pawn racing

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lech
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pawn racing

Post by lech » Mon Jun 21, 2010 4:38 pm

[d] 8/p2K4/P5B1/8/3n4/2k2p2/2P2P2/8 w - -
1.Kd6!
Which engine is able to find this solution faster than others? :D

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David Dahlem
Posts: 900
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Re: pawn racing

Post by David Dahlem » Mon Jun 21, 2010 5:16 pm

lech wrote:[d] 8/p2K4/P5B1/8/3n4/2k2p2/2P2P2/8 w - -
1.Kd6!
Which engine is able to find this solution faster than others? :D
Thanks, great test position. Stockfish 1.7.1 takes 13:42 to find Kd6 ...

30 01:39 139.221.166 1.398.547 +13.45 Kd7c7 Kc3b4 Kc7b7 Kb4b5 Bg6e8+ Kb5a5 Kb7xa7 Nd4e6 Be8f7 Ne6c5 Bf7c4 Ka5b4 Ka7b6 Nc5xa6 Bc4xa6 Kb4c3 Ba6d3 Kc3d2 Kb6b5 Kd2c3 Kb5c5 Kc3b2 Kc5b4 Kb2c1 c2c4 Kc1d2 Bd3e4 Kd2e2 c4c5 Ke2xf2 Be4xf3 Kf2g3 c5c6 Kg3f4 c6c7
31+ 03:02 245.805.349 1.347.920 +17.17 Kd7c7 Kc3b2 Kc7b7 Nd4b5 c2c4 Nb5c3 Kb7xa7 Nc3d1 Ka7b8 Nd1xf2 a6a7 Kb2c3 a7a8Q Kc3d2
31- 03:16 263.640.811 1.342.216 +9.73 Kd7c7 Kc3b4 Kc7b7 Kb4c5 c2c3 Nd4e6 Bg6f5 Ne6g7
31+ 04:15 340.292.704 1.330.812 +20.88 Kd7c7 Kc3b4 Kc7b7 Kb4c5 c2c3 Nd4e6 Bg6f5 Ne6g7 Bf5g4 Kc5d6 c3c4 Ng7e8 Bg4xf3 Ne8g7 c4c5+ Kd6xc5 Kb7xa7 Ng7e8 Ka7b7 Ne8d6+ Kb7b8 Nd6c4 a6a7 Nc4b6 Kb8c7 Kc5b5 Kc7b7 Kb5a5 Bf3c6 Nb6c4 a7a8Q+ Ka5b4 Bc6f3 Nc4d2 Kb7c7 Kb4b3 Qa8d5+
31+ 05:33 438.669.771 1.315.229 +28.32 Kd7c7 Kc3b4 Kc7b7 Nd4e6 Kb7xa7 Kb4b5 Bg6e8+ Kb5b4 Ka7b8 Kb4c3 a6a7 Kc3b2 a7a8Q Ne6g5 Qa8a5 Ng5h7 Qa5e5+
31+ 06:20 497.587.270 1.307.073 +43.19 Kd7c7 Kc3b4 Kc7b7 Nd4e6 Kb7xa7 Kb4b5 Bg6e8+ Kb5b4 Ka7b8 Kb4c3 a6a7 Kc3b2 a7a8Q Ne6d4 Qa8a5 Nd4xc2 Qa5b6+ Kb2c1 Kb8b7 Kc1d1 Qb6a5 Nc2e3 f2xe3 Kd1e2 Qa5f5 Ke2e1 Qf5xf3
31 06:41 523.700.963 1.304.868 +28.36 Kd7c7 Kc3b4 Kc7b7 Kb4c5 c2c3 Nd4e6 Bg6f5 Ne6g7 Bf5g4 Kc5d6 c3c4 Ng7e8 Bg4xf3 Ne8g7 c4c5+ Kd6xc5 Kb7xa7 Ng7e8 Ka7b7 Ne8d6+ Kb7b8 Nd6b5 Bf3e2 Nb5d4 Kb8b7 Nd4c6 Be2f3 Nc6e5 a6a7 Kc5b4 a7a8Q Ne5d3 Qa8d8 Kb4c3 Bf3e2 Nd3b4 f2f4 Kc3b2 f4f5 Nb4c2 f5f6 Nc2a1 f6f7 Na1b3 f7f8Q Kb2a2 Qd8d3 Nb3a5+ Kb7b6
32- 07:51 612.809.655 1.301.341 +12.24 Kd7c7 Kc3d2 Kc7b7 Kd2e1 Kb7xa7 Ke1xf2 Ka7b6 Kf2g1 a6a7 f3f2 Bg6d3 Nd4xc2
32+ 08:27 660.279.947 1.300.162 +44.48 Kd7c7 Kc3d2 Kc7b7 Kd2e1 Kb7xa7 Ke1xf2 Ka7b6 Kf2g1 a6a7 f3f2 Bg6d3 Nd4xc2 a7a8Q Nc2e1 Qa8g8+
32+ 09:27 737.404.261 1.299.784 +60.60 Kd7c7 Kc3d2 Kc7b7 Kd2e1 Kb7xa7 Ke1xf2 Ka7b6 Kf2g1 a6a7 f3f2 Bg6d3 Nd4xc2 a7a8Q Nc2e1 Qa8g8+ Ne1g2 Qg8f8 Ng2e1 Qf8g7+ Kg1h2
