Test position: Szen's position (1840)

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Marc MP

Test position: Szen's position (1840)

Post by Marc MP »

[d]4k3/5ppp/8/8/8/8/PPP5/3K4 w - - 0 0

In a book Edmar Mednis calls this the Szen's position, dating back from 1840.

The theory says whoever is on move wins.

By filling the hash 10 plies into the main line (1.Ke2 Kd7 2. Kf3 Kc6 3.a4 h5 4.c4 f5 5.Kg3 Kb6)

[d]8/6p1/1k6/5p1p/P1P5/6K1/1P6/8 w - - 0 5

I was able to get a winning score for white and going backward to the start position, FireBird 1.2 now shows a +5.25 score.

Can your engine show a winning score without help?
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Eelco de Groot
Posts: 4673
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test position: Szen's position (1840)

Post by Eelco de Groot »

Marc MP wrote:[d]4k3/5ppp/8/8/8/8/PPP5/3K4 w - - 0 0

In a book Edmar Mednis calls this the Szen's position, dating back from 1840.

The theory says whoever is on move wins.

By filling the hash 10 plies into the main line (1.Ke2 Kd7 2. Kf3 Kc6 3.a4 h5 4.c4 f5 5.Kg3 Kb6)

[d]8/6p1/1k6/5p1p/P1P5/6K1/1P6/8 w - - 0 5

I was able to get a winning score for white and going backward to the start position, FireBird 1.2 now shows a +5.25 score.

Can your engine show a winning score without help?
I don't think it will be a hard position for one of the 8 threaded monsters :) Here is Rainbow Serpent:

[d]4k3/5ppp/8/8/8/8/PPP5/3K4 w - -

Engine: Rainbow Serpent 1.6.3s(dc) Build 216 (Athlon 2009 MHz, 256 MB)
by Tord Romstad, Marco Costalba, Joona Kiiski Modifications: Dann Corbit

1.00 0:00 +0.60 1.a4 (10) 0

2.00 0:00 +0.36 1.a4 Kd7 (2.929) 11

3.00 0:00 +0.44 1.a4 h5 2.a5 Kd7 3.b4 h4 4.Ke1 g5
5.a6 Kc6 (18.147) 58

4.00 0:00 +0.40 1.a4 h5 2.a5 Kd7 3.a6 Kc6 4.b4 h4
5.b5+ Kc7 6.Ke1 g5 7.c4 (25.080) 76

5.00 0:00 +0.32 1.a4 h5 2.Ke2 Kd7 3.a5 h4 4.b4 g5
5.a6 Kc6 6.c4 g4 7.a7 (193.491) 326

6.00 0:00 +0.28 1.a4 h5 2.Ke2 Kd7 3.c4 g5 4.b4 h4
5.a5 f5 6.Kf2 Kc6 7.a6 h3 8.b5+ Kb6
9.Kg1 (219.751) 343

7.00 0:00 +0.28 1.a4 h5 2.Ke2 Kd7 3.c4 g5 4.b4 Kc6
5.a5 g4 6.Kf2 h4 7.Kg2 f5 8.b5+ Kb7
9.c5 (257.845) 366

8.00 0:00 +0.32 1.a4 h5 2.Ke2 Kd7 3.b4 h4 4.Kf2 g5
5.c4 g4 6.a5 Kc8 7.b5 Kb7 8.a6+ Ka7
9.c5 f5 10.Kg2 h3+ 11.Kh2 f4 (383.547) 423

9.00 0:01 +0.20 1.a4 Kd7 2.b4 h5 3.Ke2 Kc6 4.c4 g5
5.a5 h4 6.b5+ Kb7 7.c5 g4 8.Kf2 f5
9.a6+ Ka7 10.Kg2 f4 11.Kf2 h3 (781.568) 515

10.01 0:01 +0.20 1.a4 h5 2.b4 h4 3.Ke2 Kd7 4.a5 g5
5.Kf2 Kc6 6.c4 f5 7.b5+ Kb7 8.c5 g4
9.Kg1 f4 10.Kg2 Kb8 11.Kf2 Kb7
12.c6+ Kc7 13.Kg2 h3+ 14.Kh2 (1.025.052) 546

11.01 0:02 +0.20 1.a4 h5 2.b4 h4 3.Ke2 Kd7 4.a5 g5
5.Kf2 Kc6 6.c4 f5 7.b5+ Kc5 8.Kf3 g4+
9.Kf4 h3 10.Kg3 f4+ 11.Kh2 f3 12.Kg3 h2
13.Kxh2 (1.346.495) 570

12.01 0:04 +0.20 1.a4 h5 2.b4 Kd7 3.Ke2 g5 4.c4 h4
5.Kf2 g4 6.b5 Kc7 7.a5 Kb7 8.c5 f5
9.c6+ Kc7 10.Kg2 h3+ 11.Kg3 f4+
12.Kh2 f3 13.Kg3 Kb8 14.b6 (2.505.886) 614

12.02 0:05 +0.28 1.b4 h5 2.a4 Kd7 3.Ke2 g5 4.c4 h4
5.Kf2 g4 6.a5 Kc7 7.b5 Kb7 8.c5 h3
9.a6+ Ka7 10.c6 Kb6 11.Kg3 f5 12.Kh2 f4
13.Kh1 g3 14.a7 (3.205.429) 631

