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Subject: Re: Interesting test position

Author: Daniel Shawul

Date: 08:59:56 10/20/05

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On October 20, 2005 at 11:46:34, Robert Hyatt wrote:

>Here is the PGN for a blitz game Crafty played on ICC (ignore the pgn headers, I
>fabricated them when annotating the game, I believe the game was a 5 0 blitz).
>
>[Event "?"]
>[Site "?"]
>[Date "2005.10.18"]
>[Round "?"]
>[White "Crafty 20.1"]
>[WhiteElo ""]
>[Black "unknown"]
>[BlackElo ""]
>[Result "*"]
>
>1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 c5 5. d5 h6 6. Bh4 Bxc3+
>7. bxc3 d6 8. e3 e5 9. Bd3 e4 10. Bc2 Qe7 11. Bxf6 Qxf6 12. Ne2
>Qe5 13. Qb1 Nd7 14. Bxe4 O-O 15. Bd3 Nf6 16. Qc2 a6 17. a4 Bg4
>18. Rb1 b5 19. axb5 axb5 20. Rxb5 Bxe2 21. Kxe2 Rfe8 22. h3
>Nh5 23. Kd2 Qg5 24. Rg1 Qf6 25. Rf1 Qe5 26. Rb7 Nf6 27. Rbb1
>Qh2 28. Rg1 Nd7 29. Rbf1 Ne5 30. Ke2 Nxd3 31. Kxd3 Qe5 32. Kd2
>Qf6 33. f4 Ra3 34. Re1 Qd8 35. Re2 Qa5 36. Rb1 Ra4 37. Kd3 f6
>38. Rb5 Qa6 39. Qb3 Ra3 40. Qb2 Ra4 41. e4 Kh7 42. Qc2 Kg8 43. Qb3
>Ra3 44. Qb2 Ra4 45. Qc2 Kh8 46. Qb3 Ra3 47. Qb2 Ra4 48. Qb3
>Ra3 49. Qb2 Ra4 50. h4 h5 51. f5 Kh7 52. Qb1 Ra1 53. Rb6 Qa5
>54. Qb3 Ra3 55. Rb5 Qa6 56. Qc2 Ra1 57. Rb1 Kh8 58. Ree1 Ra2
>59. Qd1 Kg8 60. Qxh5 Ra8 61. Qg4 Ra4 62. e5 dxe5 63. Qe4 Ra3
>64. Rb5 Qa4 65. d6 Ra2 66. Rc1 Rf2 67. Rxc5 Qa2 68. Qe1 Rd8
>69. Ke3 Rxg2 70. Rd1 Rh2 71. Rd2 Rh3+ 72. Ke4 Qa8+ 73. Rdd5
>Rxd6 74. Qb1 Rxd5 75. Rxd5 Qc8 76. Qb5 Rxh4+ 77. Ke3 Qxf5 78. Rd8+
>Kh7 79. Qb3 Qf4+ 80. Kd3 Rh2 81. Rh8+ Kxh8 82. Qd1 e4+ 83. Kd4
>Qd6+ 84. Ke3 Qxd1 85. Kxe4 Rf2 86. c5 *
>
>
>The interesting stuff starts around move 65.  White played d6 with an eval of
>+3.20.  Let your program search there to see what it likes.  The longer you
>search, the more the score should drop.
>
>If it doesn't follow the game another move and try again.  Crafty's scores
>looked like this:
>
>move 66:  +3.15, 67: +2.41, 68: +1.59, 69: +.62, 70: 0.00, 71: -.39, 72: 0.00,
>73: 0.00, 74: -1.33, 75: -2.76, 76: -2.75, 77: -12.0, 78: -13.66, etc.
>
>I first thought I had some sort of bug, but after playing back through the
>position, this is less a bug and more just missing deep tactics.  Would be
>interesting to see what kinds of scores at different depths other programs see
>starting at move 66...

scorpio didnt like moves of crafty at 66,67
but it plays move 68 Qe1 with a negative score (where crafty says 1.59)
FEN: r5k1/6p1/3P1p2/2R1pP2/2P1Q2P/2PK4/q4rP1/2R5 w - - 1 68

