Test position

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David Dahlem
Posts: 900
Joined: Wed Mar 08, 2006 9:06 pm

Test position

Post by David Dahlem »

I saw this position in one of my gambit games. What's the best move here? And can White draw?

[d] r7/8/2p2p2/4k3/p5p1/R3KPP1/6P1/8 w - - 6 36
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Eelco de Groot
Posts: 4663
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test position

Post by Eelco de Groot »

I don't think that White can draw this, the two passed pawns are too strong, even if they are separated by one file they are still almost as strong as two connected passers. If the White King tries to block the c-pawn the pawns on the Kingside are in danger.

Scores are falling for every iteration, with even two fail lows in a row at the end.

[d]r7/8/2p2p2/4k3/p5p1/R3KPP1/6P1/8 w - -

Engine: Rainbow Serpent 1.6.3s(dc) Build 110 (Athlon 2009 MHz, 128 MB)
by Tord Romstad, Marco Costalba, Joona Kiiski Modifications: Dann Corbit

1.00 0:00 -1.49 1.fxg4 (61) 0

2.00 0:00 -1.49 1.fxg4 c5 2.Ra1 (119) 0

3.00 0:00 -1.61 1.fxg4 c5 2.Kd3 Kd5 (367) 2

4.00 0:00 -1.37 1.fxg4 c5 2.Kd3 Kd5 3.Ra1 (1.004) 5

5.00 0:00 -1.57 1.fxg4 c5 2.Kd3 Kd5 3.Kc2 c4 (1.673) 8

6.00 0:00 -1.45 1.fxg4 c5 2.Kd3 Kd5 3.Ra1 a3 4.Kc3 (3.107) 16

7.00 0:00 -1.33 1.fxg4 Kd5 2.Kd3 c5 3.Kc3 Ra7 4.Ra1 a3
5.Rd1+ Ke5 6.Ra1 (10.385) 55

8.00 0:00 -1.41 1.fxg4 Kd5 2.Kd3 c5 3.Kc3 Ra7 4.Ra1 a3
5.Kb3 c4+ 6.Kc3 (14.219) 69

9.00 0:00 -1.41 1.fxg4 Kd5 2.Kd3 c5 3.Kd2 Ra7 4.Kc3 c4
5.Ra2 a3 6.Ra1 a2 7.Kb2 (24.699) 112

10.00 0:00 -1.41 1.fxg4 Kd5 2.Kd3 c5 3.Kd2 Ra7 4.Kc3 c4
5.Ra2 a3 6.Ra1 a2 7.Kb2 Rb7+ 8.Kc3 (35.170) 149

11.00 0:00 -1.61-- 1.fxg4 Kd5 2.Kd2 c5 3.Kd3 Kc6 4.Kc3 Kb5
5.Ra1 Rg8 (73.824) 261

12.00 0:00 -1.69 1.fxg4 Kd5 2.Kd2 c5 3.Kd3 Kc6 4.Kc3 Kb5
5.Ra1 Rg8 6.Rb1+ Ka5 7.Kc4 Rxg4+
8.Kxc5 a3 9.Ra1 Rxg3 10.Kc4 Ka4
11.Ra2 Rg4+ 12.Kc3 (252.616) 489

13.00 0:00 -1.69 1.fxg4 Kd5 2.Kd2 c5 3.Kd3 Kc6 4.Kc3 Kb5
5.Ra1 Rg8 6.Rb1+ Ka5 7.Kc4 Rxg4+
8.Kxc5 a3 9.Ra1 Rxg3 10.Kc4 Ka4
11.Ra2 Rg4+ 12.Kc3 (477.152) 598

14.01 0:01 -1.69 1.fxg4 Kd5 2.Kd2 c5 3.Kd3 c4+ 4.Kc2 Kd4
5.Kd1 Kc5 6.Kc2 Kd5 7.Kd1 Kd4 8.Kc2 Ra7
9.Rf3 (847.780) 686

15.01 0:01 -1.89-- 1.fxg4 Kd5 2.Kd3 c5 3.Kd2 Kd4 4.Rf3 a3
5.Rf4+ Ke5 6.Rf5+ Ke6 7.Rxc5 a2 (1.432.598) 751