13.01 0:06 +0.20 1.b4 h5 2.a4 Kd7 3.Ke2 g5 4.c4 h4
5.Kf2 g4 6.a5 Kc7 7.b5 Kb8 8.a6 Ka7
9.Kg1 h3 10.c5 f5 11.c6 Kb6 12.a7 Kxa7
13.Kh2 f4 (4.421.388) 655

14.01 0:10 -0.04-- 1.b4 h5 2.Ke2 Kd7 3.a4 g5 4.c4 h4
5.Kf2 Kc7 6.a5 h3 7.a6 Kb8 8.b5 Ka7
9.c5 g4 10.Kg3 f5 11.Kf2 f4 12.Kg1 f3
13.c6 Kb6 14.a7 (7.076.492) 690

14.02 0:12 +0.40 1.Ke2 Kd7 2.a4 g5 3.Kf2 h5 4.a5 h4
5.c4 Kc7 6.c5 Kb8 7.Kf3 f5 8.b4 g4+
9.Kg2 g3 10.b5 f4 11.a6 Ka7 12.c6 Kb6
13.c7 Kxc7 14.a7 (8.670.338) 698

15.01 0:29 +0.16 1.Ke2 Kd7 2.a4 Kc6 3.c4 Kb7 4.a5 Ka6
5.b4 g5 6.Kf2 f5 7.Kf3 f4 8.Kg4 h6
9.Kf3 h5 10.c5 Ka7 11.Kf2 (21.775.169) 735

16.01 1:07 +0.39 1.Ke2 Kd7 2.a4 Kc6 3.c4 Kb7 4.c5 Kc6
5.b4 g5 6.Ke3 g4 7.Kd4 h5 8.b5+ Kc7
9.a5 Kb8 10.a6 Ka7 11.c6 Kb6 12.Ke3 h4
13.Kf2 h3 14.a7 (52.754.355) 776

17.01 2:31 +1.11++ 1.Ke2 Kd7 2.a4 Kc6 3.c4 Kb7 4.c5 Kc6
5.b4 g5 6.Ke3 g4 7.Kf2 f5 8.a5 Kb5
9.Kg3 h5 10.Kg2 f4 11.Kf2 f3 12.Kg3 Kc6
13.a6 Kc7 14.b5 (123.504.779) 814

18.01 8:46 +3.23 1.Ke2 Kd7 2.a4 Kc6 3.Kf2 Kb6 4.b4 g5
5.c4 Kb7 6.Kg2 h5 7.c5 h4 8.Kh3 Ka8
9.a5 Kb7 10.b5 Kb8 11.b6 Kb7 12.Kg4 f6
13.Kh3 f5 14.Kh2 (457.364.172) 869

18.03 9:54 +4.04 1.Ke1 Kd7 2.a4 Kc7 3.Kf2 Kd7 4.c4 Kc6
5.a5 Kb7 6.c5 Kb8 7.Kg3 Kb7 8.b4 f6
9.Kg4 Kb8 10.b5 h6 11.Kg3 f5 12.c6 Kc7
13.a6 Kb6 14.Kf4 (516.620.698) 869

19.01 10:28 +4.04 1.Ke1 Kd7 2.a4 Kc7 3.Kf2 Kd7 4.c4 Kc6
5.a5 Kb7 6.Kg3 Ka6 7.b4 Kb7 8.Kf3 g6
9.b5 h5 10.c5 Kb8 11.Kg3 f5 12.Kg2 h4
13.Kf2 Kc7 14.a6 (545.972.560) 868

20.01 26:06 +6.24++ 1.Ke1 Kd7 2.a4 Kc7 3.Kf2 Kd7 4.b4 Kc6
5.a5 Kb7 6.c4 Ka6 7.c5 Kb5 8.Kf3 f5
9.Kg3 h6 10.Kf4 g6 11.Kf3 h5 12.Kg3 Ka6
13.c6 (1.333.716.888) 851

21.01 49:27 +6.20 1.Ke1 Kd7 2.a4 h5 3.Kf1 g5 4.Kg2 Kc6
5.a5 h4 6.Kh3 f5 7.c4 f4 8.Kg4 Kc7
9.c5 f3 10.Kxf3 h3 11.b4 h2 12.Kg2 h1R
13.Kxh1 g4 14.a6 (2.527.630.989) 851

22.01 90:26 +5.84 1.Ke1 Kd7 2.a4 h5 3.Kf2 Kc6 4.Kg2 g5
5.a5 Kb7 6.c4 h4 7.Kh3 Ka6 8.b4 f5
9.c5 Kb5 10.Kh2 g4 11.Kg2 Kc6 12.a6 h3+
13.Kg3 Kc7 14.b5 (4.512.065.117) 831

best move: Kd1-e1 time: 180:29.094 min n/s: 775.400 nodes: 8.396.880.059

It seems like Rainbow Serpent really prefers the move Ke1, at 22 ply it seemed like a long time that it would switch again to 1. Ke2 and was thinking about that move for ca. 90 minutes but then it skipped it and I stopped the analysis.