32 11:03 876.714.945 1.322.407 +5.57 Kd7c7 Nd4xc2 Bg6xc2 Kc3xc2 Kc7b7 Kc2d1 Kb7xa7 Kd1e2 Ka7b7 Ke2xf2 a6a7 Kf2g1 a7a8Q f3f2 Qa8g8+ Kg1h2 Qg8c4 Kh2g2 Qc4g4+ Kg2h2 Qg4f3 Kh2g1 Qf3g3+ Kg1h1 Qg3d3 Kh1g2 Qd3d5+ Kg2g1 Qd5d4 Kg1g2 Qd4g7+ Kg2h3 Qg7f6 Kh3g2 Qf6g5+ Kg2h2 Qg5e5+ Kh2g2 Qe5e4+ Kg2h2 Qe4h7+ Kh2g2 Qh7c2 Kg2g1 Qc2g6+ Kg1h2 Qg6d6+ Kh2g2 Qd6c6+ Kg2h2 Qc6b5 Kh2g1 Qb5b6 Kg1g2 Qb6b2 Kg2g1 Qb2g7+ Kg1h2 Qg7f7
33 11:22 911.338.673 1.335.050 +5.97 Kd7c7 Nd4xc2 Bg6xc2 Kc3xc2 Kc7b7 Kc2d1 Kb7xa7 Kd1e2 Ka7b7 Ke2xf2 a6a7 Kf2g1 a7a8Q f3f2 Qa8g8+ Kg1h2 Qg8c4 Kh2g2 Qc4g4+ Kg2h2 Qg4f3 Kh2g1 Qf3g3+ Kg1h1 Qg3d3 Kh1g2 Qd3d5+ Kg2g1 Qd5d4 Kg1g2 Qd4e4+ Kg2h2 Qe4h7+ Kh2g2 Qh7c2 Kg2g1 Qc2g6+ Kg1h2 Qg6d6+ Kh2h1 Qd6f8 Kh1g1 Qf8g7+ Kg1h2 Qg7a1 Kh2g2 Qa1b2 Kg2g1 Qb2b6 Kg1g2 Qb6c6+ Kg2g1 Qc6g6+
34 12:15 1.009.822.251 1.373.528 +5.45 Kd7c7 Nd4xc2 Bg6xc2 Kc3xc2 Kc7b7 Kc2d1 Kb7xa7 Kd1e2 Ka7b7 Ke2xf2 a6a7 Kf2g1 a7a8Q f3f2 Qa8g8+ Kg1h2 Qg8c4 Kh2g2 Qc4g4+ Kg2h2 Qg4f3 Kh2g1 Qf3g3+ Kg1h1 Qg3d3 Kh1g2 Qd3d5+ Kg2g1 Qd5g5+ Kg1h1 Qg5c1+ Kh1g2 Qc1c2 Kg2g1 Qc2g6+ Kg1h1 Qg6a6 Kh1g2 Qa6e2 Kg2g1 Qe2e3 Kg1g2 Qe3e4+ Kg2g1 Qe4d4 Kg1h1 Qd4f6 Kh1g2 Qf6b2 Kg2g1 Qb2g7+ Kg1h1 Qg7f7 Kh1g2 Qf7a2 Kg2g1
35+ 12:45 1.066.011.856 1.392.796 +6.18 Kd7c7 Nd4xc2 Bg6xc2 Kc3xc2 Kc7b7 Kc2d1 Kb7xa7 Kd1e2 Ka7b6 Ke2xf2 a6a7 Kf2g1 a7a8Q f3f2 Qa8g8+ Kg1h2 Qg8b8+ Kh2g2 Qb8b7+ Kg2h2 Qb7c7+ Kh2h1 Qc7c6+ Kh1g1 Qc6g6+ Kg1h2 Qg6d3 Kh2g2 Qd3e2 Kg2g1 Qe2g4+ Kg1h1 Qg4f3+ Kh1g1 Qf3g3+ Kg1h1 Qg3f4 Kh1g2 Qf4e4+ Kg2g1 Qe4g4+
35- 13:04 1.102.076.737 1.404.311 +4.72 Kd7c7 Nd4xc2 Bg6xc2 Kc3xc2 Kc7b7 Kc2d1 Kb7xa7 Kd1e2 Ka7b6 Ke2xf2 a6a7 Kf2g1 a7a8Q f3f2 Qa8g8+ Kg1h2 Qg8b8+ Kh2g2 Qb8b7+ Kg2h2 Qb7c7+ Kh2h1 Qc7c6+ Kh1g1 Qc6g6+ Kg1h2 Qg6d3 Kh2g2 Qd3e2 Kg2g1 Qe2g4+ Kg1h1 Qg4h3+ Kh1g1 Qh3e3 Kg1g2 Qe3g5+ Kg2h2 Qg5c1 Kh2g2 Qc1b2 Kg2f3 Qb2a1 Kf3g2 Qa1a2 Kg2g1 Qa2g8+
35+ 13:42 1.148.079.151 1.395.788 +6.90 Kd7d6 Kc3c4 Bg6e4 Kc4c3 Kd6d5 Nd4xc2 Be4xc2 Kc3xc2 Kd5e4 Kc2c3 Ke4xf3 Kc3d4 Kf3f4 Kd4c5 Kf4e5 Kc5c6 f2f4 Kc6d7 Ke5f6 Kd7d6 f4f5 Kd6c5 Kf6g6
35+ 14:20 1.195.665.424 1.389.854 +8.36 Kd7d6 Kc3c4 Bg6e4 Kc4c3 Kd6d5 Kc3b4 Kd5xd4 Kb4a5 Be4xf3 Ka5xa6 c2c4 Ka6a5 c4c5 a7a6 c5c6 Ka5b6
35+ 17:55 1.470.894.443 1.368.034 +11.27 Kd7d6 Kc3d2 Kd6d5 Nd4e2 Kd5c6 Ne2c3 Kc6b7 Kd2e2 Kb7xa7 Ke2xf2 Bg6d3
35 25:14 2.030.289.818 1.340.511 +16.56 Kd7d6 Kc3c4 Bg6e4 Kc4b5 Kd6d5 Nd4e2 c2c4+ Kb5xa6 Be4xf3 Ne2c3+ Kd5d6 Ka6a5 c4c5 Ka5a6 Kd6d7 Ka6b5 c5c6 Nc3a4 Kd7d6 Na4b6 Bf3e2+ Kb5b4 c6c7 Nb6c8+ Kd6d7 Nc8b6+ Kd7c6 Kb4b3 Be2g4 Kb3c3 f2f4 Kc3d4 Kc6b7 Nb6c4 Bg4e6 Nc4d6+ Kb7c6 Nd6e4 c7c8Q Kd4e3 f4f5 Ne4g5 Qc8a6 Ng5f3 Qa6xa7+ Ke3f4 f5f6 Nf3e5+ Kc6d5

