Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Testposition: easy for human, hard for computers!

Author: Dieter Buerssner

Date: 14:04:38 03/31/04

Go up one level in this thread


On March 31, 2004 at 09:13:59, Eduard Nemeth wrote:

>Composition Eduard Nemeth
>
>4nBRR/4P1PP/3pKn2/8/4P3/8/6k1/8 b - - 0 1
>
>Black wins.
>
>My german comment, you can find on my website
>
>http://www.beepworld.de/members37/computerschach/
>
>under "Schach-Augenblicke" Issue 02.

With Yace, you'll need some patience, but it will at least come up with the
correct move after a while. I guess "passed pawn pushing extensions" could help
here much. Also, there might be some null move issues, but I am not sure.
Anyway, after 40 minutes Yace switches to Nxe4 again with slightly positive
score, and after 2h+, to a winning score:

2090863226 34:59.2   0.00 20.  1...Kf3 2.e5 dxe5 3.Kxe5 Ke3 4.Kf5 Kf3 5.Kg5
                               Kg3 6.Kh6 Kf4 7.Kg6 Kg4 8.Kf7 Kg5 9.Ke6 Kf4
                               10.Kf7
2298213588 38:43.5   0.00 21t  1...Kf3 2.e5 dxe5 3.Kxe5 Ke3 4.Kf5 Kf3 5.Kg5
                               Kg3 6.Kh6 Kf4 7.Kg6 Kg4 8.Kf7 {HT}
2303918325 38:48.8   0.01 21t+ 1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Kf3 4.Kd3 d5 5.Kd4
                               Ke2 6.Kc5 Ke3 7.Kc6 d4 8.Kb6H {HT}
2778651751 46:19.1   0.01 21t  1...Nxe4 2.Kd5 N4f6+ 3.Kd4H Kf3H 4.Kd3H d5H
                               5.Kd4H Ke2H 6.Kc5H Ke3H 7.Kc6H d4H 8.Kb6H {HT}
3762902710 1:03:00   0.01 21.  1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Kf3 4.Kd3 d5 5.Kd4
                               Ke2 6.Kc5 Ke3 7.Kc6 d4 8.Kb6
 422272879 1:18:31   0.02 22t  1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Kf3 4.Kd3 d5 5.Kd4
                               Ke2 6.Kc5 Ke3 7.Kc6 d4 8.Kb6 Kf2 9.Ka6 Ne4
                               10.Ka5 d3 {-830}
2572707002 1:55:07   0.02 22.  1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Kf3 4.Kd3 d5 5.Kd4
                               Ke2 6.Kc5 Ke3 7.Kc6 d4 8.Kb6 Kf2 9.Ka6 Ne4
                               10.Ka5 d3 {-830}
3558501311 2:11:07   0.42 23++ 1...Nxe4 2.Kd5 Kf3 3.Kc6 Ke3 4.Kd5 N4f6+ 5.Kc6
                               d5 6.Kb5 d4 7.Kc6 d3 8.Kb7
3760797392 2:14:18   1.42 23++ 1...Nxe4 2.Kd5 Nc5 3.Kd4 Kf3 4.Kc4 Ke4 5.Kb4 d5
                               6.Kb5 d4 7.Kb6
3778117006 2:14:35 Mat258 23++ 1...Nxe4 2.Kd5 Nc5 3.Kd4 Kf3 4.Kc4 Ke4 5.Kb4 d5
                               6.Kb5 d4 7.Kc4 d3 8.Kc3 Ke3H 9.Kc4H d2H
                               10.Kxc5H d1=QH {-249}
3385627833 3:16:12  Mat21 23t  1...Nxe4 2.Kd5 Nc5 3.Kc4 Kf3 4.Kd4 Kf4 5.Kd5H
                               {HT} {-830}
 531301065 4:50:14  Mat21 23.  1...Nxe4 2.Kd5 Nc5 3.Kc4 Kf3 4.Kd4 Kf4 5.Kd5
                               {HT} {-830}
1709263330 6:07:56  Mat17 24t  1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Kf3 4.Kd3 d5 5.Kd4H
                               Ke2H 6.Kc5H Ke3H 7.Kb4H d4H 8.Kb3H d3H {HT}
                               {-830}

I guess, with more patience, Mat16 (as reported by Franz) would be found, too.

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.