Eelco
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Test position: Szen's position (1840)

Post by zullil »

Eelco de Groot wrote:
Marc MP wrote:[d]4k3/5ppp/8/8/8/8/PPP5/3K4 w - - 0 0

In a book Edmar Mednis calls this the Szen's position, dating back from 1840.

The theory says whoever is on move wins.

Can your engine show a winning score without help?
I don't think it will be a hard position for one of the 8 threaded monsters
Eelco
Stockfish-1.6.3 (8 threaded monster) sees a win for White:

Code: Select all

Searching: 4k3/5ppp/8/8/8/8/PPP5/3K4 w - -
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0
 2     +0.20   00:02       29 a4 Kd7 
 3     +0.40   00:02      315 a4 g5 a5 Kd7 
 4     +0.81   00:02     1008 a4 g5 a5 Kd7 Ke2 
 5     +0.61   00:02     2311 a4 Kd7 Ke2 h5 a5 Kc6 
 6     +0.73   00:02     4055 a4 Kd7 Ke2 h5 a5 Kc6 Kd3 
 7     +0.48   00:02     7268 a4 Kd7 Ke2 h5 a5 Kc6 b4 g5 c4 f5 b5+ Kc5 
 8     +0.73   00:02    19357 a4 Kd7 Ke2 h5 a5 Kc6 b4 g5 c4 f5 b5+ Kc5 Ke3 f4+ 
                              Kf3 
 9  <  +0.00   00:02    40723 a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 
10     +0.04   00:02   251605 a4 Kd7 Ke2 h5 a5 g5 a6 Kc7 b4 f5 c4 h4 c5 h3 Kf2 
                              g4 b5 f4 
11     +0.00   00:02   346261 a4 Kd7 Ke2 h5 a5 g5 Kf3 f5 b4 h4 b5 g4+ Kg2 Kc7 
                              c4 h3+ Kh2 f4 c5 
12     +0.00   00:02   427177 a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 Kc7 b5 f5 c4 h3 Kg3 
                              g4 Kh2 f4 c5 f3 
13     -0.04   00:02   568526 a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 c4 h3 Kg3 
                              f4+ Kh2 Kd6 a6 Kc7 
14     -0.04   00:02   838832 a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 c4 Kc7 Kg2 
                              f4 c5 Kb7 a6+ Ka7 c6 Kb6 
15     -0.08   00:03    1519k a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 a6 Kc7 c3 
                              Kb6 c4 f4 c5+ Ka7 Kg1 h3 Kh2 f3 
16  >  +0.12   00:03    2116k a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 a6 Kc7 c4 
                              h3 c5 f4 Kf1 g3 b6+ Kc6 a7 Kb7 c6+ 
17     +0.20   00:03    3423k a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 a6 Kc7 c4 
                              Kb6 Kg2 f4 c5+ Ka7 Kg1 h3 Kh2 f3 Kg3 h2 Kxh2 
18     +0.00   00:04   10081k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
19     +0.00   00:04   12921k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
20     +0.00   00:04   16367k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
21     +0.00   00:05   22715k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
22     +0.00   00:07   34072k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
23     +0.00   00:09   50607k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
24     +0.00   00:12   77194k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
25     +0.00   00:27  210024k a4 h5 a5 Kd7 Ke2 f5 a6 Kc7 b4 Kb6 b5 Ka7 Kf3 h4 
                              Kf2 f4 Kg2 Kb6 Kg1 Ka7 Kg2 
26     +0.00   00:47  352562k a4 h5 a5 Kd7 Ke2 f5 a6 Kc7 b4 Kb6 b5 Ka7 Kf3 h4 
                              Kf2 f4 Kg2 Kb6 Kg1 Ka7 Kg2 
26  >  +0.20   00:57  433535k Ke2 h5 Kf3 Kd7 a4 g5 a5 Kc6 c4 h4 Kg4 Kc7 c5 f5+ 
                              Kh3 f4 Kg4 Kc6 a6 h3 Kxh3 Kc7 b4 f3 Kg3 
27  >  +1.01   01:07  531970k Ke2 h5 Kf3 Kd7 a4 g5 a5 Kc6 c4 h4 Kg4 Kc7 c5 Kb8 
                              Kh3 Kb7 b4 Kc7 a6 f5 b5 f4 b6+ Kc6 a7 Kb7 c6+ Ka8 
                              Kg2 g4 c7 f3+ Kf2 
28  >  +4.24   01:22  640282k Ke2 h5 Kf3 Kd7 a4 g5 a5 Kc6 c4 h4 Kg4 Kc7 c5 Kb8 
                              Kh3 Kb7 b3 f5 b4 f4 Kg2 g4 Kg1 f3 Kf2 Ka7 c6 Kb8 
                              a6 Kc7 a7 g3+ Kxf3 
29    +10.71   02:36    1214M Ke2 h5 Kf3 Kd7 a4 Kc6 a5 h4 Kg4 Kb5 b4 g5 Kh3 f5 
                              c4+ Ka6 c5 Kb5 Kh2 g4 Kg2 g3 Kh3 g2 Kxg2 f4 Kf2 
                              h3 Kf3 Kxb4 a6 Kxc5 a7 h2 Kg2 Kd5 a8=Q+ Ke5 Kxh2 
                              Kf5 Qf3 Ke5 Qh5+ Kf6 Qg4 
30    +13.74   04:16    1961M Ke2 h5 Kf3 Kd7 a4 Kc6 a5 h4 Kg4 Kb5 b4 g5 Kh3 f5 
                              c4+ Ka6 c5 Kb5 Kh2 g4 Kg2 g3 Kh3 g2 Kxg2 f4 Kf2 
                              h3 Kf3 Kc4 a6 h2 Kg2 f3+ Kxh2 Kd3 a7 f2 a8=Q 
                              f1=N+ Kh3 Nd2 Qd5+ Kc3 b5 Nc4 Kg3 
31  > +23.03   05:31    2677M Ke2 f5 Kf2 g5 b4 f4 Kf3 h6 c4 Kf7 Kf2 g4 a4 Ke6 
                              a5 f3 a6 Ke5 a7 Kf4 b5 g3+ Kg1 f2+ Kf1 Ke5 b6 Ke6 
                              a8=Q g2+ Qxg2 
32  > +67.11   11:00    5871M Ke2 
Nodes: 10016382319
Nodes/second: 9137759
Best move: Ke2
Ponder move: (none)
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Marc MP

