Took 8 mins to do what? Choose Qe1? How is this mate-in-4 (assuming Black is allowed to move)? Can't Black play h5?BBauer wrote:[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
Test Position
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zullil
- Posts: 6442
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- Full name: Louis Zulli
Re: Similar Test Position
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BBauer
- Posts: 658
- Joined: Wed Mar 08, 2006 8:58 pm
Re: Similar Test Position
Took 8 min to play Qe1.Took 8 mins to do what? Choose Qe1? How is this mate-in-4 (assuming Black is allowed to move)? Can't Black play h5?
May be white is winning after Qe1.
This is #4 for a human mind visualization. Black may try to hinder, but white gets advantage.
Yeah black can play h5, but then white has to remove the pawn.
Now I have said allready too much.
Kind regards
Bernhardd
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Eelco de Groot
- Posts: 4567
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- Full name:
Re: Test Position
Hello Louis,
Rainbow Serpent finds it at a depth of 41 plies. In nodes then the Stockfish of Kim was about a billion nodes faster. The evaluation of Rh7 seems very different than that of Stockfish, because it is just a draw here.
5rk1/1r3p2/1qb1pPpR/3pP1N1/p1pP4/PpP5/1Pn1B2P/3RB2K w - -
Engine: Sf20141112_007 MOD MP (Q6700, 4 threads, 512 MB)
by Tord Romstad, Marco Costalba and Joona Kiiski
20/28 0:02 -2.70 1.Bg4 Rfb8 2.Bh4 Ne3 3.Bxe6 fxe6
4.Rxg6+ Kf8 5.Rg1 Bb5 6.Rh6 Ke8
7.f7+ Kd7 8.Nh7 Nf5 9.f8Q Rxf8
10.Nxf8+ Kc8 11.Rxe6 Bc6 12.Bf6 (4.911.076) 2455
21/28 0:03 -2.35++ 1.Rh7 (7.884.584) 2487
21/28 0:03 -2.14++ 1.Rh7 (8.568.798) 2496
21/28 0:03 -2.09 1.Rh7 Rfb8 2.Bd2 Qa5 3.Bg4 Bb5 (9.318.810) 2503
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29/37 0:28 -0.65++ 1.Rh7 (82.345.663) 2850
29/37 0:34 -0.18++ 1.Rh7 (97.661.131) 2871
29/37 0:36 0.00 1.Rh7 Rfb8 2.Bd2 Qa5 3.Rg7+ Kf8
4.Bg4 Bb5 5.Bxe6 fxe6 6.Nh7+ Ke8
7.Rf1 Rf7 8.Rg8+ Kd7 9.Rxb8 Nxd4
10.Rb7+ Ke8 11.Rb8+ Kd7 (104.066.462) 2883
30/39 0:37 -0.11-- 1.Rh7 Rfb8 (109.539.205) 2886
30/40 0:42 -0.02++ 1.Rh7 (123.346.386) 2895
30/40 0:46 0.00 1.Rh7 Rfb8 2.Bd2 Qa5 3.Bh5 Nxa3
4.Rf1 Nc2 5.Bxg6 fxg6 6.f7+ Rxf7
7.Rfxf7 Rb7 8.Rhg7+ Kh8 9.Rh7+ Kg8 (135.787.008) 2901
31/40 1:02 0.00 1.Rh7 Rfb8 2.Bd2 Qa5 3.Bh5 Qa7
4.Rg7+ Kf8 5.Rh7 Kg8 (182.609.738) 2943
32/40 1:08 0.00 1.Rh7 Rfb8 2.Bd2 Qa5 3.Bh5 Qa7
4.Rg7+ Kf8 5.Rh7 Kg8 (201.176.061) 2941
33/40 1:30 0.00 1.Rh7 Rfb8 2.Bd2 Qa7 3.Bg4 Nxd4
4.cxd4 Qxd4 5.Rg7+ Kh8 6.Rh7+ Kg8 (266.835.412) 2960
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40/42 8:52 0.00 1.Rh7 Rfb8 2.Bd2 Nxd4 3.cxd4 Qxd4
4.Rg7+ Kh8 5.Rh7+ Kg8 (1.503.184.364) 2822
41/42 16:57 +0.06++ 1.Bf2 (2.975.746.106) 2925