15.06 0:03 -1.73 1.Kd3 Kd5 2.Kc3 c5 3.Ra2 Re8 4.Rd2+ Kc6
5.Kc4 a3 6.Rf2 f5 7.fxg4 Re4+ 8.Kb3 Re3+
9.Kc4 fxg4 10.Rf6+ Kd7 11.Kxc5 Rxg3 (2.410.995) 771

16.01 0:04 -1.65 1.Kd3 Kd5 2.Kc3 f5 3.Ra2 gxf3 4.gxf3 Rg8
5.Kd3 c5 6.Rxa4 Rxg3 7.Ke3 Rh3 8.Ra5 Rh4
9.Ra8 Rd4 10.Rc8 f4+ 11.Ke2 Rb4 (3.697.036) 785

17.01 0:06 -1.45++ 1.Kd3 Kd5 2.Kc3 f5 3.Ra2 gxf3 4.gxf3 Rg8
5.Kd3 c5 6.Rxa4 Rxg3 7.Ke3 Rh3 8.Ra5 Rh4
9.Ra8 Rd4 10.Rd8+ Kc4 11.Rf8 Rd3+
12.Kf2 (5.095.351) 797

18.01 0:10 -1.85 1.Kd3 Kd5 2.Kc3 c5 3.Ra2 a3 4.Rd2+ Kc6
5.Ra2 Kb5 6.Ra1 f5 7.fxg4 fxg4
8.Rb1+ Kc6 9.Ra1 Kd5 10.Rd1+ Ke5
11.Ra1 a2 12.Kb2 c4 (8.497.651) 816

19.01 0:18 -2.02 1.Kd3 Kd5 2.Kc3 c5 3.Ra2 a3 4.Rd2+ Kc6
5.Ra2 Kb5 6.Ra1 f5 7.fxg4 fxg4
8.Rb1+ Ka4 9.Ra1 Re8 10.Kd3 Kb3
11.Rb1+ Ka2 12.Rb6 Ka1 13.Kc4 Re5
14.Rg6 (15.286.617) 844

20.01 0:34 -2.06 1.Kd3 Kd5 2.Kc3 c5 3.Ra1 a3 4.Rd1+ Kc6
5.fxg4 Re8 6.Rf1 Kb5 7.Kb3 Re3+
8.Ka2 Kb4 9.Rxf6 Re2+ 10.Kb1 Rxg2
11.Rb6+ Kc4 12.Ra6 Rxg3 13.Ka2 Kb4
14.Rb6+ (29.735.362) 864

21.01 0:50 -2.22 1.Kd3 Kd5 2.Kc3 c5 3.fxg4 c4 4.Kb2 Rb8+
5.Kc2 Rb3 6.Rxa4 Rxg3 7.Ra6 Ke5
8.Kb2 Rxg2+ 9.Kc3 Rxg4 10.Ra5+ Ke6
11.Ra6+ Kf5 12.Ra5+ Kg6 13.Ra6 Re4
14.Rd6 (43.962.648) 874

22.01 1:20 -2.46 1.Kd3 Kd5 2.Kc3 c5 3.Ra2 a3 4.Rd2+ Kc6
5.Ra2 Kb5 6.Ra1 f5 7.Rb1+ Ka4 8.Rb7 c4
9.f4 a2 10.Kb2 c3+ 11.Kxa2 Re8
12.Kb1 Re2 13.Ra7+ Kb3 14.Rb7+ (70.662.278) 882

23.01 2:40 -2.74 1.Kd3 Kd5 2.Kc3 c5 3.fxg4 c4 4.Kb2 Kd4
5.Kb1 Rb8+ 6.Kc2 Rb3 7.Rxa4 Rxg3
8.Kd1 Rxg2 9.Ra6 Ke5 10.Ra5+ Ke6
11.Ra6+ Kf7 12.Kc1 Kg6 13.Kb1 Kg5
14.Kc1 (140.211.581) 873

24.01 3:31 -2.74 1.Kd3 Kd5 2.Kc3 c5 3.fxg4 c4 4.Kb2 Kd4
5.Kb1 Rb8+ 6.Kc2 Rb3 7.Rxa4 Rxg3
8.Kd1 Rxg2 9.Ra6 Ke5 10.Ra5+ Ke6
11.Ra6+ Kf7 12.Kc1 Kg6 13.Kb1 Kg5
14.Kc1 (183.994.281) 871