Re: Test position: Szen's position (1840)

Post by Marc MP »

zullil wrote:
Eelco de Groot wrote:
Marc MP wrote:[d]4k3/5ppp/8/8/8/8/PPP5/3K4 w - - 0 0

In a book Edmar Mednis calls this the Szen's position, dating back from 1840.

The theory says whoever is on move wins.

Can your engine show a winning score without help?
I don't think it will be a hard position for one of the 8 threaded monsters
Eelco
Stockfish-1.6.3 (8 threaded monster) sees a win for White:

Code: Select all

Searching: 4k3/5ppp/8/8/8/8/PPP5/3K4 w - -
infinite: 1 ponder: 0 time: 0 increment: 0 moves to go: 0
 2     +0.20   00:02       29 a4 Kd7 
 3     +0.40   00:02      315 a4 g5 a5 Kd7 
 4     +0.81   00:02     1008 a4 g5 a5 Kd7 Ke2 
 5     +0.61   00:02     2311 a4 Kd7 Ke2 h5 a5 Kc6 
 6     +0.73   00:02     4055 a4 Kd7 Ke2 h5 a5 Kc6 Kd3 
 7     +0.48   00:02     7268 a4 Kd7 Ke2 h5 a5 Kc6 b4 g5 c4 f5 b5+ Kc5 
 8     +0.73   00:02    19357 a4 Kd7 Ke2 h5 a5 Kc6 b4 g5 c4 f5 b5+ Kc5 Ke3 f4+ 
                              Kf3 
 9  <  +0.00   00:02    40723 a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 
10     +0.04   00:02   251605 a4 Kd7 Ke2 h5 a5 g5 a6 Kc7 b4 f5 c4 h4 c5 h3 Kf2 
                              g4 b5 f4 
11     +0.00   00:02   346261 a4 Kd7 Ke2 h5 a5 g5 Kf3 f5 b4 h4 b5 g4+ Kg2 Kc7 
                              c4 h3+ Kh2 f4 c5 
12     +0.00   00:02   427177 a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 Kc7 b5 f5 c4 h3 Kg3 
                              g4 Kh2 f4 c5 f3 
13     -0.04   00:02   568526 a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 c4 h3 Kg3 
                              f4+ Kh2 Kd6 a6 Kc7 
14     -0.04   00:02   838832 a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 c4 Kc7 Kg2 
                              f4 c5 Kb7 a6+ Ka7 c6 Kb6 
15     -0.08   00:03    1519k a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 a6 Kc7 c3 
                              Kb6 c4 f4 c5+ Ka7 Kg1 h3 Kh2 f3 
16  >  +0.12   00:03    2116k a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 a6 Kc7 c4 
                              h3 c5 f4 Kf1 g3 b6+ Kc6 a7 Kb7 c6+ 
17     +0.20   00:03    3423k a4 Kd7 Ke2 h5 a5 g5 Kf2 h4 b4 f5 b5 g4 a6 Kc7 c4 
                              Kb6 Kg2 f4 c5+ Ka7 Kg1 h3 Kh2 f3 Kg3 h2 Kxh2 
18     +0.00   00:04   10081k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
19     +0.00   00:04   12921k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
20     +0.00   00:04   16367k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
21     +0.00   00:05   22715k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
22     +0.00   00:07   34072k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
23     +0.00   00:09   50607k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
24     +0.00   00:12   77194k a4 Kd7 Ke2 h5 a5 Kc6 b4 h4 a6 Kb6 b5 g5 Kf2 g4 
                              Kg2 Ka7 Kg1 Kb6 Kh2 Ka7 Kg1 
25     +0.00   00:27  210024k a4 h5 a5 Kd7 Ke2 f5 a6 Kc7 b4 Kb6 b5 Ka7 Kf3 h4 
                              Kf2 f4 Kg2 Kb6 Kg1 Ka7 Kg2 
26     +0.00   00:47  352562k a4 h5 a5 Kd7 Ke2 f5 a6 Kc7 b4 Kb6 b5 Ka7 Kf3 h4 
                              Kf2 f4 Kg2 Kb6 Kg1 Ka7 Kg2 
26  >  +0.20   00:57  433535k Ke2 h5 Kf3 Kd7 a4 g5 a5 Kc6 c4 h4 Kg4 Kc7 c5 f5+ 
                              Kh3 f4 Kg4 Kc6 a6 h3 Kxh3 Kc7 b4 f3 Kg3 
27  >  +1.01   01:07  531970k Ke2 h5 Kf3 Kd7 a4 g5 a5 Kc6 c4 h4 Kg4 Kc7 c5 Kb8 
                              Kh3 Kb7 b4 Kc7 a6 f5 b5 f4 b6+ Kc6 a7 Kb7 c6+ Ka8 
                              Kg2 g4 c7 f3+ Kf2 
28  >  +4.24   01:22  640282k Ke2 h5 Kf3 Kd7 a4 g5 a5 Kc6 c4 h4 Kg4 Kc7 c5 Kb8 
                              Kh3 Kb7 b3 f5 b4 f4 Kg2 g4 Kg1 f3 Kf2 Ka7 c6 Kb8 
                              a6 Kc7 a7 g3+ Kxf3 
29    +10.71   02:36    1214M Ke2 h5 Kf3 Kd7 a4 Kc6 a5 h4 Kg4 Kb5 b4 g5 Kh3 f5 
                              c4+ Ka6 c5 Kb5 Kh2 g4 Kg2 g3 Kh3 g2 Kxg2 f4 Kf2 
                              h3 Kf3 Kxb4 a6 Kxc5 a7 h2 Kg2 Kd5 a8=Q+ Ke5 Kxh2 
                              Kf5 Qf3 Ke5 Qh5+ Kf6 Qg4 
30    +13.74   04:16    1961M Ke2 h5 Kf3 Kd7 a4 Kc6 a5 h4 Kg4 Kb5 b4 g5 Kh3 f5 
                              c4+ Ka6 c5 Kb5 Kh2 g4 Kg2 g3 Kh3 g2 Kxg2 f4 Kf2 
                              h3 Kf3 Kc4 a6 h2 Kg2 f3+ Kxh2 Kd3 a7 f2 a8=Q 
                              f1=N+ Kh3 Nd2 Qd5+ Kc3 b5 Nc4 Kg3 
31  > +23.03   05:31    2677M Ke2 f5 Kf2 g5 b4 f4 Kf3 h6 c4 Kf7 Kf2 g4 a4 Ke6 
                              a5 f3 a6 Ke5 a7 Kf4 b5 g3+ Kg1 f2+ Kf1 Ke5 b6 Ke6 
                              a8=Q g2+ Qxg2 
32  > +67.11   11:00    5871M Ke2 
Nodes: 10016382319
Nodes/second: 9137759
Best move: Ke2
Ponder move: (none)
StockFish seems particularly strong in endgames even if it doesn't have EGTB or EGBB (unless they are built-in).

