Author: Dieter Buerssner
Date: 10:48:02 10/23/04
Go up one level in this thread
On October 22, 2004 at 15:59:09, Dan Andersson wrote:
> The few engines I tried all found Kd4 relatively fast.
Do the give a significant better score for Kd4, than for Kd3 and Kd5?
> Here is the output from
>one with pretty good knowledge of rook endgames, only limited 5 stone TBs
>though. The interesting line is the last one where it after a long think
>deviates from the Shipov lines that Sune gave. It gives rise to the ugly and
>tricky kinds of rook endgames with one runner versus two. But even there black
>has a very active king so it looks hard to defend.
It is impossible to defend, or my engine has a serious bug. After g5, I got a
score of +10. This does not even leave the hope, for some fortress like
positions, that the engine cannot understand, or some other draws, that it won't
understand (like Pf7 vs. Q).
>17 26:34 1,72 Ke4d4 g4g5 Rb3xb2+ Kf2f3 Rb2xb6 g5g6 Rb6b7 Re8e4+ Kd4c3
>Kf3xf4 d6d5 Re4e1 Rb7g7 Kf4f5 d5d4 Re1c1+ Kc3b3 Rc1b1+ Kb3c2 Rb1b4 Kc2d3
Actually exactly the line Mihaly suggested. I also had this as the main line
after Kd4 g5 in my PGN.
I got:
282727508 8:53.0 0.90 18t 50...Kd5 51.Re2 Kc6 52.Rd2 d5 53.g5 Kc5 54.b7
Kd6 55.Re2 Kc6 56.b8=N+ Rxb8 57.Kf3 {HT} {80}
357161980 11:51.1 0.91 18t+ 50...Kd4 51.Re2 f3 52.b7 fxe2 53.Kxe2
636430626 19:39.5 0.92 18t 50...Kd4 51.Re2 f3 52.Rd2+ Ke4 53.Rxd6H Rxb2+H
54.Kg3H f2H 55.Re6+H Kd3H 56.Rf6H c3H 57.Rxf2H
c2H 58.Rf3+H Kd4H 59.Rf4+H Kc5H {HT} {-80}
638933508 19:56.6 0.92 18. 50...Kd4 51.Re2 f3 52.Rd2+ Ke4 53.Rxd6 Rxb2+
54.Kg3 f2 55.Re6+ Kd3 56.Rf6 c3 57.Rxf2 c2
58.Rf3+ Kd4 59.Rf4+ Kc5 {HT} {-80}
1377962185 45:03.2 1.31 19t 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+H 53.Kf3H Rb7H
54.g7H Rxg7H 55.Rf8H {HT}
1435865279 47:30.4 1.31 19. 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+ 53.Kf3 Rb7
54.g7 Rxg7 55.Rf8
3765022874 2:11:52 1.45 20t 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+ 53.Kf3 Rb7
54.Re4+ Kc3 55.Kxf4 d5 56.Re3+ Kd4 57.Re1 c3
58.Rd1+ Kc4 59.Ke5 c2 60.Rg1 d4 61.g7 Rb8
62.Kf4 d3 63.Rc1 {HT} {80}
3867668926 2:17:18 1.45 20. 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+ 53.Kf3 Rb7
54.Re4+ Kc3 55.Kxf4 d5 56.Re3+ Kd4 57.Re1 c3
58.Rd1+ Kc4 59.Ke5 c2 60.Rg1 d4 61.g7 Rb8
62.Kf4 d3 63.Rc1 {HT} {80}
1422145017 5:55:04 1.58 21t 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+ 53.Kf3 Rb7
54.Re4+ Kc3 55.Kxf4 d5 56.Re3+ Kd4 57.Re1 c3
58.Rd1+ Kc4 59.Ke5 c2 60.Rc1 Kd3 61.Kxd5 Rg7
62.Rg1 Rxg6 63.Rc1 {80}
1826885725 6:10:42 1.58 21. 50...Kd4 51.g5 Rxb6 52.g6 Rxb2+ 53.Kf3 Rb7
54.Re4+ Kc3 55.Kxf4 d5 56.Re3+ Kd4 57.Re1 c3
58.Rd1+ Kc4 59.Ke5 c2 60.Rc1 Kd3 61.Kxd5 Rg7
62.Rg1 Rxg6 63.Rc1 {80}
The score is not convincing here. Some moves after 50...Kd5, I got a score of
2.0, while I think the pos is draw.
Regards,
Dieter
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.