25.01 4:44 -2.82 1.Kd3 Kd5 2.Kc3 c5 3.fxg4 c4 4.Kb2 Kd4
5.Kb1 Rb8+ 6.Kc2 Rb3 7.Rxa4 Rxg3
8.Kd1 Rxg2 9.Ra6 Ke5 10.Ra5+ Ke6
11.Ra6+ Kf7 12.Kc1 Rxg4 13.Kc2 Re4
14.Kc3 (247.306.666) 869

26.01 6:03 -2.82 1.Kd3 Kd5 2.Kc3 c5 3.fxg4 c4 4.Kb2 Kd4
5.Kb1 Kc5 6.Rf3 Ra6 7.Re3 Rb6+ 8.Kc2 Rb3
9.Re8 a3 10.Rc8+ Kd5 11.Rd8+ Ke6
12.Re8+ Kd7 13.Ra8 Rxg3 14.Ra6 (316.240.622) 869

27.01 9:31 -3.03-- 1.Kd3 Kd5 2.fxg4 c5 3.Kc2 c4 4.Kb2 Kc5
5.Ra1 Kb4 6.Rf1 a3+ 7.Ka1 c3 8.Rf4+ Kb3
9.Rxf6 Rc8 10.Kb1 a2+ 11.Ka1 c2
12.Rb6+ Kc3 (489.202.427) 855

28.01 18:05 -3.83-- 1.Kd3 Kd5 (916.713.147) 844

best move: Ke3-d3 time: 24:40.453 min n/s: 840.127 nodes: 1.243.770.243

Regards, 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

Post by zullil »

David Dahlem wrote:I saw this position in one of my gambit games. What's the best move here? And can White draw?

[d] r7/8/2p2p2/4k3/p5p1/R3KPP1/6P1/8 w - - 6 36
Here's Stockfish-1.6.3 (8 threads) through depth 33:

Code: Select all

Searching: r7/8/2p2p2/4k3/p5p1/R3KPP1/6P1/8 w - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
 2     -1.54   00:01       90 fxg4 c5 
 3     -1.49   00:01      276 fxg4 c5 Ra1 
 4     -1.54   00:01      723 fxg4 c5 Kd3 Kd5 
 5     -1.41   00:01     1347 fxg4 c5 Kd3 Kd5 Ra1 
 6     -1.62   00:01     2276 fxg4 c5 Kd3 Kd5 Kc3 Ra7 
 7     -1.49   00:01     6182 fxg4 c5 Kd3 Kd5 Kc3 Ra7 Kd2 Kc4 Kc2 Kd5 
 8     -1.41   00:01    13736 fxg4 c5 Kd3 Kd5 Kc2 c4 Kc3 Ra6 Ra1 a3 Rd1+ Kc5 
 9     -1.54   00:01    27934 fxg4 c5 Kd3 Kd5 Kc2 Kc4 Kd2 Rd8+ Kc2 Kb5 Rf3 Rd6 
10     -1.62   00:01    45401 fxg4 c5 Kd3 Kd5 Kc2 Kc4 Rf3 a3 Kb1 a2+ Ka1 Ra6 
                              Rf1 
11  <  -1.90   00:01   119757 fxg4 c5 Kd3 Kd5 Kc2 c4 Kd2 Kd4 Kc2 Ra6 Kd2 Rb6 
11     -1.74   00:01   361285 Ra2 Kd5 Kd3 c5 Kc3 Rg8 Rxa4 gxf3 gxf3 Rxg3 Rf4 
                              Ke5 Re4+ Kd5 
12     -1.86   00:01   444204 Ra2 Kd5 Kd3 c5 Kc3 Rg8 Rxa4 gxf3 gxf3 Rxg3 Rf4 
                              Ke5 Re4+ Kf5 Re3 Kf4 Re6 Rxf3+ Kc4 
12     -1.62   00:01   512410 Kd3 Kd5 Kc3 c5 Ra2 a3 Rd2+ Kc6 Ra2 gxf3 gxf3 Kd5 
                              Rd2+ Ke5 Ra2 Kd5 
13     -1.82   00:01   594053 Kd3 Kd5 Kc3 c5 Ra2 Rg8 Rxa4 gxf3 gxf3 Rxg3 Rf4 
                              Ke5 Re4+ Kf5 Re3 Kf4 Re6 Kf5 
14     -1.74   00:01   830245 Kd3 Kd5 Kc3 c5 Ra2 Rg8 Rxa4 gxf3 gxf3 Rxg3 Rf4 
                              Ke5 Re4+ Kd6 Rf4 Ke6 Kd3 
15     -1.86   00:01    1183k Kd3 Kd5 Kc3 c5 Ra2 a3 Rd2+ Kc6 Ra2 Kb5 Ra1 f5 
                              Rb1+ Ka4 fxg4 fxg4 Kc4 Rc8 Ra1 
16     -2.14   00:01    4469k Kd3 Kd5 Kc3 f5 fxg4 fxg4 Ra2 Re8 Kb4 Re4+ Ka3 c5 
                              Rd2+ Kc4 Rb2 Kd3 Rb1 c4 Kxa4 c3+ Kb3 
17     -2.22   00:02   12247k Kd3 Kd5 Kc3 c5 Ra1 a3 Rd1+ Kc6 Ra1 Kb5 Rb1+ Ka4 
                              Rb6 f5 Rb7 c4 Rb1 a2 Ra1 Kb5 Kb2 Kb4 Rxa2 Re8 Kb1 
                              Re1+ Kb2 Re2+ Kb1 Re1+ 
18     -2.06   00:02   14384k Kd3 Kd5 Kc3 c5 Ra1 a3 Rd1+ Kc6 Kb3 gxf3 gxf3 Kb5 
                              Ra1 c4+ Kc3 a2 Kb2 Rd8 Kxa2 Rd3 Rf1 Kb4 Kb1 c3 g4 
19     -2.26   00:03   21500k Kd3 Kd5 Kc3 c5 Ra1 a3 Rd1+ Kc6 Ra1 Kb5 Rb1+ Ka4 
                              Rb6 f5 f4 Ra7 Rb8 Ra6 Rb7 Ra8 Rb6 c4 Rb4+ Ka5 Rb1 
                              a2 Ra1 Kb5 Kb2 Kc5 Rxa2 c3+ Kb1 Rxa2 Kxa2 Kd4 Kb1 
                              Kd3 Kc1 c2 
20     -2.30   00:04   29271k Kd3 Kd5 Kc3 c5 Ra1 a3 Rd1+ Kc6 fxg4 Ra4 Kb3 Rxg4 
                              Kxa3 Rxg3+ Ka4 Rxg2 Rf1 Rg6 Kb3 Kb5 Kc3 Rh6 Rf3 
                              Kc6 Kd3 Kd5 Rf5+ Kd6 
21     -2.14   00:05   35358k Kd3 Kd5 Kc3 c5 Ra1 a3 Rd1+ Kc6 fxg4 Ra4 Kb3 Rxg4 
                              Kxa3 Rxg3+ Ka4 Rxg2 Rf1 Rg6 Kb3 Kb5 Kc3 Rg3+ Kd2 
                              Rg2+ Kc3 Rg6 Rf4 Kc6 Rf1 Rh6 Kc4 Rh4+ Kc3 Rh3+ 
                              Kc4 Rh4+ 
22     -2.30   00:06   49943k Kd3 Kd5 Kc3 c5 fxg4 c4 Ra1 a3 Ra2 Kc5 g5 fxg5 g4 