Here is my try with Toga 1.4.1SE-JA with 5 men bitbases loaded into ram:

Code: Select all

FEN: 4k3/5ppp/8/8/8/8/PPP5/3K4 w - - 0 1 

Toga-141se-32-ja:
  1/1	00:00	           2	0	-0,22	Kd1c1
  1/1	00:00	           3	0	-0,10	Kd1e1
  1/1	00:00	           4	0	+0,14	Kd1d2
  2/3	00:00	         141	0	+0,10	Kd1d2 Ke8d7
  2/11	00:00	         625	0	+0,39	a2a4 Ke8d7 a4a5 Kd7d6
  3/11	00:00	       1.123	0	+0,64	a2a4 Ke8d7 a4a5 Kd7c6 a5a6 Kc6b6
  4/15	00:00	       2.990	0	+0,46	a2a4 Ke8d7 a4a5 Kd7c6 Kd1d2 Kc6b5
  5/31	00:00	      31.629	0	+0,55	a2a4 Ke8d7 a4a5 Kd7c6 c2c4 h7h5 b2b4 h5h4 b4b5+ Kc6c7 b5b6+ Kc7b7 Kd1e2
  6/31	00:00	     125.722	0	+0,10	a2a4 Ke8d7 a4a5 Kd7c6 Kd1e2 h7h5 Ke2f3 h5h4 Kf3g4 Kc6b5
  7/33	00:00	     172.507	0	+0,29	a2a4 Ke8d7 a4a5 Kd7c6 Kd1e2 h7h5 Ke2f3 h5h4 b2b4 f7f5 a5a6 Kc6b6 b4b5 g7g5 c2c4 g5g4+ Kf3e2 h4h3 c4c5+ Kb6a7
  8/35	00:01	     207.019	0	+0,33	a2a4 Ke8d7 a4a5 Kd7c6 Kd1e2 h7h5 Ke2f3 h5h4 b2b4 f7f5 a5a6 Kc6b6 b4b5 g7g5 c2c4 g5g4+ Kf3e2 h4h3 c4c5+ Kb6a7 Ke2f2
  9/46	00:01	     477.672	0	+0,19	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f3 h5h4 Kf3g4 g7g5 b2b4 Kc7c6 Kg4h3 f7f5 c2c4 f5f4 Kh3g4 Kc6d6 c4c5+ Kd6d5
 10/46	00:01	     770.163	760.000	+0,10	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 Kf2g2 Kc7b7 c2c4 Kb7a6 Kg2h3 Ka6xa5 Kh3xh4
 11/47	00:02	   1.130.568	764.114	+0,23	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 b2b4 g7g5 c2c4 g5g4 c4c5 Kc7b7 Kf2g2 h4h3+ Kg2h2 f7f6 b4b5 f6f5 a5a6+ Kb7a7 Kh2g3 f5f4+ Kg3h2 Ka7b8
 12/47	00:02	   1.370.944	760.175	+0,23	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 b2b4 g5g4 b4b5 h4h3 Kf2g3 Kb7b8 a5a6 Kb8a7 Kg3f2 f7f5 Kf2g3 f5f4+ Kg3h2 Ka7b8
 13/54	00:05	   3.900.574	792.500	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 b2b4 g5g4 b4b5 h4h3 Kf2g3 Kb7b8 Kg3f2 Kb8b7
 14/54	00:06	   4.443.309	787.289	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 15/54	00:07	   5.448.268	786.667	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 16/54	00:10	   7.394.132	783.333	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 17/54	00:12	   9.265.496	787.273	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 18/54	00:16	  12.641.169	794.667	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 19/84	01:41	  83.516.575	827.300	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 20/84	01:51	  91.301.426	827.091	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 21/98	03:41	 181.563.498	824.122	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 22/98	04:18	 213.828.743	829.520	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 23/98	05:51	 290.461.700	829.134	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 24/98	09:34	 478.038.006	833.300	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 25/98	16:04	 793.779.511	823.695	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 26/98	29:13	1.493.212.342	851.817	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 27/98	57:46	3.003.224 574	866.616	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 28/98	1:41:02	5.319.828 168	877.552	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