Edmund
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Re: pawn racing

Post by Edmund » Mon Jun 21, 2010 5:22 pm

lech wrote:8/p2K4/P5B1/8/3n4/2k2p2/2P2P2/8 w - -
1.Kd6!
Which engine is able to find this solution faster than others? :D
are you sure this is not drawn??

if the white king goes to capture Kxa7, then the black king goes to c7, blocking the king and the c-pawn, while the knight is guarding the path of the f-pawn.

plan B, white king goes and threatens Pf3. Then the knight defends the square from d4 with the king guarding the knight. If then Bxf3, the Bishop stops defending c2 and the knight can capture it. Now the Knight has to sacrifice itself for the pawn and the remaining white rook pawn has the wrong color to the white bishop.

lech
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Re: pawn racing

Post by lech » Mon Jun 21, 2010 5:31 pm

Edmund wrote:Then the knight defends the square from d4 with the king guarding the knight.
It seems to be very hard to do it. :?

lech
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Re: pawn racing

Post by lech » Mon Jun 21, 2010 5:35 pm

David Dahlem wrote:
lech wrote:[d] 8/p2K4/P5B1/8/3n4/2k2p2/2P2P2/8 w - -
1.Kd6!
Which engine is able to find this solution faster than others? :D
Thanks, great test position. Stockfish 1.7.1 takes 13:42 to find Kd6 ...
It is realy a valuable position. Stockfish has a trouble since doesnt use EGTB. I recommend to use Houdini. Houdini has a code to play KQ vs KP with relative pawn a7 (c7,f7,h7).

lech
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Re: pawn racing

Post by lech » Mon Jun 21, 2010 7:00 pm

Houdini has another problem and probably can't solve it.
Maybe Stockfish is realy the best in endgames. :D
It would be fine to test this position with 8-cpu by many engines. :roll:

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David Dahlem
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Re: pawn racing

Post by David Dahlem » Mon Jun 21, 2010 7:04 pm

lech wrote:Houdini has another problem and probably can't solve it.
Maybe Stockfish is realy the best in endgames. :D
It would be fine to test this position with 8-cpu by many engines. :roll:
Given more time, i think Stockfish would find a forced mate in this position, without tablebases.

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Houdini
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Re: pawn racing

Post by Houdini » Mon Jun 21, 2010 8:21 pm

lech wrote:Houdini has another problem and probably can't solve it.
Maybe Stockfish is realy the best in endgames. :D
Using 4 cores Houdini 1.02 finds Kd6 at depth 31 in about 2 minutes:

Code: Select all

 30/67	 0:32 	+3.66 	1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd4 4.Kc7 Ke5 5.Kb7 Kd6 6.f4 Nd5 7.f5 Nf6 8.Bf1 Ng8 9.Bd3 Nf6 10.Bc4 Ne4 11.Be6 Nf6 12.Bb3 Kd7 13.Bc2 Kd6 14.Bd3 (316.765.735) 9761
 31/67	 0:44 	+3.66 	1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd4 4.Kc7 Ke5 5.Kb7 Kd6 6.f4 Nd5 7.f5 Nf6 8.Bf1 Ng8 9.Bd3 Nf6 10.Bc4 Ne4 11.Be6 Nf6 12.Bb3 Kd7 13.Bc2 Kd6 14.Bd3 (442.939.355) 9879
 31/67	 1:33 	+3.83++	1.Kd6 Nxc2 2.Bxc2 Kxc2 3.Ke5 Kc3 4.Ke4 Kc4 5.Kxf3 Kb5 6.Ke4 Kxa6 7.f4 Kb6 8.f5 Kc7 9.Kd5 a5 10.f6 Kd7 (905.212.116) 9677
 31/67	 2:09 	+4.18++	1.Kd6 Nxc2 2.Bxc2 Kxc2 3.Ke5 Kc3 4.Ke4 Kc4 5.Kxf3 Kb5 6.Ke4 Kxa6 7.f4 Kb6 8.f5 Kc7 9.Kd5 a5 10.f6 Kd7 (1.232.771.099) 9491
 31/67	 3:50 	+5.03++	1.Kd6 Nxc2 2.Bxc2 Kxc2 3.Ke5 Kc3 4.Ke4 Kc4 5.Kxf3 Kb5 6.Ke4 Kxa6 7.f4 Kb6 8.f5 Kc7 9.Kd5 a5 10.f6 Kd7 (2.176.355.959) 9444
Stockfish is indeed very good in endgames that require deep analysis, because of its aggressive pruning it goes deeper than most other engines.

Robert

mhalstern
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Re: pawn racing

Post by mhalstern » Mon Jun 21, 2010 8:22 pm

Rybka 4 finds the move instantly:

New game
8/p2K4/P5B1/8/3n4/2k2p2/2P2P2/8 w - - 0 1

Analysis by Deep Rybka 4 SSE42 x64:

1.Be4 Kd2 2.Kd6 Nxc2 3.Bxf3 Nb4 4.Bb7 Nd3 5.f3 Nf4
+/- (0.90) Depth: 6 00:00:00 1kN
1.Be4 Kd2 2.Kd6 Nxc2 3.Bxf3 Nb4 4.Bb7 Nd3 5.f3 Ke2 6.Be4
+/- (0.93) Depth: 7 00:00:00 1kN
1.Kc7 Ne6+ 2.Kb7
+/- (1.02 !) Depth: 7 00:00:00 2kN
1.Kc7 Ne6+ 2.Kd6 Nf4
+/- (1.17 !) Depth: 7 00:00:00 2kN
1.Kc7 Ne6+ 2.Kd6 Nf4
+- (1.57 !) Depth: 7 00:00:00 2kN
1.Kc7 Ne6+ 2.Kd6 Nf4
+- (2.37 !) Depth: 7 00:00:00 2kN
1.Kc7 Ne6+ 2.Kb7 Nf4 3.Be4 Nh3 4.Kxa7 Nxf2 5.Bxf3 Kxc2 6.Kb6 Kd3
+- (2.44) Depth: 7 00:00:00 3kN
1.Kc7 Ne6+ 2.Kb7 Nf4 3.Be4 Nh3 4.Kxa7 Nxf2 5.Bxf3 Kxc2 6.Kb6 Kd3 7.a7 Kd2 8.a8Q Nd3
+- (2.56 !) Depth: 8 00:00:00 4kN
1.Kc7 Ne6+ 2.Kb7 Nf4 3.Be4 Nh3 4.Kxa7 Nxf2 5.Bxf3 Kxc2 6.Kb6 Kd3 7.a7 Kd2 8.a8Q Nd3
+- (2.71 !) Depth: 8 00:00:00 4kN
1.Kc7 Ne6+ 2.Kb7 Kd2 3.Kxa7 Nc5 4.c4 Ke1 5.Bh5 Kxf2 6.Bxf3 Kxf3 7.Kb6 Nd7+
+- (2.08) Depth: 8 00:00:00 6kN
1.Kc7 Ne6+ 2.Kb7 Kd2 3.Kxa7 Nc5 4.c4 Ke1 5.Bh5 Kxf2 6.Bxf3 Kxf3 7.Kb6 Nd7+
+- (2.08) Depth: 9 00:00:00 6kN
1.Kc7 Ne6+ 2.Kb7 Kd2 3.Kxa7 Nc5 4.Bh5 Ke2 5.c4 Kxf2 6.Bxf3 Kxf3 7.Kb6 Nxa6 8.Kxa6 Ke4 9.Kb5 Kd4 10.c5 Kd5
+- (2.20 !) Depth: 10 00:00:00 8kN
1.Kc7 Ne6+ 2.Kb7 Kd2 3.Kxa7 Nc5 4.c4 Ke2 5.Bh5 Kxf2 6.Bxf3 Kxf3 7.Kb6 Nxa6 8.Kxa6 Ke4 9.Kb5 Kd4 10.c5 Kd5
+- (2.35 !) Depth: 10 00:00:00 9kN
1.Kc7 Nxc2 2.Bxc2 Kxc2 3.Kb7 Kd2[] 4.Kxa7
= (0.00) Depth: 10 00:00:00 15kN, tb=1
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bc4 Kc3 5.Bb5 Kd4 6.Kc7 Kc5 7.Bf1 Nc6 8.Kb7 Kd6 9.f4
+/- (1.21) Depth: 10 00:00:00 27kN, tb=2
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bc4 Kc3 5.Bb5 Kd4 6.Kc7 Kc5 7.Bf1 Nc6 8.Kb7 Kd6 9.f4
+/- (1.21) Depth: 11 00:00:00 33kN, tb=3
1.Kd6 Kd2 2.Be4 Ke1 3.Kd5 Nb5 4.Bxf3 Kxf2 5.Kc5 Nc7 6.Bb7 Ne6+ 7.Kd6
+/- (1.33 !) Depth: 11 00:00:00 39kN, tb=6
1.Kd6 Kd2 2.Be4 Ke1 3.Kd5 Nb5 4.Bxf3 Kxf2 5.Kc5 Nc7 6.Bb7 Ne6+ 7.Kd6
+- (1.48 !) Depth: 11 00:00:00 43kN, tb=6
1.Kd6 Kd2 2.Be4 Ke1 3.Kd5 Nb5 4.Bxf3 Kxf2 5.Kc5 Na3 6.Be4 Ke3 7.Bf5 Kf4 8.Bd3
+- (1.50) Depth: 11 00:00:00 44kN, tb=6
1.Kd6 Kd2 2.Be4 Ke1 3.Kd5 Nb5 4.Kc6 Nc3 5.Bxf3 Kxf2 6.Bg4 Kg3 7.Be6 Kf3
+- (1.62 !) Depth: 12 00:00:00 53kN, tb=10
1.Kd6 Kd2 2.Be4 Ke1 3.Kd5 Nb5 4.Kc6 Nc3 5.Bxf3 Kxf2 6.Bg4 Kg3 7.Kb7 Nb5 8.Be2
+- (1.77 !) Depth: 12 00:00:00 57kN, tb=10
1.Kd6 Kd2 2.Be4[] Ke1 3.Kd5[] Nb5 4.Kc6 Nc3 5.Bxf3 Kxf2 6.Bg4 Kg3 7.Kb7 Nb5 8.Be2
