Author: Slater Wold
Date: 15:24:14 07/27/02
Go up one level in this thread
On July 27, 2002 at 15:00:26, Dieter Buerssner wrote:
>On July 26, 2002 at 22:45:57, Slater Wold wrote:
>
>>On July 26, 2002 at 18:14:08, Dieter Buerssner wrote:
>>
>>>On July 26, 2002 at 16:55:27, Slater Wold wrote:
>>>
>>>>On July 26, 2002 at 14:53:33, Dieter Buerssner wrote:
>>>>
>>>>>On July 26, 2002 at 00:54:10, Slater Wold wrote:
>>>>>
>>>>>>8/pR4pk/1b2p3/2p3p1/N1p5/7P/PP1r2P1/6K1 b - - 0 31
>>>>>>
>>>>>>The only move to make here is Rxb2. The win is only about 10 moves away, and
>>>>>>while some programs I tested find Rxb2, none have an impressive score. And
>>>>>>that's *if* they find it.
>>>>>
>>>>>What would be an impressive score?
>>
>>According to several GMs, Rxb2 is a forced win.
>>
>>The win is a bit deeper than the first position. I would be impressed by a
>>*correct* PV and any score, but a little dismayed with a 0.50 score. Anything
>>+1.50 or so would impress me.
>
>Your comment about the impressive score was for the first (the easy) position,
>and so was my question. It seems, your answer is about the second position. But
>anyway, you say, "with a correct PV". Which would be a correct PV in the second
>position? Unfortunately, I made a stupid error in my post, and have shown the
>wrong line. Yace actually shows after about one minute the line, that Martin has
>commented. But Even when following the line, it cannot find anything decisive
>with a very long think (score stays around 1/2 pawn).
>
>For the first position, Yace actually needs longer than for the second position
>- as Ikarus did, too:
>
> 3620823 35.291 1.12 11t 31...Rd6 32. Kf1 Kg6 33. Ke2 e5 34. Nc3 g4 35.
> hxg4 Rd4 36. Na4 Rd6 {90}
> 3955498 38.488 1.13 11t+ 31...Kg6 32. Nxb6 Rxb2 33. Rxa7 Rb1+ 34. Kh2 c3
> 35. Nc4 c2 36. Ne5+ Kh6 37. a3 c1=Q 38. Ra5
> {741}
> 5847509 57.593 1.13 11t 31...Kg6 32. Kf1 e5 33. Rb8 Rd6 34. Rc8H Rd1+H
> 35. Ke2H Rg1H 36. Kf3H Ra1H 37. Nc3H {170}
> 9991399 1:37.2 1.13 11. 31...Kg6 32. Kf1 e5 33. Rb8 Rd6 34. Rc8 Rd1+
> 35. Ke2 Rg1 36. Kf3 Ra1 37. Nc3 {170}
> 12581628 2:02.4 1.13 12t 31...Kg6 32. Kf1 e5 33. Rb8 Rd6 34. Ke2 Kf7 35.
