hardest LCTII test position

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jarkkop
Posts: 198
Joined: Thu Mar 09, 2006 2:44 am
Location: Helsinki, Finland

hardest LCTII test position

Post by jarkkop »

LCTCMB12 (e5!)
[d]r2qrb1k/1p1b2p1/p2ppn1p/8/3NP3/1BN5/PPP3QP/1K3RR1 w - - 0 1

How long to solve this?
I have not seen any solution in reasobale time.
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Jouni
Posts: 3646
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: hardest LCTII test position

Post by Jouni »

Rybka forum has a lot of solutions. Fastest is:

1.e5 dxe5 2.Ne4 Nh5 3.Qg4 Nf4 4.Nf3 Qc7
± (1.34) Depth: 8 00:00:04 :)

Jouni
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Dann Corbit
Posts: 12791
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: hardest LCTII test position

Post by Dann Corbit »

Jouni wrote:Rybka forum has a lot of solutions. Fastest is:

1.e5 dxe5 2.Ne4 Nh5 3.Qg4 Nf4 4.Nf3 Qc7
± (1.34) Depth: 8 00:00:04 :)

Jouni
See:
http://rybkaforum.net/cgi-bin/rybkaforu ... P%201K3RR1
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Dann Corbit
Posts: 12791
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: hardest LCTII test position

Post by Dann Corbit »

jarkkop wrote:LCTCMB12 (e5!)
[d]r2qrb1k/1p1b2p1/p2ppn1p/8/3NP3/1BN5/PPP3QP/1K3RR1 w - - 0 1

How long to solve this?
I have not seen any solution in reasobale time.
Stockfish solves it in less than ten minutes

Code: Select all

Analysis from C:\test\lctprob.epd   
1/6/2010 12:17:47 PM Level: 900 Seconds
Analyzing engine: Stockfish64

