Author: Dieter Buerssner
Date: 12:00:26 07/27/02
Go up one level in this thread
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
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