 29/98	4:17:44	13.366.303 543	864.363	 0,00	a2a4 Ke8d7 a4a5 h7h5 Kd1e2 Kd7c7 Ke2f2 h5h4 c2c4 g7g5 c4c5 Kc7b7 Kf2g2 g5g4 Kg2h2 h4h3 Kh2g3 Kb7b8 Kg3h2 Kb8b7
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yanquis1972
Posts: 1766
Joined: Wed Jun 03, 2009 12:14 am

Re: Test position: Szen's position (1840)

Post by yanquis1972 »

have any engines other than stockfish solved this position unassisted?
Top
Marc MP

Re: Test position: Szen's position (1840)

Post by Marc MP »

yanquis1972 wrote:have any engines other than stockfish solved this position unassisted?
I've a 6 years old PIV 3.2GzH here... here is YACE 99.87 output with partial 5 men TBs (but no 3-4 men bitbases that YACE is able to generate itself from the EGTB):

Code: Select all

YACE 99.87 (unassisted)

<snip>

00:16:17.0	0,01	17	1136576545	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 

00:16:33.0	0,01	17	1152442599	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 

00:19:26.2	0,41	18	1346162012	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 Ka6 c6 Ka7 b5 Kb8 b6 Ka8 

00:27:01.0	1,12	18	1857747185	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 Ka6 c6 Ka7 b5 h2 

00:27:51.2	1,12	18	1915071523	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 Ka6 c6 Ka7 b5 h2 

00:31:38.7	1,52	19	2173893697	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 f2 Kxf2 Kxb4 c6 g3+ 

00:43:30.8	2,27	19	3031762984	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 h2 Kxh2 f2 Kg2 g3 

00:44:28.7	2,27	19	3103162450	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 h2 Kxh2 f2 Kg2 g3 

01:23:54.6	2,30	20	1691347042	Ke2 Kd7 a4 Kc7 c4 h5 Kf3 Kb7 c5 Kc6 b4 g5 a5 Kb5 Kg3 h4+ Kh3 f5 Kh2 

01:25:18.4	2,30	20	1791574459	Ke2 Kd7 a4 Kc7 c4 h5 Kf3 Kb7 c5 Kc6 b4 g5 a5 Kb5 Kg3 h4+ Kh3 f5 Kh2
That was only after 1h30 hour. I tried Fruit 05/11/03 for longer with the same EGTB... the score shown was... 0.00.
Top
Marc MP

Re: Test position: Szen's position (1840)

Post by Marc MP »

Marc MP wrote:
yanquis1972 wrote:have any engines other than stockfish solved this position unassisted?
I've a 6 years old PIV 3.2GzH here... here is YACE 99.87 output with partial 5 men TBs (but no 3-4 men bitbases that YACE is able to generate itself from the EGTB):

Code: Select all

YACE 99.87 (unassisted)

<snip>

00:16:17.0	0,01	17	1136576545	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 

00:16:33.0	0,01	17	1152442599	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 