                              Kb5 g3 Ra6 Ra1 a2 Kb2 Kc5 Rxa2 c3+ Kb3 Rxa2 Kxa2 
                              Kc4 Kb1 Kd3 Kc1 c2 
23     -2.75   00:09   75268k Kd3 Kd5 Kc3 c5 Ra1 a3 Rd1+ Kc6 Ra1 Kb5 Rb1+ Ka4 
                              Rb7 f5 Rc7 a2 Kb2 Kb5 Ka1 c4 Rf7 gxf3 Rxf5+ Kb4 
                              gxf3 c3 Rf4+ Kb3 Rf7 c2 Rb7+ Ka3 Rc7 Rb8 Ra7+ Kb3 
                              Rc7 Rg8 
24     -2.87   00:13  114479k Kd3 Kd5 Kc3 c5 Ra1 a3 Rd1+ Kc6 Ra1 Kb5 Rb1+ Ka4 
                              Rb7 f5 Rc7 a2 Kb2 Kb5 Ka1 c4 fxg4 fxg4 Rg7 Kc5 
                              Rxg4 c3 Rg7 Kc4 Rc7+ Kd3 Rd7+ Ke2 Re7+ Kd2 Rd7+ 
                              Kc1 g4 Ra4 
25     -2.95   00:21  205070k Kd3 Kd5 Kc3 c5 fxg4 c4 Kb2 Kd4 Kb1 Kc5 Rf3 Ra6 
                              Re3 a3 Ka2 Kd4 Re8 c3 Rc8 Kd3 Rd8+ Ke3 Rc8 Kd2 
                              Rd8+ Kc1 Rd3 c2 Rd4 Ra8 Rd3 Ra4 
26  <  -3.23   00:26  255976k Kd3 Kd5 fxg4 c5 Kc2 c4 Kb2 Kd4 Rf3 a3+ Rxa3 Rxa3 
                              Kxa3 c3 Kb3 Kd3 Ka3 c2 Kb2 Kd2 Kb3 c1=Q 
27     -3.60   00:45  451338k Kd3 Kd5 fxg4 c5 Kc2 c4 Kb2 Kd4 Kb1 Kc5 Rf3 Ra6 
                              Ka2 a3 Re3 Kd4 Re8 c3 Rd8+ Ke3 Rc8 Kd2 Rd8+ Kc1 
                              Rd3 c2 Rd4 Ra5 Rd3 Ra4 g5 fxg5 Rd5 g4 Rd3 
28  <  -4.32   01:25  867130k Kd3 Kd5 Kc3 c5 Kb2 c4 Kc2 Kd4 Kb1 Kc5 Re3 a3 Ka2 
                              Ra5 f4 Kb4 Re6 c3 Re4+ Kc5 Re1 Kc4 Rc1 Ra8 Kb1 
                              a2+ Ka1 Kb3 Rd1 c2 Rc1 Re8 
29     -4.32   02:16    1357M Kd3 Kd5 Kc2 c5 Rd3+ Kc4 Rd7 a3 Kb1 Rb8+ Ka2 Rb2+ 
                              Kxa3 Rxg2 fxg4 Rxg3+ Ka4 Rxg4 Rf7 Rf4 Ka5 Kd3 Rg7 
                              f5 Rg3+ Kd4 Rg1 Rf3 Rd1+ Kc4 Rc1+ Kd5 Kb6 c4 Rd1+ 
                              Rd3 Rf1 Ke4 Kc5 c3 Re1+ Re3 
30     -4.20   02:51    1663M Kd3 Kd5 Kc2 c5 Rd3+ Kc4 Rd7 a3 Kb1 Rb8+ Ka2 Rb2+ 
                              Kxa3 Rxg2 fxg4 Rxg3+ Kb2 Rxg4 Kc2 f5 Rf7 f4 Kd2 
                              Rg2+ Ke1 Kd3 Rd7+ Kc3 Rf7 c4 Rxf4 Kb3 Rf7 c3 Rb7+ 
                              Kc2 Ra7 Rd2 Rf7 Kc1 Rc7 c2 Rb7 Rd4 Ke2 Re4+ Kd3 
                              Kd1 Rc7 
31  <  -5.17   04:31    2620M Kd3 Kd5 fxg4 c5 Kc2 c4 g5 fxg5 Kc3 Kc5 g4 Ra5 g3 
                              Ra8 Ra2 a3 Re2 Kd5 Kc2 a2 Rd2+ Kc5 
32  <  -9.17   11:47    6952M Kd3 Kd5 Kc2 c5 Rd3+ Kc4 Rd6 Kb5 Kb1 a3 Ka2 c4 Rd7 
                              Ra5 Rd1 Kc5 Rc1 Kb4 Rb1+ Ka4 Rc1 Rc5 f4 c3 Kb1 
                              c2+ Ka2 Kb4 
33     -6.75   40:09   23789M Kd3 Kd5 Kc2 c5 Rd3+ Kc4 Rd7 a3 Kb1 Rb8+ Ka2 Rb2+ 
                              Kxa3 Rxg2 fxg4 Rxg3+ Kb2 Rxg4 Rf7 Rg2+ Kb1 Rf2 
                              Kc1 Kd3 Rd7+ Ke3 Kd1 c4 Re7+ Kd3 Rd7+ Kc3 Ke1 Rb2 
                              Kd1 f5 Rd8 f4 Rf8 Rd2+ Ke1 Rd4 Ke2 Re4+ Kd1 Kd3 
                              Rf7 Ke3 Rg7 Rd4+ Kc2 f3 Rg3 Ke2 Kc3 f2 Rg2
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