Author: Uri Blass
Date: 12:11:38 11/14/03
Go up one level in this thread
On November 14, 2003 at 14:24:52, Jorge Pichard wrote:
>On November 14, 2003 at 14:10:11, Uri Blass wrote:
>
>>The trap was suggested by a poster in the israeli chess forum.
>>Kasparov could play 31...Rf6 and the question is if Fritz could avoid 32.Qxb7
>>
>>[Event "?"]
>>[Site "?"]
>>[Date "?"]
>>[Round "-"]
>>[White "?"]
>>[Black "?"]
>>[Result "*"]
>>
>>1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. c3 g6 6. O-O Bg7 7. Nbd2 O-O 8.
>>Re1 Re8 9. d4
>>{
>>White last book move
>>}
>>9... Bd7 10. d5 Ne7 11. Bxd7 Nxd7 12. a4 h6 13. a5 a6 14. b4 f5 15. c4 Nf6
>>16. Bb2 Qd7 17. Rb1 g5 18. exf5 Qxf5 19. Nf1 Qh7 20. N3d2 Nf5 21. Ne4 Nxe4
>>22. Rxe4 h5 23. Qd3 Rf8 24. Rbe1 Rf7 25. R1e2 g4 26. Qb3 Raf8 27. c5 Qg6
>>28. cxd6 cxd6 29. b5 axb5 30. Qxb5 Bh6 31. Qb6 Rf6 32. Qxb7 Ne3 33. R4xe3
>>Bxe3 34. Nxe3 Qd3 35. Bxe5 Qxe2 36. Bxf6 Rxf6 37. Qc8+ Kg7
>>*
>>
>>
>>Note that yace does not fall into that trap and prefers 32.Qc7 but my Fritz
>>likes Qxb7 inspite of seeing nagative score for that move.
>>
>>analysis on A1000
>>
>>
>>[D]5rk1/1p6/1Q1p1rqb/P2Ppn1p/4R1p1/8/1B2RPPP/5NK1 w - - 0 1
>>
>>Analysis by Yace Paderborn:
>>
>>32.Bxe5 dxe5 33.Qxb7
>> µ (-0.80) Depth: 1 00:00:00
>>32.Qxb7
>> +- (1.47) Depth: 1 00:00:00
>>32.Qxb7
>> +- (1.47) Depth: 1 00:00:00
>>32.Qxb7 Qf7
>> ± (1.29) Depth: 2 00:00:00
>>32.Qxb7 Qf7
>> ± (1.29) Depth: 2 00:00:00
>>32.Qxb7 R8f7 33.Qc8+ Kh7
>> ± (1.40) Depth: 3 00:00:00
>>32.Qxb7 R8f7 33.Qc8+ Kh7
>> ± (1.40) Depth: 3 00:00:00
>>32.Qxb7 R6f7 33.Qc6 Qf6
>> ± (1.31) Depth: 4 00:00:00
>>32.Qxb7 R6f7 33.Qc6 Qf6
>> ± (1.31) Depth: 4 00:00:00
>>32.Qxb7 Ng7 33.Rc4 Qd3 34.Rcc2
>> ± (1.30) Depth: 5 00:00:00
>>32.Qxb7 Ng7 33.Rc4 Qd3 34.Rcc2
>> ± (1.30) Depth: 5 00:00:00
>>32.Qxb7 R6f7 33.Qb5 Ne7 34.Ng3 Bg5
>> ± (1.29) Depth: 6/15 00:00:00 69kN
>>32.Qxb7 R6f7 33.Qb5 Ne7 34.Ng3 Bg5
>> ± (1.29) Depth: 6/16 00:00:00 102kN
>>32.Qxb7 Qf7 33.Qxf7+ R6xf7 34.Rb4 Ne7 35.Rb6 Nxd5 36.Rxd6
>> ± (1.04) Depth: 7/16 00:00:01 242kN
>>32.Qxb7 Qf7 33.Qxf7+ R6xf7 34.Rb4 Ne7 35.Rb6 Nxd5 36.Rxd6
>> ± (1.04) Depth: 7/20 00:00:01 354kN
>>32.Qxb7 Qf7 33.Qxf7+ R6xf7 34.Rb4 Ra8 35.Rb5 Bg5 36.Rc2 Raf8
>> ± (1.04) Depth: 8/20 00:00:02 700kN
>>32.Qxb7 Qf7 33.Qxf7+ R6xf7 34.Rb4 Ra8 35.Rb5 Bg5 36.Rc2 Raf8
>> ± (1.04) Depth: 8/26 00:00:04 1045kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Re1 R6f7 36.Qc6 Rxf2
>> ± (1.00) Depth: 9/26 00:00:08 2493kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Re1 R6f7 36.Qc6 Rxf2
>> ± (1.00) Depth: 9/26 00:00:10 3250kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Re1 Qd2 36.Bxe5 Qxe1+ 37.Nf1
>> ² (0.60) Depth: 10/27 00:00:13 4440kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 Qxe2 36.Bxf6 Qe1+ 37.Nf1 Rxf6
>>38.Qc8+ Kh7