> Rc8 Ke6 36. Re8+ Kf5 37. Rc8 Rd5 {170}
> 16141741 2:34.6 1.14 12t+ 31...Rxb2 32. Nxb2 c3 33. Rxb6 c4 34. Rb4 a5
> 35. Nxc4 c2 36. Kf2 c1=Q 37. Ra4 Qc2+ 38. Kg1
> {241}
> 16634970 2:38.7 1.53 12++ 31...Rxb2 32. Nxb2 c3 33. Rxb6 c4 34. Rb4 a5
> 35. Nxc4 c2 36. Rb5 c1=Q+ 37. Kh2 Qxc4 38. Rxa5
> {501}
> 18834092 2:58.1 2.53 12++ 31...Rxb2 32. Nxb2 c3 33. Rxb6 c4 34. Rb4 a5
> 35. Nxc4 c2 36. Rb5 c1=Q+ 37. Kh2 Qxc4 38. Rxa5
> {501}
> 21306009 3:20.2 2.81 12t 31...Rxb2 32. Nxb2 c3 33. Rxb6 c4 34. Nxc4 c2
> 35. Rc6 c1=Q+ 36. Kh2 Qf4+ 37. Kg1 Qe4 38. Rc8
> Qb1+ 39. Kh2 Qxa2 40. Ne5 {321}
> 21691941 3:23.8 2.81 12. 31...Rxb2 32. Nxb2 c3 33. Rxb6 c4 34. Nxc4 c2
> 35. Rc6 c1=Q+ 36. Kh2 Qf4+ 37. Kg1 Qe4 38. Rc8
> Qb1+ 39. Kh2 Qxa2 40. Ne5 {321}
> 28528422 4:22.7 2.96 13t 31...Rxb2 32. Nxb2 c3 33. Rxb6 c4 34. Nxc4 c2
> 35. Rc6 c1=Q+ 36. Kh2 Qf4+ 37. Kg1 Qe4 38. Rc7
> Qb1+ 39. Kf2 Qxa2+H {HT} {321}
> 30064153 4:36.9 2.96 13. 31...Rxb2 32. Nxb2 c3 33. Rxb6 c4 34. Nxc4 c2
> 35. Rc6 c1=Q+ 36. Kh2 Qf4+ 37. Kg1 Qe4 38. Rc7
> Qb1+ 39. Kf2 Qxa2+ {HT} {321}
> 38691688 5:50.5 2.98 14t 31...Rxb2 32. Nxb2 c3 33. Rxb6 c4 34. Nxc4 c2
> 35. Rc6 c1=Q+ 36. Kh2 Qf4+ 37. Kh1 Qe4 38. Rc5
> Qe1+H {HT} {241}
> 43121283 6:30.9 2.98 14. 31...Rxb2 32. Nxb2 c3 33. Rxb6 c4 34. Nxc4 c2
> 35. Rc6 c1=Q+ 36. Kh2 Qf4+ 37. Kh1 Qe4 38. Rc5
> Qe1+ {HT} {241}
>
>For the second position:
>
> 3262901 31.548 -0.08 12t 29...c3 30. bxc3 Rxa2 31. Nxb6 axb6 32. f5 Ra3
> 33. f6 Kg6 34. fxg7 Kh7 35. c4 Rxg3 36. Kf2
> {HT} {0}
> 7621434 1:15.8 -0.07 12t+ 29...Rxb2 30. Nxb2 c3 31. Rxb6 c4 32. Rb4 a5
> 33. Nd3 cxd3 34. Rc4 c2 35. Ra4 c1=Q+ 36. Kf2
> {501}
> 8352119 1:22.1 0.35 12t 29...Rxb2 30. Nxb2 c3 31. Rxb6 c4 32. Nxc4 c2
> 33. Rc6 {HT} {-840}
> 8561630 1:24.0 0.35 12. 29...Rxb2 30. Nxb2 c3 31. Rxb6 c4 32. Nxc4 c2
> 33. Rc6 {HT} {-840}
> 10431029 1:39.7 0.39 13t 29...Rxb2 30. Nxb2 c3 31. Rxb6 c4 32. Nxc4 c2
> 33. Rc6 c1=Q+ 34. Kh2 Qd1 35. Rc5 Qc2 36. a3 a5
> 37. g4 {HT} {81}
> 12137590 1:57.5 0.39 13. 29...Rxb2 30. Nxb2 c3 31. Rxb6 c4 32. Nxc4 c2
> 33. Rc6 c1=Q+ 34. Kh2 Qd1 35. Rc5 Qc2 36. a3 a5
> 37. g4 {HT} {81}
> 16662129 2:42.5 0.42 14t 29...Rxb2 30. Nxb2 c3 31. Rxb6 c4 32. Nxc4 c2
> 33. Rc6 c1=Q+ 34. Kh2 Qd1 35. Rc5 Qc2 36. a3 a5
> 37. a4 g5 {81}
> 19940315 3:13.1 0.42 14. 29...Rxb2 30. Nxb2 c3 31. Rxb6 c4 32. Nxc4 c2
> 33. Rc6 c1=Q+ 34. Kh2 Qd1 35. Rc5 Qc2 36. a3 a5
> 37. a4 g5 {81}
>
>All on K6-2 475
>
>Regards,
>Dieter
On a dual AMD 1.73Ghz using Crafty 18.15, the score for the 2nd position is
actually -1.44. Which to me is impressive.
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