1...Rxc1 2.Rxc1 Bc4 3.Nd2 Rd4 4.Nxc4 bxc4
>5.d7 Ke7 6.d8=Q+ Kxd8 7.g3
>25396 <first : 11 107 1658 13166392 t 1...Rxc1 2.Rxc1 Bc4 3.Nd2 Rd4 4.Nxc4 bxc4
>5.a4 g5 6.Kf2 f5 7.Rc3 h5 {80}
>28831 <first : 11 108 2002 16214070 t+ 1...Rd3 2.Rfd1 Rxd1+ 3.Rxd1 Ke8 4.Nd4 Kd7
>5.Nf5 Bb3 6.Rd3 Re1+ 7.Kh2 Bc4 8.g3 {90}
>
>[Event "WB 08/2002 League E"]
>[Site "LYAPKO,Mukachevo,AMD K6-2/450"]
>[Date "2002.11.01"]
>[Round "15.2"]
>[White "Ldb_20c"]
>[Black "Amateur 2.4"]
>[Result "1-0"]
>[TimeControl "1800"]
>[ECO "C99"]
>[Opening "Ruy Lopez: closed, Chigorin, 12...c5d4"]
>
>1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8.
>c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4 Bb7 14. Nf1
>Rac8 15. Bd3 Nc6 16. Be3 Nb4 17. Ng3 Nxd3 18. Qxd3 Qc2 19. Qxc2 Rxc2 20.
>Nf5 Re8 21. Bg5 Rxb2 22. Bc1 Rc2 23. Ba3 Bf8 24. Bxd6 Nxe4 25. Bxf8 Kxf8
>26. Nxe5 Bc8 27. f3 Bxf5 28. fxe4 Be6 29. a3 f6 30. Nf3 Rc3 31. Rec1 Rec8
>32. Rf1 R8c4 33. d5 Bg8 34. d6 Rxe4 35. Rac1 Rec4 36. d7 Ke7 37. Rcd1 Kd8
>38. Rfe1 Bf7 39. Nd4 Rc1 40. Rxc1 Rxd4 41. Rc8+ Kxd7 42. Ra8 Bd5 43. Rxa6
>Ra4 44. Rxa4 bxa4 45. h4 g6 46. Kf2 f5 47. h5 Bc6 48. h6 Kd6 49. Rd1+ Kc7
>50. g3 Be4 51. g4 g5 52. Ke3 Kc6 53. Rf1 Kd7 54. gxf5 Bc2 55. Kd4 g4 56.
>Ke5 Ke8 57. Rc1 Bb3 58. Rc8+ Kd7 59. Rh8 g3 60. Rxh7+
>{Black resigns} 1-0
Aside from some annoying search instability, zappa picks d7 immediately and sees
it as winning at ply 13 (1:18).
At depth 16 it sees white as winning the exchange for the d7 pawn.
1. d7 Ke7 2. Rfd1 Kd8 3. Rxc3 Rxc3
= (-0.72) Depth: 5 00:00:00.19 25kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Nd2 Ra4
= (-0.91) Depth: 6 00:00:01.56 82kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Nd2 Ra4 5. Kh1
= (-0.91) Depth: 7 00:00:02.37 248kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Re7 Rxf3 5. Rxf7
= (-0.90) Depth: 8 00:00:03.21 524kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rd6 Rxa3 4. Ne5 Rc2 5. Nc6 Rxc6 6. Rxc6
= (-0.99) Depth: 9 00:00:05.25 1511kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rd6 Rxa3 4. Ne5 Rc2 5. Nc6 Rxc6 6. Rxc6 Kxd7
= (-0.99) Depth: 10 00:00:08.49 3039kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rd6 Rc7 4. Rxa6 Rxd7 5. Ra8 Rc8 6. Rxc8 Kxc8 7. Kf2 Bf7
= (-1.00) Depth: 11 00:00:16.27 6827kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Kh1 Bh5 5. Rd5 Rxf3 6. Rxh5 Rd3 7. Rxh7
= (-1.17) Depth: 12 00:00:54.17 24746kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Nd4 Rxa3 5. Re7 Rc6 6. Nxc6 Kc7 7. Rxf7
+ (-0.92) Depth: 13 00:01:10.75 32681kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Nd4 Rxd4 5. Rxd4 Rxa3 6. Rde4 Ba2 7. Re7
Rg3
= (0.19) Depth: 13 00:01:18.31 36252kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Nd4
- (-0.06) Depth: 14 00:01:40.59 46808kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Nd4 Rxd4 5. Rxd4 Rxa3 6. Rde4 Ba2 7. Re7
Rg3 8. Kf2
= (0.29) Depth: 14 00:01:48.44 50526kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Nd4 Rxd4 5. Rxd4 Rxa3 6. Re7 Kxe7 7. d8=Q
Ke6
+ (0.54) Depth: 15 00:02:02.52 57720kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Nd4 Kxd7 5. Nxb5 Kc6 6. Nxc3 Rxc3 7. Re7
Bb3 8. Rde1 Rg3 9. Kf2
= (0.77) Depth: 15 00:02:37.45 73936kN
1. d7 Ke7 2. Rcd1 Kd8 3. Rfe1 Bf7 4. Nd4 Kxd7 5. Nxb5 Kc6 6. Nxc3 Rxc3 7. Re7
Bb3 8. Rb1 Bc2 9. Rb2 g5
= (0.80) Depth: 16 00:03:57.35 111250kN
Time: 285671ms, Nodes: 134431k, Quiescence Nodes: 40838k [30%]
Table Hits: 25702k [19%], Table Pings: 37436k [28%], NPS: 471k, Null Cuts: 3294k
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