41/42 17:45 +0.12++ 1.Bf2 (3.123.584.070) 2931
41/42 18:29 +0.21++ 1.Bf2 (3.256.864.321) 2936
41/42 19:12 +0.35++ 1.Bf2 (3.389.564.188) 2939
41/42 19:58 +0.56++ 1.Bf2 (3.528.898.913) 2943
41/42 20:45 +0.87++ 1.Bf2 (3.671.781.082) 2947
41/42 22:02 +1.34++ 1.Bf2 (3.907.941.272) 2955
41/42 23:23 +2.05++ 1.Bf2 (4.155.727.668) 2961
41/42 25:55 +3.10++ 1.Bf2 (4.622.819.558) 2972
41/42 29:02 +4.67++ 1.Bf2 (5.202.710.362) 2986
41/44 34:18 +7.03++ 1.Bf2 (6.193.907.332) 3009
41/52 43:43 +10.36 1.Bf2 Qa5 2.Rg1 Ne3 3.Bxe3 Qxc3
4.bxc3 b2 5.Rb1 Ra8 6.Rh7 Be8 7.Rg7+ Kh8
8.Bg4 Rab8 9.Bd1 Ra7 10.Nxe6 Rb3
11.Bxb3 axb3 12.Ng5 Rxa3 13.e6 fxe6
14.f7 (8.010.188.261) 3053
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43/59 95:14 +17.42 1.Bf2 Qa5 2.Rg1 Nxd4 3.Bxd4 Qxc3
4.bxc3 b2 5.Rb1 Ra8 6.Rh7 Be8 7.Rg7+ Kh8
8.Nxe6 Bd7 9.Ng5 Be6 10.Nxe6 Rg8
11.Nc5 Rb5 12.Rxf7 Rc8 13.Nxa4 Rc6
14.Rxb2 (18.002.738.926) 3150
44/59 95:22 +17.25-- 1.Bf2 Qa5 (18.026.937.053) 3150
44/59 95:24 +17.19-- 1.Bf2 Qa5 (18.034.064.696) 3150
44/59 95:28 +17.10-- 1.Bf2 Qa5 (18.044.782.531) 3149
44/59 95:31 +16.96-- 1.Bf2 Qa5 (18.052.339.570) 3149
44/59 95:32 +16.75-- 1.Bf2 Qa5 (18.054.825.041) 3149
44/59 95:33 +16.43-- 1.Bf2 Qa5 (18.058.900.801) 3149
44/59 95:58 +15.96-- 1.Bf2 Qa5 (18.141.358.630) 3150
44/59 96:03 +15.26-- 1.Bf2 Qa5 (18.150.630.607) 3149
44/59 97:19 +15.79++ 1.Bf2 (18.390.587.899) 3149
best move: Be1-f2 time: 97:38.805 min n/s: 3.149.451 nodes: 18.451.331.314
Still a lot of FHs and FLs here at the end, immediately after completing the previous depth 43
Rainbow Serpent finds it at a depth of 41 plies. In nodes then the Stockfish of Kim was about a billion nodes faster. The evaluation of Rh7 seems very different than that of Stockfish, because it is just a draw here.
5rk1/1r3p2/1qb1pPpR/3pP1N1/p1pP4/PpP5/1Pn1B2P/3RB2K w - -
Engine: Sf20141112_007 MOD MP (Q6700, 4 threads, 512 MB)
by Tord Romstad, Marco Costalba and Joona Kiiski
20/28 0:02 -2.70 1.Bg4 Rfb8 2.Bh4 Ne3 3.Bxe6 fxe6
4.Rxg6+ Kf8 5.Rg1 Bb5 6.Rh6 Ke8
7.f7+ Kd7 8.Nh7 Nf5 9.f8Q Rxf8
10.Nxf8+ Kc8 11.Rxe6 Bc6 12.Bf6 (4.911.076) 2455
21/28 0:03 -2.35++ 1.Rh7 (7.884.584) 2487
21/28 0:03 -2.14++ 1.Rh7 (8.568.798) 2496
21/28 0:03 -2.09 1.Rh7 Rfb8 2.Bd2 Qa5 3.Bg4 Bb5 (9.318.810) 2503
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29/37 0:28 -0.65++ 1.Rh7 (82.345.663) 2850
29/37 0:34 -0.18++ 1.Rh7 (97.661.131) 2871
29/37 0:36 0.00 1.Rh7 Rfb8 2.Bd2 Qa5 3.Rg7+ Kf8
4.Bg4 Bb5 5.Bxe6 fxe6 6.Nh7+ Ke8
7.Rf1 Rf7 8.Rg8+ Kd7 9.Rxb8 Nxd4
10.Rb7+ Ke8 11.Rb8+ Kd7 (104.066.462) 2883
30/39 0:37 -0.11-- 1.Rh7 Rfb8 (109.539.205) 2886
30/40 0:42 -0.02++ 1.Rh7 (123.346.386) 2895
30/40 0:46 0.00 1.Rh7 Rfb8 2.Bd2 Qa5 3.Bh5 Nxa3
4.Rf1 Nc2 5.Bxg6 fxg6 6.f7+ Rxf7
7.Rfxf7 Rb7 8.Rhg7+ Kh8 9.Rh7+ Kg8 (135.787.008) 2901