Scorpio 1.6:
   1	00:00	         106	106	-M1	Rc5xe5 Qa2-d2
   1	00:00	         113	113	-3.23	Qe4xa8 Qa2xa8 d6-d7 Kg8-h7 Rc5-c8 e5-e4 Kd3-e3
Qa8-a7 Rc8-c5
   1	00:00	         285	285	+0.22	Qe4-d5 Kg8-h8 Kd3-e3 Rf2xg2 Rc1-c2 Rg2xc2
d6-d7 Rc2xc3 Ke3-e4 Rc3xc4 Rc5xc4
   1	00:00	         299	299	+0.45	Qe4-e3 Rf2xg2 d6-d7 Ra8-f8
   2	00:00	         415	415	+0.45	Qe4-e3 Rf2xg2 d6-d7 Ra8-f8
   3	00:00	       1.399	1.399	-2.18	Qe4-e3 Ra8-d8 Rc5-c6 Rf2xg2 Kd3-e4
   3	00:00	       3.277	327.700	+0.11	Qe4-e1 Ra8-d8 Rc5-c6 Rf2xg2 Kd3-e4
   4	00:00	       5.475	547.500	+0.11	Qe4-e1 Ra8-d8 Rc5-c6
   5	00:00	      14.991	374.775	-0.39	Qe4-e1 Ra8-d8 Rc5-c6 Rf2xg2 Qe1-e3
   5	00:00	      34.342	381.577	-0.76	Qe4-e1 e5-e4 Kd3-e3 Rf2xg2 Rc1-d1 Rg2-g4
   6	00:00	      56.454	403.242	-0.25	Qe4-e1 e5-e4 Kd3-e3 Rf2xg2 Rc1-d1 Rg2-g4
   6	00:00	      63.004	420.026	+0.18	Qe4-e1 e5-e4 Kd3-e3 Rf2xg2 Rc1-d1 Qa2-c2
Ke3-d4
   7	00:00	     122.283	489.132	+0.13	Qe4-e1 Ra8-d8 Rc5-d5 Rf2xg2 Qe1-e3
   8	00:00	     235.564	547.823	+0.04	Qe4-e1 Ra8-d8 Rc5-c6 Rf2xg2 Qe1-e3 Rg2-g4
   9	00:01	     431.990	568.407	-0.46	Qe4-e1 Ra8-d8 Rc5-c6 e5-e4 Kd3-e3 Kg8-h8
   9	00:02	   1.047.873	578.935	-0.68	Qe4-e1 Ra8-d8 Rc5-a5 e5-e4 Kd3-e3 Qa2xa5
Ke3xf2 Qa5xf5 Kf2-g1 Rd8xd6
  10	00:04	   2.173.739	607.189	-0.18	Qe4-e1 Ra8-d8 Rc5-a5 e5-e4 Kd3-e3 Qa2xa5
Ke3xf2 Qa5xf5 Kf2-g1 Rd8xd6 Qe1-f2
  10	00:04	   2.357.576	554.723	-0.47	Qe4-e1 Ra8-d8 Rc5-a5 Rd8xd6 Kd3-e3 Qa2xa5
Ke3xf2 Qa5-c5 Kf2-g3 Qc5xc4 Qe1-e3 Kg8-f7
  11	00:08	   4.958.961	583.407	-0.57	Qe4-e1 Ra8-d8 Rc5-a5 Rd8xd6 Kd3-e3 Qa2xa5
Ke3xf2 Qa5-c5 Kf2-f1 Qc5xc4 Kf1-g1 Qc4-f4 Rc1-b1 Qf4xf5 Rb1-b8 Kg8-f7
  12	00:16	  10.123.042	613.517	-0.57	Qe4-e1 Ra8-d8 Rc5-a5 Rd8xd6 Kd3-e3 Qa2xa5
Ke3xf2 Qa5-c5 Kf2-f1 Qc5xc4 Kf1-g1 Qc4-f4 Rc1-b1 Qf4xf5 Rb1-b8 Kg8-f7





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