Test Position

Discussion of anything and everything relating to chess playing software and machines.

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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Test Position

Post by zullil »

[D]5rk1/1r3p2/1qb1pPpR/3pP1N1/p1pP4/PpP5/1Pn1B2P/3RB2K w - - 1 10

Can your favorite engine find the winner here? If not, ask Lyudmil for help.

SF finds it---at depth 46!
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Howard E
Posts: 261
Joined: Wed Mar 08, 2006 8:49 pm

Re: Test Position

Post by Howard E »

I'm guessing Bd3 .... as capturing the bishop gets the rook in play ...

just human intuition ... which is most often very unreliable. Anyway that is what I would play in a speed chess game.
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Howard E
Posts: 261
Joined: Wed Mar 08, 2006 8:49 pm

Re: Test Position

Post by Howard E »

And I see I would be wrong ...

Bf2 maybe?
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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 »

Howard E wrote:And I see I would be wrong ...

Bf2 maybe?
Yes.
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Test Position

Post by kgburcham »

[D] 5rk1/1r3p2/1qb1pPpR/3pP1N1/p1pP4/PpP5/1Pn1B2P/3RB2K w - -

Houdini
19/79 1:12 -0.05 1.Bf2 Nb4 2.axb4 a3 3.Bh5 Qa7 4.bxa3 b2 5.Rg1 Ba4 6.Nxf7 Rfxf7 7.Bxg6 Rg7 (1.605.231.582) 22204 TB:2
20/79 1:14 0.00 1.Bf2 Nb4 2.axb4 a3 3.Bh5 Qa7 4.bxa3 b2 5.Rg1 Ba4 6.Nxf7 Rfxf7 7.Bxg6 Rg7 (1.666.528.190) 22221 TB:2
21/79 1:18 0.00 1.Bf2 Nb4 2.axb4 a3 3.Bh5 Qa7 4.bxa3 b2 5.Rg1 Ba4 6.Nxf7 Rfxf7 7.Bxg6 Rg7 (1.755.076.696) 22244 TB:2
22/79 1:25 0.00 1.Bf2 Nb4 2.axb4 a3 3.Bh5 Qa7 4.bxa3 b2 5.Rg1 Ba4 6.Nxf7 Rfxf7 7.Bxg6 Rg7 (1.899.092.804) 22314 TB:2
23/79 1:37 0.00 1.Bf2 Nb4 2.axb4 a3 3.Bh5 Qa7 4.bxa3 b2 5.Rg1 Ba4 6.Nxf7 Rfxf7 7.Bxg6 Rg7 (2.176.104.745) 22427 TB:2
24/79 1:56 0.00 1.Bf2 Nb4 2.axb4 a3 3.Bh5 Qa7 4.bxa3 b2 5.Rg1 Ba4 6.Nxf7 Rfxf7 7.Bxg6 Rg7 (2.634.495.763) 22617 TB:2
25/79 3:02 +0.07++ 1.Bf2 (4.226.085.279) 23106 TB:2
25/79 3:40 +0.21++ 1.Bf2 (5.117.645.962) 23208 TB:2
25/79 4:03 +0.21 1.Bf2 Nb4 2.axb4 a3 3.Bh5 Qa7 4.bxa3 b2 5.Rg1 Ba4 6.Nxf7 Rfxf7 7.Bxg6 Rg7 (5.682.463.398) 23301 TB:2