+- (2.17 !) Depth: 12 00:00:00 68kN, tb=13
1.Kd6 Kd2 2.Be4[] Ke1 3.Kd5[] Ne2 4.Bxf3[] Nf4+ 5.Ke5 Ng6+ 6.Kd4 Nf4 7.Bd5 Ne2+ 8.Ke5 Kd2 9.c4 Nc1 10.c5 Nd3+ 11.Kd4
+- (2.77) Depth: 12 00:00:00 90kN, tb=16
1.Kd6 Ne2 2.Kc7 Nf4 3.Be4[] Ne6+ 4.Kb8 Nc5 5.Kxa7[] Nxe4 6.Kb8 Nxf2 7.a7
+- (2.89 !) Depth: 13 00:00:01 108kN, tb=23
1.Kd6 Kc4 2.Kc7[] Kc5 3.Kb7[] Kd6 4.Bd3 Nc6 5.Be4 Ke7 6.Bxc6
+- (3.19) Depth: 13 00:00:01 148kN, tb=28
1.Kd6 Kc4 2.Kc7[] Ne6+ 3.Kb7 Nc5+ 4.Kxa7 Kb5 5.Bd3+ Kc6 6.Bh7 Kb5 7.Bf5 Ka5 8.Bd3 Nxa6 9.Bxa6 Kb4 10.Kb7 Kc3 11.Bd3
+- (3.19) Depth: 14 00:00:02 157kN, tb=33
1.Kd6 Kc4 2.Kc7[] Ne6+ 3.Kb7 Nc5+ 4.Kxa7 Kb5 5.Bd3+ Kc6 6.Bh7 Kb5 7.Bf5 Ka5 8.Bd3
+- (3.29) Depth: 15 00:00:02 181kN, tb=41
1.Kd6 Kc4 2.Kc7[] Ne6+ 3.Kb7 Nc5+ 4.Kxa7 Kb5 5.Bd3+ Kc6 6.Bh7 Kb5 7.Bf5 Ka5 8.Bd3
+- (3.41 !) Depth: 16 00:00:03 229kN, tb=55
1.Kd6 Kc4 2.Kc7[] Ne6+ 3.Kb7 Nc5+ 4.Kxa7 Kb5 5.Bd3+ Kc6 6.Bh7 Kb5 7.Bf5 Ka5 8.Bd3[]
+- (3.56 !) Depth: 16 00:00:04 272kN, tb=61
1.Kd6 Kc4 2.Kc7[] Ne6+ 3.Kb7 Nc5+ 4.Kxa7[] Kb5 5.Bd3+ Kc6 6.Bh7 Kb5 7.Bf5 Ka5 8.Bd3[]
+- (3.96 !) Depth: 16 00:00:05 385kN, tb=78
1.Kd6 Kc4 2.Kc7[] Kd5 3.Kb7[] Kd6 4.Bd3 Ne2 5.Be4 Ke5 6.Bxf3[] Nd4 7.Bg4 Kd6 8.Kxa7 Kc7 9.c4 Nc6+[] 10.Ka8 Kb6[] 11.Bc8[] Kc7 12.Bh3 Kb6[] 13.Bg2 Ne5 14.a7
+- (4.15) Depth: 16 00:00:08 577kN, tb=138
1.Kd6 Kc4 2.Kc7[] Kd5 3.Kb7[] Kd6 4.Bd3 Nc6 5.Be4 Ne5 6.Kxa7 Kc7 7.Bd5 Ng4[] 8.Bxf3 Nxf2[] 9.Ka8 Nh3[] 10.a7 Nf4[] 11.Be4 Ne6[] 12.Bd3 Nc5[] 13.Bb5 Ne4[] 14.c4 Nc5[] 15.Be8 Kb6[] 16.Bg6
+- (4.15) Depth: 17 00:00:09 678kN, tb=179
1.Kd6 Kc4 2.Kc7[] Kd5 3.Kb7[] Kd6 4.Be4 Nb5 5.c4 Nd4 6.Kxa7 Kc7 7.Bb7 Nf5[] 8.Ka8 Nd6[] 9.Bd5 Kb6[] 10.c5+ Kxc5 11.Kb8 Nb5 12.Bxf3 Kb6 13.Bb7 Kc5 14.a7 Nxa7 15.Kxa7 Kd4 16.f4
+- (4.27 !) Depth: 18 00:00:11 817kN, tb=227
1.Kd6 Kc4 2.Kc7[] Kd5 3.Kb7[] Kd6 4.Be4 Kd7 5.Kxa7 Kc7 6.c4 Ne6 7.Bxf3 Nc5[] 8.Bb7 Nd3[] 9.f3 Nf4[] 10.Be4 Ne6 11.Bd5 Nf4[] 12.Bb7 Nd3[] 13.Bd5 Nf4[] 14.Bb7 Nd3[] 15.Bd5 Nf4[] 16.Bb7
+- (4.41) Depth: 18 00:00:14 1074kN, tb=334
1.Kd6 Kc4 2.Kc7[] Kd5 3.Kb7 Kd6 4.Be4 Kd7 5.Kxa7 Kc7 6.c4 Ne6 7.Bxf3 Nc5[] 8.Bb7 Nd3[] 9.f3 Nf4[] 10.Be4 Ne6 11.Bd5 Nf4[] 12.Bb7 Nd3[] 13.Bd5 Nf4[] 14.Bb7 Nd3[] 15.Bd5 Nf4[] 16.Bb7
+- (4.41) Depth: 19 00:00:18 1180kN, tb=414
