Author: Richard Pijl
Date: 07:23:07 01/09/03
Go up one level in this thread
On January 09, 2003 at 10:04:42, Andrew Williams wrote:
>On January 09, 2003 at 09:49:57, Uri Blass wrote:
>
>>On January 09, 2003 at 09:35:16, Andrew Williams wrote:
>>
>>>Hi,
>>>
>>>Last night I was looking at a game between Hossa and PostModernist. PM lost
>>>after it took the pawn on a2 in this position:
>>>
>>>[D]r3r1k1/pbpp1pp1/1p3n1p/8/q1PPp3/2P1P1P1/P2BQP1P/1R2RBK1 b - - 0 19 am Qxa2
>>>
>>>
>>>How long does it take your program to ignore the Pawn here? Even after five
>>>minutes thinking, PM still wants to take it. The full game follows:
>>>
>>>[Event "ICC 20 5"]
>>>[Site "Internet Chess Club"]
>>>[Date "2003.01.03"]
>>>[Round "-"]
>>>[White "Hossa"]
>>>[Black "PostModernist"]
>>>[Result "1-0"]
>>>[ICCResult "Black resigns"]
>>>[WhiteElo "2303"]
>>>[BlackElo "2356"]
>>>[Opening "English: four knights, kingside fianchetto"]
>>>[ECO "A29"]
>>>[NIC "EO.04"]
>>>[Time "05:12:05"]
>>>[TimeControl "1200+5"]
>>>
>>>1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Nd4 5. Bg2 Nxf3+ 6. Bxf3 Bb4 7. d4 e4
>>>8. Bg2 O-O 9. Bg5 Re8 10. O-O Bxc3 11. bxc3 h6 12. Bf4 b6 13. Re1 Bb7 14.
>>>Rb1 Nh5 15. Bd2 Qf6 16. Bh3 Qc6 17. e3 Nf6 18. Qe2 Qa4 19. Bf1 Qxa2 20. Ra1
>>>Qb3 21. Reb1 Qc2 22. Rc1 Qb3 23. Be1 Nd5 24. Rc2 d6 25. Rb2 Qxb2 26. Qxb2
>>>Nf6 27. c5 dxc5 28. dxc5 Red8 29. c4 Nd7 30. cxb6 cxb6 31. Bb4 Bc6 32. Bh3
>>>f6 33. Bd6 Re8 34. Ra6 Ne5 35. c5 Bd5 36. Bxe5 Rxe5 37. cxb6 axb6 38. Rxa8+
>>>Bxa8 39. Qxb6 Bd5 40. Qb8+ Kh7 41. Bd7 h5 42. Qc8 Kg6 43. Qf8 Bc4 44. Be8+
>>>Kh7 45. Bf7 Bxf7 46. Qxf7 Kh6 47. Kg2 Rb5 48. h3 Rg5 49. Qg8 Re5 50. g4 hxg4
>>>51. hxg4 Kg6 52. Kg3 Kh6 53. Kf4 Kg6 54. Qc4 Kh6 55. Qf7 Kh7 56. Qc7 Rg5 57.
>>>Kxe4 Kg6 58. Qd7 Re5+ 59. Kd4 Ra5 60. f4 Ra1 61. Qe8+ Kh7 62. g5 fxg5 63.
>>>fxg5 Rd1+ 64. Kc5 {Black resigns} 1-0
>>>
>>>
>>>Andrew
>>
>>Easy for movei.
>>Movei see that Qxa2 only draws at depth 10 after less than 10 seconds so it
>>changes it's mind to another move.
>>
>
>I don't think it draws. I believe it loses horribly.
If I force Qxa2 in the Baron, it takes (on a PII-500) about 8 minutes to show a
good score for white. Before that the score was drawish:
ply time nodes score pv
4( 5)& 0 2677 -97 b1a1 a2c2 e2d1 c2d1
4( 5)& 0 4177 -95 f1g2 d7d5 c4d5 f6d5 e1d1
4( 5)& 0 6202 -85 f1h3 a7a5 h3f5 a2b3
4( 5). 0 6202 -85 f1h3 a7a5 h3f5 a2b3
5( 7)& 0 13751 -97 f1h3 d7d5 c4d5 b7d5 h3f5 a2b3
5( 8)& 0 24718 -68 b1a1 a2b3 e1b1 b3c2 f1g2
5( 8). 0 24718 -68 b1a1 a2b3 e1b1 b3c2 f1g2
6( 7)& 0 32893 -75 b1a1 a2b2 e1b1 b2c2 e2d1 c2d1
6( 8)& 0 48516 -74 e1c1 a7a5 e2d1 d7d6 c1c2 a2a3
6( 9)& 0 68001 -73 e1d1 a2a5 b1b5 a5a4 f1g2 d7d5
6( 9). 0 76590 -73 e1d1 a2a5 b1b5 a5a4 f1g2 d7d5
7(11)& 1 155625 -84 e1d1 d7d6 b1a1 a2c2 d1c1 c2b2 f1g2
7(11)& 2 182124 -69 b1a1 a2b3 e1b1 b3c2 b1c1 c2b2 c1b1 b2c2 <rep>
7(11). 2 190208 -69 b1a1 a2b3 e1b1 b3c2 b1c1 c2b2 c1b1 b2c2 <rep>
8(10)+ 2 239464 -34 b1a1 a2b3 e1b1 b3c2 b1c1 c2a4
8(10)& 2 250394 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
8(10). 2 259413 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
9(13)- 3 353117 -35 b1a1 a2b2 e1c1 a7a6 e2d1
9(13)& 4 399832 -35 b1a1 a2b2 e1b1 b2c2 e2d1 c2d1 b1d1
9(13). 4 399858 -35 b1a1 a2b2 e1b1 b2c2 e2d1 c2d1 b1d1
10(13)+ 5 568285 0 b1a1 a2b2 e1b1 b2c2 b1c1 c2b3 c1b1 b3c2 <rep>
10(13)& 5 593947 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
10(14). 6 647624 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
11(15)& 8 940933 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
11(15). 10 1102013 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
12(22)& 46 4543837 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
12(22). 56 5485941 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
13(21)& 117 11236269 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
13(21). 146 14006096 0 b1a1 a2b3 e1b1 b3c2 b1c1 c2b3 c1b1 <rep>
14(23)+ 239 22183609 35 b1a1 a2b3 e1b1 b3c2 b1c1 c2d2 e2d2 f6g4
14(24)& 484 42965262 120 b1a1 a2b3 e1b1 b3c2 b1c1 c2c1 d2c1 f6g4
14(24). 638 55906104 120 b1a1 a2b3 e1b1 b3c2 b1c1 c2c1 d2c1 f6g4
>
>>Does PM want to take the pawn with positive score?
>
>Yes.
>
>>
>>Uri
>
>Thanks for your response.
>
>Andrew
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