00:19:26.2	0,41	18	1346162012	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 Ka6 c6 Ka7 b5 Kb8 b6 Ka8 

00:27:01.0	1,12	18	1857747185	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 Ka6 c6 Ka7 b5 h2 

00:27:51.2	1,12	18	1915071523	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 Ka6 c6 Ka7 b5 h2 

00:31:38.7	1,52	19	2173893697	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 f2 Kxf2 Kxb4 c6 g3+ 

00:43:30.8	2,27	19	3031762984	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 h2 Kxh2 f2 Kg2 g3 

00:44:28.7	2,27	19	3103162450	Ke2 Kd7 a4 Kc7 b4 h5 Kf3 Kb7 a5 Ka6 Kg3 g5 c4 h4+ Kh3 f5 c5 Kb5 Kh2 f4 Kg2 g4 Kg1 h3 Kh2 f3 Kg3 h2 Kxh2 f2 Kg2 g3 

01:23:54.6	2,30	20	1691347042	Ke2 Kd7 a4 Kc7 c4 h5 Kf3 Kb7 c5 Kc6 b4 g5 a5 Kb5 Kg3 h4+ Kh3 f5 Kh2 

01:25:18.4	2,30	20	1791574459	Ke2 Kd7 a4 Kc7 c4 h5 Kf3 Kb7 c5 Kc6 b4 g5 a5 Kb5 Kg3 h4+ Kh3 f5 Kh2
That was only after 1h30 hour. I tried Fruit 05/11/03 for longer with the same EGTB... the score shown was... 0.00.
Same hardware, but full5 men tbs and Yace bitbases:


Code: Select all

 21	+3.59	3842.5M	53:27.64	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 g3+ 14.Kxh3 Kc6 15.a6 Kc7 16.b5 f3 17.a7 Kd7 18.a8=Q f2 19.c6+ Ke6 20.Kg2 f1=Q+H

 20	+3.19	3296.6M	45:39.75	.  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 f2 16.Kg2 g3 17.Kf1 Kc6 {HT} {80}

 20	+3.19	3251.0M	45:02.64	t  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 f2 16.Kg2 g3 17.Kf1H Kc6H {HT} {80}
 20	+3.05	2697.4M	37:21.34	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 g3+ 14.Kxh3 Ka6 15.c6 Ka7 16.b5 Kb8 17.a6 f3 18.a7+ Kc7 19.a8=Q g2 20.Qf8 g1=Q 2

 19	+2.65	2379.0M	32:52.72	.  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 Kxb4 {HT} {0}

 19	+2.65	2358.2M	32:35.79	t  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 Kxb4H {HT} {0}

 19	+2.52	2052.6M	28:29.07	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 f2 16.Kg2 g3 17.Kf1 g2+ 18.Kxg2 Kc4H 19.a6H Kb3H 20.a7H Ka3

 19	+1.52	1810.0M	25:05.54	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 Kc6 16.a6 Kd7 17.b5 Ke6 18.a7 Kf5 19.a8=Q Kf4H {HT}

 18	+1.12	1572.2M	21:41.11	.  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 Ka6 15.c6 Ka7 16.b5 h2 17.Kxh2 Kb8 18.a6 Kc7 19.a7 g3+ 20.Kxg3 Kd6 21.
 18	+1.12	1557.9M	21:28.76	t  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 Ka6 15.c6 Ka7 16.b5H h2H 17.Kxh2H Kb8H 18.a6H Kc7H 19.a7H g3+H 20.Kxg3

 18	+0.40	1372.3M	18:52.38	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 h2 13.Kxh2 Ka6 14.c6 Ka7 15.b5 Ka8 16.b6 f4 17.Kg2 g3 18.c7 Kb7H 19.c8=Q+H Kxc8H 20.a6H Kb8

 18	+0.01	1200.9M	16:29.34	t+ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5H h4H 6.Kh3H Kb7H 7.c4H Ka6H 8.b4H f5H 9.c5H Kb5H 10.Kh2H g4H 11.Kg2H h3+H {HT} {0}

 18	0.00	900.5M	12:14.42	t  1.a4 h5 2.a5 Kd8 3.c4 h4 4.Ke2 Kc7 5.c5 Kb7 6.Kf3 f5 7.Kf2 f4 8.Kg2 Kb8 9.Kg1 Kb7 10.Kg2 {0}
Top
Marc MP

Re: Test position: Szen's position (1840)

Post by Marc MP »

Marc MP wrote:
Marc MP wrote:
yanquis1972 wrote:have any engines other than stockfish solved this position unassisted?
Yace 99.87 with 5 men tbs abd bitbases:


Code: Select all

 22	+5.99	1831.1M	145:20.11	u. 1.Ke2 h5 2.Kf2 Kd7 3.Kg2 f5 4.c4 Kc6 5.a4 Kb6 6.b4 f4 7.c5+ Kc6 8.a5 Kb5 9.Kf3 g5 10.Kf2 g4 11.Kg2 Ka4 12.c6 h4 13.c7 f3+ 14.Kh2 g3+ 15.Kg1 f2+ 16.Kf1 h3 17.c8=Q g2+ 18.Kxf2 g1=R 19.Qxh3 Ra1