1) e5;                  
    Searching move: e4-e5
    Best move (Stockfish64): e4-e5
    identical moves! Found in: 09:46
      2	00:02	         139	54	+0.28	a2a3 b7b5
      3	00:02	         661	258	+0.24	a2a3 b7b5 h2h4
      4	00:02	       1.647	642	+0.32	a2a3 b7b5 h2h4 Ra8c8
      4	00:02	       2.170	846	+0.44	Qg2g6 b7b5 Qg6f7 Re8e7 Nd4xe6 Re7xf7 Ne6xd8
      5	00:02	       3.751	1.460	+0.28	Qg2g6 b7b5 a2a3 Ra8c8 h2h4
      6	00:02	       6.725	2.612	+0.40	Qg2g6 b7b5 a2a3 Ra8c8 Qg6f7 Re8e7
      7	00:02	      11.936	4.533	+0.32	Qg2g6 b7b5 a2a3 Qd8e7 Rf1f4 Re8c8 Rf4h4
      8	00:02	      78.191	29.339	+0.40	Qg2g6 Ra8c8 a2a3 b7b5 Rg1g2 Qd8b6 Rf1xf6 Qb6xd4
      9+	00:02	     111.810	41.673	+0.64	Qg2g6 Qd8e7 Nd4f3 Bd7c6 e4e5 Nf6d7 e5xd6 Qe7xd6 Rf1d1
     10	00:02	     151.537	56.104	+0.80	Qg2g6 Qd8e7 Nd4f3 Re8c8 e4e5 d6xe5 Nf3xe5 Bd7e8 h2h4 Be8xg6 Ne5xg6+ Kh8h7 Ng6xe7 Bf8xe7 Bb3xe6
     11	00:02	     558.200	195.448	+1.13	Qg2g6 Qd8e7 Nd4e2 Re8c8 Ne2f4 Qe7e8 Qg6g3 g7g5 Nf4xe6 Bf8e7 h2h4 Nf6h5
     12	00:03	     979.615	325.995	+1.33	Qg2g6 Qd8e7 Nd4e2 Re8c8 Ne2f4 Bd7e8 Qg6g2 g7g5 Nf4xe6 Be8d7 Qg2f3 Bd7xe6 Bb3xe6 Qe7xe6 Qf3xf6+ Qe6xf6 Rf1xf6
     13	00:03	   1.534.125	484.409	+1.37	Qg2g6 Qd8e7 Nd4e2 Re8c8 Ne2f4 Qe7e8 Qg6g3 g7g5 Nf4xe6 Bd7xe6 Rf1xf6 Be6xb3 a2xb3 Qe8e5 Rf6f7 b7b5 Qg3h3 Bf8g7 Rf7f5 Rc8xc3 b2xc3 Qe5xc3 Qh3xc3 Bg7xc3
     14	00:03	   2.486.477	729.814	+1.49	Qg2g6 Qd8e7 Nd4e2 Re8c8 Ne2f4 Qe7e8 Qg6g3 g7g5 Nf4xe6 Bd7xe6 Rf1xf6 Be6xb3 a2xb3 Qe8e5 Rg1f1 Qe5xg3 h2xg3 Rc8e8 Rf6f7 Ra8b8 Rf1f6 b7b5 Nc3d5 Kh8g8 Nd5c7 Re8xe4 Nc7xa6
     14+	00:03	   4.307.201	1.093.475	+1.65	Nd4f3 Bd7c6 Qg2g6 b7b5 e4e5 d6xe5 Nf3xe5
     15	00:04	   7.490.007	1.559.118	+1.45	Nd4f3 Bd7c6 Qg2g6 Re8e7 e4e5 Nf6h7 Nf3d4 d6xe5 Nd4xe6 Qd8e8 Qg6g3 Re7xe6 Bb3xe6 Nh7g5 Be6d5 Bf8c5 Bd5xc6 Qe8xc6
     16	00:08	  13.096.622	1.608.328	+1.41	Nd4f3 Bd7c6 Nf3d4 Bc6d7 Nc3e2 e6e5 Nd4f5 g7g5 Bb3f7 Re8e7 Nf5xe7 Qd8xe7 Bf7b3 Bf8g7 Ne2c3 Bd7c6 Nc3d5 Bc6xd5 Bb3xd5 Nf6xd5 e4xd5
     17	00:14	  22.358.451	1.506.634	+1.41	Nd4f3 Bd7c6 Nf3d4 Bc6d7 Nc3e2 e6e5 Nd4f5 g7g5 Bb3f7 Re8e7 Nf5xe7 Qd8xe7 Bf7b3 Bf8g7 Ne2c3 Bd7c6 Nc3d5 Bc6xd5 Bb3xd5 Nf6xd5 e4xd5
     18+	00:19	  37.189.175	1.869.084	+1.61	Nd4f3 Nf6h5 Qg2g4 Nh5f6 Qg4g6 Nf6h7 Nf3e5 Nh7g5 Ne5xd7 Qd8xd7 h2h4
     19+	00:28	  67.618.098	2.409.081	+2.42	Nd4f3 e6e5 Qg2g6 Re8e7 Nf3h4 Bd7e8 Qg6g3 d6d5 e4xd5 Be8f7 d5d6 Qd8xd6 Bb3xf7 Re7xf7 Nh4g6+
     20	00:54	 172.074.895	3.183.035	+2.42	Nd4f3 Bd7c6 Nf3h4 g7g5 Nh4g6+ Kh8h7 h2h4 g5g4 Ng6f4 Bf8g7 Nf4xe6 Qd8e7 Qg2g3 Kh7h8 Qg3f4 Bc6d7 Ne6c7 Nf6h5 Qf4f7 Qe7xf7 Bb3xf7 Bg7xc3 Bf7xe8
     21	01:38	 362.503.819	3.671.631	+2.14	Nd4f3 Bd7c6 Nf3h4 g7g5 Nh4g6+ Kh8h7 h2h4 g5g4 Ng6f4 Bf8g7 Nf4xe6 Qd8e7 Qg2g3 Kh7h8 Qg3f4 Bc6d7 Ne6c7 b7b5 Bb3d5 Ra8d8 Nc7xe8 Rd8xe8 Bd5b7 Kh8h7 Nc3d5 Nf6xd5 Bb7xd5
     22	02:08	 483.613.107	3.773.804	+2.38	Nd4f3 Bd7c6 Nf3h4 g7g5 Nh4g6+ Kh8h7 h2h4 g5g4 Ng6f4 Bf8g7 Nf4xe6 Qd8e7 Qg2d2 Kh7h8 Rf1f4 Re8f8 Ne6xf8 Ra8xf8 a2a3 Qe7e5 Rg1f1 Kh8h7 Qd2c1 Bc6d7 Rf1g1 Rf8e8 Bb3f7 Re8f8
     23	03:06	 715.098.021	3.827.533	+2.50	Nd4f3 Bd7c6 Nf3h4 g7g5 Nh4g6+ Kh8h7 h2h4 g5g4 Ng6f4 Qd8d7 Nf4h5 Nf6xh5 Qg2xg4 Bf8g7 Qg4xh5 Re8e7 Rg1g6 d6d5 Rf1f6 Kh7g8 e4xd5 e6xd5 a2a3 Ra8d8 Qh5xh6 Rd8f8 Qh6g5 Rf8xf6 Rg6xf6 Re7e1+ Kb1a2 Re1e6 Nc3xd5
     24	04:38	1.079.363.394	3.879.099	+2.50	Nd4f3 Bd7c6 Nf3h4 g7g5 Nh4g6+ Kh8h7 h2h4 g5g4 Ng6f4 Qd8d7 Nf4h5 Nf6xh5 Qg2xg4 Bf8g7 Qg4xh5 Re8e7 Rg1g6 d6d5 Rf1f6 Kh7g8 e4xd5 e6xd5 a2a3 Ra8d8 Qh5xh6 a6a5 Rg6g5 Rd8f8 Nc3xd5 Bc6xd5 Rg5xd5 Bg7xh6 Rd5xd7+ Kg8g7 Rd7xe7+ Kg7xf6 Re7xb7 Bh6d2 Rb7b5 Rf8h8
     24+	09:46	2.375.234,184	4.052.648	+2.98	e4e5 d6xe5 Nc3e4 e5xd4 Ne4xf6 g7g5 Qg2h3 Qd8e7 Rg1xg5 Bf8g7 Rg5h5 Bg7xf6 Rh5xh6+ Kh8g8 Rf1xf6 Qe7g7 Rh6g6
   1/6/2010 12:32:50 PM, Time for this analysis: 00:15:00, Rated time: 09:46