1.Kd6 Kc4 2.Kc7[] Kd5 3.Kb7 Kd6 4.Be4 Kd7 5.Kxa7 Kc7 6.c4 Ne6 7.Bxf3 Nc5[] 8.Bb7 Nd3[] 9.f3 Nf4[] 10.Be4 Ne6 11.Bd5 Nf4[] 12.Bb7 Nd3[] 13.Bd5 Nf4[] 14.Bb7 Nd3[] 15.Bd5 Nf4[] 16.Bb7
+- (4.41) Depth: 20 00:00:20 1330kN, tb=512
1.Kd6 Kc4 2.Kc7 Kd5 3.Kb7 Kd6 4.Be4 Kd7 5.Kxa7 Kc7 6.c4 Ne6 7.Bxf3 Nc5[] 8.Bb7 Nd3[] 9.f3 Nf4[] 10.Be4 Ne6 11.Bd5 Nf4[] 12.Ka8 Nd3[] 13.Bg8 Nc5[] 14.Ka7 Nd3 15.Bd5 Nf4[] 16.Ka8
+- (4.41) Depth: 21 00:00:24 1476kN, tb=612
1.Kd6 Kc4 2.Kc7 Kd5 3.Kb7 Kd6 4.Be4 Kd7 5.Kxa7 Kc7 6.c4 Ne6 7.Bxf3 Nc5[] 8.Bb7 Nd3[] 9.f3 Nf4[] 10.Be4 Ne6 11.Bd5 Nf4[] 12.Ka8 Nd3[] 13.Bg8 Nc5[] 14.Ka7 Nd3 15.Bd5 Nf4[] 16.Ka8
+- (4.41) Depth: 22 00:00:28 1688kN, tb=764
1.Kd6 Kc4 2.Kc7 Kd5 3.Kb7 Kd6 4.Be4 Kd7 5.Kxa7 Kc7[] 6.c4 Ne6 7.Bxf3 Nf4[] 8.Bb7 Ng6[] 9.f3 Nf4[] 10.Bd5 Nd3[] 11.Be6 Nf4[] 12.Bf5 Ne2 13.Ka8 Nd4[] 14.Bg4 Kb6[] 15.a7 Nc6 16.c5+
+- (4.41) Depth: 23 00:00:35 1968kN, tb=968
1.Kd6 Kc4 2.Kc7 Kd5 3.Kb7 Kd6 4.Be4 Kd7 5.Kxa7 Kc7[] 6.c4 Ne6 7.Bxf3 Nf4[] 8.Bb7 Ng6[] 9.f3 Nf4[] 10.Bd5 Nd3[] 11.Be6 Nf4[] 12.Bf5 Ne2 13.Ka8 Nd4[] 14.Bg4 Kb6[] 15.a7 Nc6 16.c5+
+- (4.41) Depth: 24 00:00:42 2221kN, tb=1151
1.Kd6 Kc4 2.Kc7 Kd5 3.Kb7 Kd6 4.Be4 Kd7 5.Kxa7 Kc7[] 6.c4 Ne6 7.Bxf3 Nf4[] 8.Be4 Nh3 9.f3 Ng5 10.Bd5 Nh3[] 11.Be6 Nf4[] 12.Bf5 Ne2 13.Ka8 Nd4[] 14.Bg4 Nc2[] 15.a7 Ne1[] 16.f4
+- (4.43) Depth: 25 00:01:00 3402kN, tb=1885
1.Kd6 Kc4 2.Kc7 Kd5 3.Kb7 Kd6 4.Be4 Kd7 5.Kxa7 Kc7[] 6.c4 Ne6 7.Bxf3 Nf4[] 8.Be4 Nh3 9.f3 Ng5 10.Bd5 Nh3[] 11.Be6 Nf4[] 12.Bf5 Ne2 13.Ka8 Nd4[] 14.Bg4 Nc2[] 15.f4 Nb4[] 16.a7
+- (4.43) Depth: 26 00:01:12 4488kN, tb=2311
1.Kd6 Kc4 2.Kc7 Kd5 3.Kb7 Kd6 4.Be4 Kd7 5.Kxa7 Kc7[] 6.c4 Ne6 7.Bxf3 Nf4[] 8.Be4 Nh3 9.f3 Ng5 10.Bd5 Nh3[] 11.Be6 Nf4[] 12.Bf5 Ne2 13.Ka8 Nd4[] 14.Be4 Ne6[] 15.Bf5 Nd4[] 16.Be4
+- (4.43) Depth: 27 00:01:39 5749kN, tb=3447
1.Kd6 Kc4 2.Bd3+ Kc3 3.Kd5 Nb3 4.Kc6 Nc1[] 5.Be4
+- (4.55 !) Depth: 28 00:02:22 9100kN, tb=7183
1.Kd6 Kc4 2.Bd3+ Kc3 3.Kd5[] Nb3 4.Kc6[]
+- (4.70 !) Depth: 28 00:02:34 11153kN, tb=7899
1.Kd6 Kc4 2.Bd3+[] Kc3 3.Kd5
+- (5.10 !) Depth: 28 00:02:55 15557kN, tb=8800
1.Kd6 Kc4 2.Bd3+[] Kc3 3.Kd5
+- (5.90 !) Depth: 28 00:03:31 22748kN, tb=10991
1.Kd6 Kc4 2.Bd3+[] Kc3 3.Kd5[] Nb3 4.Kc6[] Na5+ 5.Kc7 Kd2 6.Kb8
+- (7.50 !) Depth: 28 00:04:20 32353kN, tb=14077