31/40 1:02 0.00 1.Rh7 Rfb8 2.Bd2 Qa5 3.Bh5 Qa7
4.Rg7+ Kf8 5.Rh7 Kg8 (182.609.738) 2943
32/40 1:08 0.00 1.Rh7 Rfb8 2.Bd2 Qa5 3.Bh5 Qa7
4.Rg7+ Kf8 5.Rh7 Kg8 (201.176.061) 2941
33/40 1:30 0.00 1.Rh7 Rfb8 2.Bd2 Qa7 3.Bg4 Nxd4
4.cxd4 Qxd4 5.Rg7+ Kh8 6.Rh7+ Kg8 (266.835.412) 2960
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40/42 8:52 0.00 1.Rh7 Rfb8 2.Bd2 Nxd4 3.cxd4 Qxd4
4.Rg7+ Kh8 5.Rh7+ Kg8 (1.503.184.364) 2822
41/42 16:57 +0.06++ 1.Bf2 (2.975.746.106) 2925
41/42 17:45 +0.12++ 1.Bf2 (3.123.584.070) 2931
41/42 18:29 +0.21++ 1.Bf2 (3.256.864.321) 2936
41/42 19:12 +0.35++ 1.Bf2 (3.389.564.188) 2939
41/42 19:58 +0.56++ 1.Bf2 (3.528.898.913) 2943
41/42 20:45 +0.87++ 1.Bf2 (3.671.781.082) 2947
41/42 22:02 +1.34++ 1.Bf2 (3.907.941.272) 2955
41/42 23:23 +2.05++ 1.Bf2 (4.155.727.668) 2961
41/42 25:55 +3.10++ 1.Bf2 (4.622.819.558) 2972
41/42 29:02 +4.67++ 1.Bf2 (5.202.710.362) 2986
41/44 34:18 +7.03++ 1.Bf2 (6.193.907.332) 3009
41/52 43:43 +10.36 1.Bf2 Qa5 2.Rg1 Ne3 3.Bxe3 Qxc3
4.bxc3 b2 5.Rb1 Ra8 6.Rh7 Be8 7.Rg7+ Kh8
8.Bg4 Rab8 9.Bd1 Ra7 10.Nxe6 Rb3
11.Bxb3 axb3 12.Ng5 Rxa3 13.e6 fxe6
14.f7 (8.010.188.261) 3053
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43/59 95:14 +17.42 1.Bf2 Qa5 2.Rg1 Nxd4 3.Bxd4 Qxc3
4.bxc3 b2 5.Rb1 Ra8 6.Rh7 Be8 7.Rg7+ Kh8
8.Nxe6 Bd7 9.Ng5 Be6 10.Nxe6 Rg8
11.Nc5 Rb5 12.Rxf7 Rc8 13.Nxa4 Rc6
14.Rxb2 (18.002.738.926) 3150
44/59 95:22 +17.25-- 1.Bf2 Qa5 (18.026.937.053) 3150
44/59 95:24 +17.19-- 1.Bf2 Qa5 (18.034.064.696) 3150
44/59 95:28 +17.10-- 1.Bf2 Qa5 (18.044.782.531) 3149
44/59 95:31 +16.96-- 1.Bf2 Qa5 (18.052.339.570) 3149
44/59 95:32 +16.75-- 1.Bf2 Qa5 (18.054.825.041) 3149
44/59 95:33 +16.43-- 1.Bf2 Qa5 (18.058.900.801) 3149
44/59 95:58 +15.96-- 1.Bf2 Qa5 (18.141.358.630) 3150
44/59 96:03 +15.26-- 1.Bf2 Qa5 (18.150.630.607) 3149
44/59 97:19 +15.79++ 1.Bf2 (18.390.587.899) 3149
best move: Be1-f2 time: 97:38.805 min n/s: 3.149.451 nodes: 18.451.331.314
Still a lot of FHs and FLs here at the end, immediately after completing the previous depth 43
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
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
-
zullil
- Posts: 6442
- Joined: Tue Jan 09, 2007 12:31 am
- Location: PA USA
- Full name: Louis Zulli
Re: Test Position
Forgot to stop a search, so after hours of searching SF sayszullil wrote:[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!
Code: Select all
info depth 60 seldepth 123 multipv 1 score mate 25 nodes 403932872830 nps 17003066 time 23756472 pv e1f2 b6a5 d1g1 c2d4 f2d4 a5c3 b2c3 b3b2 g1b1 f8b8 h6h7 c6e8 d4c5 d5d4 c3d4 c4c3 h7g7 g8h8 e2d3 e8c6 h1g1 c6f3 g5f7 b7f7 g7f7 b8g8 d3c2 f3e2 f7c7 e2g4 b1f1 g4f5 f1f4 b2b1q c2b1 g6g5 f4f5 c3c2 b1c2 e6f5 c2f5 g8f8 c5f8 g5g4 f8g7 h8g8 e5e6 g4g3 c7c8