>> ² (0.45) Depth: 10/30 00:00:19 6204kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 Qxe2 36.Bxf6 Qe1+ 37.Nf1 Rxf6
>>38.Qc8+ Kh7
>> ² (0.45) Depth: 10/30 00:00:31 9566kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 Qxe2 36.Bxf6 Rxf6 37.Qc8+ Kg7
>>38.Qd7+ Kg6 39.Qe8+ Kg5 40.Qg8+ Kh4
>> ² (0.30) Depth: 11/39 00:00:49 15759kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 Qxe2 36.Bxf6 Rxf6 37.Qc8+ Kg7
>>38.Qd7+ Kg6 39.Qe8+ Kg5 40.Qg8+ Kh4
>> ² (0.30) Depth: 11/39 00:01:29 28821kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 Qxe2 36.Bxf6 Rxf6 37.Qc8+ Kg7
>>38.h3 Rxf2 39.Qb7+ Kg6 40.Nxg4
>> = (-0.10) Depth: 12/39 00:02:05 41785kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 Qxe2 36.Bxf6 Rxf6 37.Qc8+ Kg7
>>38.Qc7+ Kh6 39.Qc2 Qe1+ 40.Nf1 Qxa5
>> ³ (-0.52) Depth: 12/41 00:03:02 60532kN
>>32.Qc7 Qf7 33.Qxf7+ R6xf7
>> ³ (-0.51) Depth: 12/43 00:12:41 225354kN
>>32.Qc7 Qf7 33.Qxf7+ R6xf7 34.Rc4 Ne7 35.Ng3 Nxd5 36.Nxh5 Nf4 37.Nxf4 Bxf4 38.Ba3
>>Rd8 39.Rec2
>> = (-0.14) Depth: 12/43 00:16:33 282219kN
>>
>>(Blass, Tel-Aviv 14.11.2003)
>>
>>
>>5rk1/1p6/1Q1p1rqb/P2Ppn1p/4R1p1/8/1B2RPPP/5NK1 w - - 0 1
>>
>>Analysis by Fritz 8:
>>
>>32.Qxb7 h4 33.Qb4 g3 34.Rg4 gxf2+ 35.Rxf2 Bg5
>> ± (1.19) Depth: 7/22 00:00:00 67kN
>>32.Qxb7 Qf7 33.Qxf7+ Kxf7 34.Rc2 Ra8 35.Ra4 h4 36.a6
>> ± (0.94) Depth: 8/25 00:00:01 396kN
>>32.Qxb7 Qf7 33.Qxf7+ Kxf7 34.Ng3 Nxg3 35.hxg3 Ra8 36.Ra4 Ra6 37.Rc2
>> ± (0.91) Depth: 9/28 00:00:02 736kN
>>32.Qxb7 Qf7 33.Qxf7+ Kxf7 34.Ng3 Nxg3 35.hxg3 Ra8 36.Ra4 Ra6 37.Rc2 Ke8
>> ± (0.88) Depth: 10/32 00:00:06 2039kN
>>32.Qxb7--
>> ² (0.59) Depth: 11/30 00:00:15 5636kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 dxe5 36.Qb2 h4 37.Re1
>> ² (0.41) Depth: 11/36 00:00:25 9478kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 dxe5 36.Qb2 Qd4 37.Qxd4 exd4
>>38.Nc4
>> ² (0.50) Depth: 12/36 00:01:04 25898kN
>>32.Qxb7--
>> = (0.22) Depth: 13/32 00:01:35 39408kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 Qxe2 36.Bxf6 Rxf6 37.Qc8+ Kg7
>>38.Qc7+ Kh6 39.Qc1 Qxf2+ 40.Kh1
>> = (-0.19) Depth: 13/41 00:02:10 54477kN
>>32.Qxb7 Ne3 33.R4xe3 Bxe3 34.Nxe3 Qd3 35.Bxe5 Qxe2 36.Bxf6 Rxf6 37.Qc8+ Kg7
>>38.Qc7+ Kh6 39.Qc1 Qxf2+ 40.Kh1
>> = (-0.19) Depth: 14/37 00:10:12 259851kN
>>
>>(Blass, Tel-Aviv 14.11.2003)
>
>
>
>The question is how long would you have to let your Athlon 1000 Ghz calculate in
>order to equal the same performance as the Quad 2.8 Ghz. Also in some position
>X3D Fritz calculated for more than 8 minutes which could be a lot of wasted time
>on a mere 1 Ghz :-)
>
>Jorge
I tried to see what happens after Rf6
Analyzing it with Fritz I get the following line
Rf6 32.Qc7 Bg5 33.Bc3 Ne7 34.Qxb7 Rxf2 35.Rxf2 Rxf2 36.Kxf2 Qxe4 Bd2 Bxd2 Nxd2
Qd4+ Ke2 Nxd5 when Fritz says it is better for black but maybe it underestimates
the white passed pawn.
Uri
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