Engine: Komodo
19.00 0:01 -1.34 1.Bd2 Ra8 2.Rh7 Qa5 3.Bg4 Rba7 4.Rg7+ Kf8 5.Rh7 Ke8 6.Rh8+ Kd7 7.Rh7 Kc8 (37.938.308) 19118
19.00 0:02 -1.11++ 1.Rh7 (47.915.825) 19166
19.00 0:02 -1.05 1.Rh7 Rfb8 2.Rg7+ Kf8 3.Bd2 Qa7 4.Bg4 Qa5 5.Rh7 Ke8 6.Rh8+ Kd7 7.Rh7 Kc7 (48.294.342) 19197
20.00 0:02 -1.05 1.Rh7 Rfb8 2.Rg7+ Kf8 3.Bd2 Qa7 4.Bg4 Qa5 5.Rh7 Ke8 6.Rh8+ Kd7 7.Rh7 Kc7 (52.234.453) 19102
21.00 0:04 -0.78++ 1.Rh7 (80.021.557) 19472
21.01 0:05 -0.51++ 1.Rh7 (107.532.362) 19662
21.01 0:06 0.00 1.Rh7 Rc8 2.Bd2 Qa5 3.Rg7+ Kf8 4.Bg4 Rcb8 5.Nh7+ Ke8 6.Ng5 Kf8 (123.061.126) 19640
22.01 0:06 0.00 1.Rh7 Rc8 2.Bd2 Qa5 3.Rg7+ Kf8 4.Bg4 Rcb8 5.Nh7+ Ke8 6.Ng5 Kf8 (131.390.310) 19692
23.01 0:08 0.00 1.Rh7 Rc8 2.Bd2 Qa5 3.Rg7+ Kf8 4.Bg4 Ra8 5.Bxe6 fxe6 6.Rf1 Rxg7 7.Nxe6+ Kf7 (180.460.154) 20660
24.01 0:09 0.00 1.Rh7 Rc8 2.Bd2 Qa5 3.Rg7+ Kf8 4.Bg4 Ra8 5.Bxe6 fxe6 6.Rf1 Rxg7 7.Nxe6+ Kf7 (189.904.291) 20669
25.01 0:10 0.00 1.Rh7 Rc8 2.Bd2 Qa5 3.Rg7+ Kf8 4.Bg4 Ra8 5.Bxe6 fxe6 6.Rf1 Rxg7 7.Nxe6+ Kf7 (209.063.003) 20647
26.01 0:13 0.00 1.Rh7 Rc8 2.Bd2 Qa5 3.Rg7+ Kf8 4.Bg4 Ra8 5.Bxe6 fxe6 6.Rf1 Rxg7 7.Nxe6+ Kf7 (269.606.476) 20590
27.01 0:20 0.00 1.Rh7 Rc8 2.Bd2 Qa5 3.Rg7+ Kf8 4.Bg4 Ra8 5.Bxe6 fxe6 6.Rf1 Rxg7 7.Nxe6+ Kf7 (426.492.264) 20538
28.01 0:36 0.00 1.Rh7 Rc8 2.Bd2 Nxd4 3.cxd4 Qxd4 4.Rg7+ Kh8 5.Rh7+ Kg8 (748.010.705) 20598
29.01 0:39 0.00 1.Rh7 Rc8 2.Bd2 Nxd4 3.cxd4 Qxd4 4.Rg7+ Kh8 5.Rh7+ Kg8 (815.776.538) 20652
30.01 0:48 0.00 1.Rh7 Rc8 2.Bd2 Nxd4 3.cxd4 Qxd4 4.Rg7+ Kh8 5.Rh7+ Kg8 (1.012.533.868) 20670
31.01 0:56 0.00 1.Rh7 Rc8 2.Bd2 Nxd4 3.cxd4 Qxd4 4.Rg7+ Kh8 5.Rh7+ Kg8 (1.173.985.784) 20675
32.01 1:31 0.00 1.Rh7 Ne3 2.Rg7+ Kh8 3.Rh7+ Kg8 (1.895.704.829) 20767
32.09 3:17 +0.12++ 1.Bf2 (4.107.197.826) 20836
32.01 3:22 +0.24++ 1.Bf2 (4.217.702.657) 20851
32.01 3:33 +0.48++ 1.Bf2 (4.454.673.780) 20890
32.01 3:51 +0.84++ 1.Bf2 (4.847.049.492) 20947
32.01 4:52 +1.37++ 1.Bf2 (6.171.250.539) 21069
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Test Position