 22	+5.99	281.1M	123:55.99	++ 1.Ke2 h5 2.Kf2 Kd7 3.Kg2 f5 4.c4 Kc6 5.a4 Kb6 6.b4 f4 7.c5+ Kc6 8.a5 Kb5 9.Kf3 g5 10.Kf2 g4 11.Kg2 Ka4 12.c6 h4 13.c7 f3+ 14.Kh2 g3+ 15.Kg1 f2+ 16.Kf1 h3 17.c8=Q g2+ 18.Kxf2 g1=R 19.Qxh3 Ra1

 22	+4.99	3133.8M	103:24.82	++ 1.Ke2 h5 2.Kf2 Kd7 3.Kg2 f5 4.c4 Kc6 5.a4 Kb6 6.b4 f4 7.c5+ Kc6 8.a5 Kb5 9.Kf3 g5 10.Kf2 g4 11.Kg2 Ka4 12.c6 h4 13.c7 f3+ 14.Kh2 g3+ 15.Kg1 g2 16.c8=Q f2+ 17.Kxf2 g1=R
 
21	+4.59	1398.9M	78:26.89	.  1.Ke2 h5 2.Kf2 Kd7 3.Kg2 f5 4.c4 Kc6 5.a4 Kb6 6.b4 f4 7.c5+ Kc6 8.a5 Kb5 9.Kf3 g5 10.a6 Kxa6 11.b5+ Kxb5 {HT} {-160}

 21	+4.59	1323.6M	77:25.69	t  1.Ke2 h5 2.Kf2 Kd7H 3.Kg2H f5H 4.c4H Kc6H 5.a4H Kb6H 6.b4H f4H 7.c5+H Kc6H 8.a5H Kb5H 9.Kf3H g5H 10.a6H Kxa6H 11.b5+H Kxb5H {HT} {-160

 21	+4.59	4287.4M	59:32.93	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 g3+ 14.Kxh3 Kc4 15.a6 f3 16.a7 f2 17.Kg2 f1=R 18.a8=Q Rb1

 21	+3.59	3842.5M	53:27.64	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 g3+ 14.Kxh3 Kc6 15.a6 Kc7 16.b5 f3 17.a7 Kd7 18.a8=Q f2 19.c6+ Ke6 20.Kg2 f1=Q+H

 20	+3.19	3296.6M	45:39.75	.  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 f2 16.Kg2 g3 17.Kf1 Kc6 {HT} {80}

 20	+3.19	3251.0M	45:02.64	t  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 f2 16.Kg2 g3 17.Kf1H Kc6H {HT} {80}
 20	+3.05	2697.4M	37:21.34	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 g3+ 14.Kxh3 Ka6 15.c6 Ka7 16.b5 Kb8 17.a6 f3 18.a7+ Kc7 19.a8=Q g2 20.Qf8 g1=Q 2

 19	+2.65	2379.0M	32:52.72	.  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 Kxb4 {HT} {0}

 19	+2.65	2358.2M	32:35.79	t  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 Kxb4H {HT} {0}

 19	+2.52	2052.6M	28:29.07	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 f2 16.Kg2 g3 17.Kf1 g2+ 18.Kxg2 Kc4H 19.a6H Kb3H 20.a7H Ka3

 19	+1.52	1810.0M	25:05.54	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 h2 15.Kxh2 Kc6 16.a6 Kd7 17.b5 Ke6 18.a7 Kf5 19.a8=Q Kf4H {HT}

 18	+1.12	1572.2M	21:41.11	.  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 Ka6 15.c6 Ka7 16.b5 h2 17.Kxh2 Kb8 18.a6 Kc7 19.a7 g3+ 20.Kxg3 Kd6 21.
 18	+1.12	1557.9M	21:28.76	t  1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 f4+ 13.Kh2 f3 14.Kg3 Ka6 15.c6 Ka7 16.b5H h2H 17.Kxh2H Kb8H 18.a6H Kc7H 19.a7H g3+H 20.Kxg3

 18	+0.40	1372.3M	18:52.38	++ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5 h4 6.Kh3 Kb7 7.c4 Ka6 8.b4 f5 9.c5 Kb5 10.Kh2 g4 11.Kg2 h3+ 12.Kg3 h2 13.Kxh2 Ka6 14.c6 Ka7 15.b5 Ka8 16.b6 f4 17.Kg2 g3 18.c7 Kb7H 19.c8=Q+H Kxc8H 20.a6H Kb8

 18	+0.01	1200.9M	16:29.34	t+ 1.Ke2 h5 2.Kf2 g5 3.Kg2 Kd7 4.a4 Kc6 5.a5H h4H 6.Kh3H Kb7H 7.c4H Ka6H 8.b4H f5H 9.c5H Kb5H 10.Kh2H g4H 11.Kg2H h3+H {HT} {0}

 18	0.00	900.5M	12:14.42	t  1.a4 h5 2.a5 Kd8 3.c4 h4 4.Ke2 Kc7 5.c5 Kb7 6.Kf3 f5 7.Kf2 f4 8.Kg2 Kb8 9.Kg1 Kb7 10.Kg2 {0}
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