mhalstern
Posts: 484
Joined: Wed Nov 18, 2009 12:09 am

Re: pawn racing

Post by mhalstern » Mon Jun 21, 2010 8:27 pm

Zappa Mexico II takes a little more than 1 minute:

New game
8/p2K4/P5B1/8/3n4/2k2p2/2P2P2/8 w - - 0 1

Analysis by Zappa Mexico II 64:

1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Nc2 5.Kd6 Nd4 6.Bd7 Kd3 7.f4
+- (1.63) Depth: 13/29 00:00:00 1555kN, tb=218
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Nc2 5.Kd6 Nd4 6.Bd7 Kd3 7.f4
+- (1.63) Depth: 13/29 00:00:00 1642kN, tb=281
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Nc2 5.Kd6 Nd4 6.Bd7 Kd3 7.f4
+- (1.63) Depth: 14/29 00:00:00 1958kN, tb=315
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Nc2 5.Kd6 Nd4 6.Bd7 Kd3 7.f4
+- (1.63) Depth: 14/29 00:00:00 2051kN, tb=397
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Nc2 5.Kc7 Nd4 6.Bd7 Nf3 7.Kb7 Ke1
+- (1.94) Depth: 15/29 00:00:01 3364kN, tb=589
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Nc2 5.Kc7 Nd4 6.Bd7 Nf3 7.Kb7 Ke1
+- (1.94) Depth: 15/29 00:00:01 3675kN, tb=721
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Nd5 5.Kd6 Nf4 6.Ke5 Ng6+ 7.Ke4 Kc3 8.Bd7 Nf8 9.Bf5
+- (2.00) Depth: 16/34 00:00:01 5567kN, tb=1133
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Nd5 5.Kd6 Nf4 6.Ke5 Ng6+ 7.Ke4 Kc3 8.Bd7 Nf8 9.Bf5
+- (2.00) Depth: 16/34 00:00:01 6413kN, tb=1530
1.Be4 Nxc2 2.Bxf3 Kd2 3.Bb7 Ke2 4.f4 Nd4 5.Kd6 Nf5+ 6.Ke5 Nh6 7.f5 Ke3 8.Bc8 Nxf5 9.Bxf5
+- (2.81) Depth: 17/38 00:00:04 17599kN, tb=6167
1.Be4 Nxc2 2.Bxf3 Kd2 3.Bb7 Ke2 4.f4 Nd4 5.Kd6 Nf5+ 6.Ke5 Nh6 7.f5 Ke3 8.Bc8 Nxf5 9.Bxf5
+- (2.81) Depth: 17/38 00:00:04 18915kN, tb=6728
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Kc3 5.Kc8 Kd4 6.Kb7 Kc5 7.Be2 Nc6 8.Bf1 Kd6 9.Bb5 Nd4 10.Ba4 Ne6 11.Kxa7
+- (4.44) Depth: 18/55 00:00:10 45282kN, tb=20455
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Kc3 5.Kc8 Kd4 6.Kb7 Kc5 7.Be2 Nc6 8.Bf1 Kd6 9.Bb5 Nd4 10.Ba4 Ne6 11.Kxa7
+- (4.44) Depth: 18/55 00:00:10 46750kN, tb=20833
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Kc3 5.Kc8 Kd4 6.Kb7 Kc5 7.Bf1 Kd6 8.Kxa7 Kc7 9.f3 Kc6 10.f4 Kd7 11.Bc4 Ke7 12.Kb7 Nc2
+- (4.77) Depth: 19/55 00:00:12 56792kN, tb=28836
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Kc3 5.Kc8 Kd4 6.Kb7 Kc5 7.Bf1 Kd6 8.Kxa7 Kc7 9.f3 Kc6 10.f4 Kd7 11.Bc4 Ke7 12.Kb7 Nc2
+- (4.77) Depth: 19/55 00:00:13 58914kN, tb=29482
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Kc3 5.Kc8 Kd4 6.Kb7 Kc5 7.Bf1 Kd6 8.Kxa7 Kc7 9.f3 Kc6 10.f4 Kd7 11.Bc4 Ke7 12.Kb7 Nc2
+- (4.77) Depth: 20/55 00:00:15 69445kN, tb=37131
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Kc3 5.Kc8 Kd4 6.Kb7 Kc5 7.Bf1 Kd6 8.Kxa7 Kc7 9.f3 Kc6 10.f4 Kd7 11.Bc4 Ke7 12.Kb7 Nc2
+- (4.77) Depth: 20/55 00:00:16 73722kN, tb=40094
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Kc3 5.Kc8 Kd4 6.Kb7 Kc5 7.Bf1 Kd6 8.Kxa7 Kc7 9.Bc4 Nc6+ 10.Ka8 Na7 11.Kxa7 Kd6
+- (4.89) Depth: 21/55 00:00:23 107mN, tb=67293
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Kc3 5.Kc8 Kd4 6.Kb7 Kc5 7.Bf1 Kd6 8.Kxa7 Kc7 9.Bc4 Nc6+ 10.Ka8 Na7 11.Kxa7 Kd6
+- (4.89) Depth: 21/55 00:00:26 126mN, tb=81080
1.Be4 Nxc2 2.Bxf3 Nb4 3.Be2 Kd2 4.Bb5 Kc3 5.Kc8 Kd4 6.Kb7 Kc5 7.Bf1 Kd6 8.Kxa7 Kc7 9.Bc4 Nc6+
+- (4.89) Depth: 22/55 00:00:37 184mN, tb=120156
1.Kd6 Kb4 2.Bd3 Ne2 3.Kc6 Nd4+ 4.Kb7 Kc5 5.c3 Ne2 6.Kxa7 Nxc3 7.Kb8 Kd4 8.Bc2 Nb5 9.Ba4 Nc3 10.a7 Kd3 11.Bc6
+- (6.98) Depth: 22/55 00:00:59 325mN, tb=177023
1.Kd6 Kb4 2.Bd3 Ne2 3.Kc6 Nd4+ 4.Kb7 Kc5 5.c3 Ne2 6.Kxa7 Nxc3 7.Kb8 Kd4 8.Bc2 Nb5 9.Ba4 Nc3 10.a7 Kd3 11.Bc6
+- (6.98) Depth: 22/55 00:01:00 336mN, tb=186807
1.Kd6 Kb4 2.Bd3 Kc3 3.Kd5 Ne2 4.Kc6 Nf4 5.Be4 Kd4 6.Bxf3 Ke5 7.Kb7 Kd6 8.Kxa7 Kc7 9.Ka8 Ng6 10.Bd5 Nf8 11.f4 Ng6 12.f5 Ne5 13.Ka7 Nd7
+- (7.19) Depth: 23/65 00:01:13 422mN, tb=202056
1.Kd6 Kb4 2.Bd3 Kc3 3.Bg6
+- (7.19) Depth: 23/65 00:01:19 459mN, tb=228505
1.Kd6 Kb4 2.Bd3 Kc3 3.Kd5 Ne2 4.Kc6 Nf4 5.Bh7 Nh3 6.Be4 Ng5 7.Bxf3 Nxf3 8.Kb7 Ne5 9.Kxa7 Kd2 10.Kb7 Nc4
+- (10.84) Depth: 24/67 00:02:06 770mN, tb=376024
1.Kd6 Kb4 2.Bd3 Kc3 3.Kd5 Ne2 4.Kc6 Nf4 5.Bh7 Nh3 6.Be4 Ng5 7.Bxf3 Nxf3 8.Kb7 Ne5 9.Kxa7 Kd2 10.Ka8 Ke2
+- (10.84) Depth: 24/67 00:02:14 826mN, tb=407380
1.Kd6 Kb4 2.Bd3 Kc3 3.Kd5 Ne2 4.Kc6 Nf4 5.Bh7 Nh3 6.Be4 Kd2 7.Kb7 Ng5 8.Bf5 Ke1 9.Kxa7 Kxf2 10.Bd3 Nh3 11.Kb6 Nf4 12.a7 Nd5+ 13.Kb7 Ne3 14.a8Q Kg1 15.Qa1+ Nf1 16.Bxf1
+- (12.03) Depth: 25/69 00:03:33 1349mN, tb=587830

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