Post by kgburcham »

[D] 5rk1/1r3p2/1qb1pPpR/3pP1N1/p1pP4/PpP5/1Pn1B2P/3RB2K w - -

Stockfish

37/46 0:14 -1.00 1.Rh7 Rc8 2.Bd2 Nxd4 3.cxd4 Qxd4 4.Rg7+ Kh8 5.Rh7+ Kg8 (212.055.805) 14194
38/46 0:16 -1.00 1.Rh7 Rc8 2.Bd2 Nxd4 3.cxd4 Qxd4 4.Rg7+ Kh8 5.Rh7+ Kg8 (236.408.284) 14339
39/46 0:18 -1.00 1.Rh7 Rc8 2.Bd2 Nxd4 3.cxd4 Qxd4 4.Rg7+ Kh8 5.Rh7+ Kg8 (265.751.478) 14461
40/46 0:21 -1.00 1.Rh7 Rc8 2.Bd2 Nxd4 3.cxd4 Qxd4 4.Rg7+ Kh8 5.Rh7+ Kg8 (315.585.778) 14677
41/48 1:16 -1.00 1.Rh7 Ne3 2.Rg7+ Kh8 3.Rh7+ Kg8 (1.236.866.509) 16203
42/48 1:59 -0.93++ 1.Bf2 (1.977.017.144) 16604
42/48 2:03 -0.87++ 1.Bf2 (2.052.955.886) 16647
42/53 2:13 -0.78++ 1.Bf2 (2.229.308.678) 16704
42/53 2:20 -0.64++ 1.Bf2 (2.357.834.681) 16729
42/53 2:27 -0.43++ 1.Bf2 (2.477.752.244) 16776
42/53 2:36 -0.12++ 1.Bf2 (2.631.607.688) 16838
42/53 2:41 +0.34++ 1.Bf2 (2.732.305.345) 16877
42/53 2:52 +1.05++ 1.Bf2 (2.923.480.487) 16932
42/53 3:10 +2.10++ 1.Bf2 (3.233.728.300) 17006
42/53 3:34 +3.67++ 1.Bf2 (3.663.727.000) 17117
42/56 4:19 +6.03++ 1.Bf2 (4.465.563.372) 17236
42/77 6:52 +9.57++ 1.Bf2 (7.207.725.076) 17468
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yanquis1972
Posts: 1766
Joined: Wed Jun 03, 2009 12:14 am

Re: Test Position

Post by yanquis1972 »

i would argue a decisive eval is also necessary for an engine to properly get this, so i dont count houdinis find in the above instance.
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Carotino
Posts: 216
Joined: Fri Jun 11, 2010 10:40 am
Location: Italy

Re: Test Position

Post by Carotino »

zullil wrote:
Howard E wrote:And I see I would be wrong ...

Bf2 maybe?
Yes.
No: 10. Bd3? cxd3 11. Rxd3 Qa6! and white is dead.

For me: 10.Bf2 and 11.Rg1, and black is dead.
Roberto
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Ignacio
Posts: 177
Joined: Wed Mar 08, 2006 8:15 pm

Re: Test Position

Post by Ignacio »

FEN: 5rk1/1r3p2/1qb1pPpR/3pP1N1/p1pP4/PpP5/1Pn1B2P/3RB2K w - - 0 1

Spark-0.4-win64-mp-corei:

20/44 00:27 342.762.790 12.428.398 -1,60 Ae1-f2
20/44 00:32 400.467.902 12.447.715 -0,85 Ae1-f2
20/44 00:45 571.900.004 12.517.510 0,00 Ae1-f2 Cc2-b4 c3xb4 Ac6-b5 Ae2-h5 Ab5-e8 Th6-h7 Db6-a7 Th7-g7+ Rg8-h8 Tg7-h7+ Rh8-g8
21/44 00:49 611.797.286 12.418.245 0,00 Ae1-f2 Cc2-b4 c3xb4 Ac6-b5 Ae2-h5 c4-c3 Ah5xg6 f7xg6 Th6xg6+ Rg8-h8 Tg6-h6+ Rh8-g8 Th6-g6+
22/44 00:53 668.475.585 12.411.355 0,00 Ae1-f2 Cc2-b4 c3xb4 Ac6-b5 Ae2-h5 c4-c3 Ah5xg6 f7xg6 Th6xg6+ Rg8-h8 Tg6-h6+ Rh8-g8 Th6-g6+
23/46 01:01 765.492.373 12.437.525 +0,25 Ae1-f2
23/46 01:04 800.535.970 12.447.498 +0,75 Ae1-f2
23/46 02:23 1.770.196.799 12.374.931 +5,50 Ae1-f2
23/48 03:41 2.852.042.812 12.879.644 +9,42 Ae1-f2 Db6-a5 Td1-g1 Cc2xd4 Af2xd4 Da5xc3 b2xc3 b3-b2 Tg1-b1 Tf8-b8 Th6-h7 Ac6-e8 Ad4-c5 d5-d4 Th7-g7+ Rg8-h8 Ac5xd4 Tb7-b3 Cg5xf7+ Ae8xf7 Tg7xf7 Tb3xa3 Ae2xc4 Ta3-a1 Ac4-d3 Tb8-g8 Tf7-a7 a4-a3 Rh1-g2 Ta1xb1 Ad3xb1
24/52 03:52 2.983.617.982 12.847.408 +9,42 Ae1-f2 Db6-a5 Td1-g1 Cc2xd4 Af2xd4 Da5xc3 b2xc3 b3-b2 Tg1-b1 Tf8-b8 Th6-h7 Ac6-e8 Ad4-c5 d5-d4 Th7-g7+ Rg8-h8 Ac5xd4 Tb7-b3 Cg5xf7+ Ae8xf7 Tg7xf7 Tb3xa3 Ae2xc4 Ta3-a1 Ac4-d3 Tb8-g8 Tf7-a7 a4-a3 Rh1-g2 Ta1xb1 Ad3xb1
25/54 04:18 3.328.943.095 12.890.389 +9,67 Ae1-f2
25/54 04:22 3.372.640.741 12.851.974 +10,07 Ae1-f2 Db6-a5 Td1-g1 Cc2xd4 Af2xd4 Da5xc3 b2xc3 b3-b2 Tg1-b1 Tf8-b8 Th6-h7 Ac6-e8 Ad4-c5 d5-d4 Th7-g7+ Rg8-h8 Ac5xd4 Tb7-c7 Tg7-h7+ Rh8-g8 Ae2-f3 Tb8-b5 Th7-g7+ Rg8-h8 Cg5xe6 Tc7-c8 Ce6-g5 Tc8-c7 Tg7-h7+ Rh8-g8 h2-h4 Ae8-c6 Af3xc6 Tc7xc6 Th7-g7+ Rg8-f8 Tg7xf7+ Rf8-g8
26/56 04:41 3.582.999.334 12.719.744 +10,09 Ae1-f2 Db6-a5 Td1-g1 Cc2xd4 Af2xd4 Da5xc3 b2xc3 b3-b2 Tg1-b1 Tf8-b8 Th6-h7 Ac6-e8 Ad4-c5 d5-d4 Th7-g7+ Rg8-h8 Ac5xd4 Tb7-d7 Ae2xc4 Tb8-b7 Ac4-a6 Tb7-b8 Rh1-g2 Td7-c7 Cg5xe6 Tc7-c6 Ce6-c5 Tb8-b6 Aa6-c4 Tc6-c7
27/56 05:03 3.803.488.188 12.539.812 +10,34 Ae1-f2
27/56 05:36 4.177.228.573 12.431.635 +10,62 Ae1-f2 Db6-a5 Td1-g1 Cc2xd4 Af2xd4 Da5xc3 b2xc3 b3-b2 Tg1-b1 Tf8-b8 Th6-h7 Ac6-e8 Ad4-c5 d5-d4 Th7-g7+ Rg8-h8 Ac5xd4 Tb7-d7 Ae2xc4 Tb8-b7 Ac4-a6 Tb7-b8 Rh1-g2 Td7-c7 Cg5xe6 Tc7-c6 Ce6-c5 Tb8-b6 Aa6-c4 Tc6-c7 Cc5xa4 Ae8xa4 Ad4xb6 Tc7xc4 Tg7xf7
28/62 06:41 4.918.194.839 12.259.077 +10,71 Ae1-f2 Db6-a5 Td1-g1 Cc2xd4 Af2xd4 Da5xc3 b2xc3 b3-b2 Tg1-b1 Tf8-b8 Th6-h7 Ac6-e8 Ad4-c5 d5-d4 Th7-g7+ Rg8-h8 Ac5xd4 Tb7-d7 Ae2xc4 Tb8-b7 Ac4-a6 Tb7-b8 Rh1-g2 Td7-c7 Cg5xe6 Tc7-c6 Ce6-c5 Tb8-b6 Aa6-d3 Tc6-c8 e5-e6 f7xe6
29/62 07:41 5.501.819.373 11.926.021 +10,96 Ae1-f2
29/62 08:43 6.103.094.501 11.655.802 +11,46 Ae1-f2
29/62 19:11 12.890.544.754 11.196.385 +16,21 Ae1-f2
29/68 22:51 15.274.311.133 11.136.938 +16,99 Ae1-f2 Db6-a5 Td1-g1 Cc2xd4 Af2xd4 Da5xc3 b2xc3 b3-b2 Tg1-b1 Tf8-b8 Ae2-h5 Ac6-e8 Ad4-c5 d5-d4 Ah5-f3 Ae8-b5 Af3xb7 d4xc3 Ab7-e4 Ab5-c6 Th6-h7 Tb8-b7 Th7-g7+ Rg8-h8 Tg7xf7 Tb7xf7 Cg5xf7+ Rh8-g8 Cf7-g5 Ac6-e8 Ac5-b4 c3-c2 Ae4xc2 c4-c3 Ab4xc3 Ae8-c6+ Rh1-g1
30/68 25:29 16.923.301.322 11.067.759 +17,24 Ae1-f2
30/68 28:14 18.565.173.262 10.958.050 +17,74 Ae1-f2
30/76 1:05:57 44.873.737.882 11.338.729 +28,49 Ae1-f2
30/76 1:24:08 57.190.556.251 11.329.349 +M21 Ae1-f2 Db6-a5 Td1-g1 Cc2-e3 Af2xe3 Da5xc3 b2xc3 b3-b2 Tg1-b1 Tb7-b3 Th6-h7 Tb3xa3 Tb1xb2 Ta3-b3 Th7-g7+ Rg8-h8 Cg5xf7+ Tf8xf7 Tg7xf7 Tb3xb2 Tf7-f8+ Rh8-h7 f6-f7 Tb2-b7 Tf8-h8+ Rh7xh8 f7-f8D+ Rh8-h7 Ae3-g5 Tb7-b1+ Rh1-g2 Tb1-b7 Ag5-f6 g6-g5 Ae2-g4 Tb7-b2+ Rg2-f3 Tb2-f2+ Rf3xf2 Rh7-g6 Df8-g7+
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BBauer
Posts: 658
Joined: Wed Mar 08, 2006 8:58 pm

Re: Similar Test Position

Post by BBauer »

[D]rnb2rk1/2q1bp1p/p2ppPp1/6P1/np1NP3/3BB3/PPP4P/R2Q1RK1 w - - 0 1 [D]
Here Ludmil would perhaps say after a 10 sec look:
Mate in 4: Qe1, Qh4, Qh6 and Qg7#.
My stockfish took over 8 min.
Kind regards
Bernhard
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