1 of 1 matching moves
1/6/2010 12:32:50 PM, Total time: 12:15:03 AM
Rated time: 09:46 = 586 Seconds
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Dr.Ex
Posts: 202
Joined: Sun Jul 08, 2007 4:10 am

Re: hardest LCTII test position

Post by Dr.Ex »

Dann Corbit wrote: Stockfish solves it in less than ten minutes
This is quite slow Dann.
Stockfish 1.6s 32-bit slightly smoother solved it in 1:43 on a slow Dualcore
Laptop and in 40 seconds on Quad:

r2qrb1k/1p1b2p1/p2ppn1p/8/3NP3/1BN5/PPP3QP/1K3RR1 w - - 0 1

Analysis by Stockfish 1.6s:

1.a3
+/= (0.44) Tiefe: 1 00:00:00
1.a3 b5
+/= (0.28) Tiefe: 2 00:00:00
1.a3 b5 2.h4
= (0.24) Tiefe: 3 00:00:00
1.a3 b5 2.h4 Tc8
+/= (0.32) Tiefe: 4 00:00:00
1.Dg6 b5 2.Df7 Te7 3.Sxe6 Txf7 4.Sxd8
+/= (0.44) Tiefe: 4 00:00:00
1.Dg6 b5 2.a3 Tc8 3.h4
+/= (0.28) Tiefe: 5 00:00:00
1.Dg6 b5 2.a3 Tc8 3.Df7 Te7
+/= (0.40) Tiefe: 6 00:00:00 7kN
1.Dg6 b5 2.a3 Tc8 3.h4 Tc5 4.Df7
+/= (0.28) Tiefe: 7 00:00:00 12kN
1.e5 dxe5 2.Se4 exd4 3.Sxf6
+/- (0.80) Tiefe: 7 00:00:00 16kN
1.e5 dxe5 2.Se4 Sh5 3.Sf3 Dc7 4.Sh4 Sf4 5.Sg6+ Kg8
= (-0.08) Tiefe: 8 00:00:00 37kN
1.Dg6 De7 2.Tg2 b5 3.Tfg1 b4 4.Sce2 d5
= (0.24) Tiefe: 8 00:00:00 107kN
1.a3 b5 2.h4 Tb8 3.h5 b4 4.axb4 Txb4
+/= (0.32) Tiefe: 8 00:00:00 114kN
1.a3 b5 2.h4 Tc8 3.Dg6 Tb8 4.h5 b4 5.axb4 Txb4 6.Td1
+/= (0.48) Tiefe: 9 00:00:00 166kN
1.a3 b5 2.h4 Tc8 3.Dg6 Tb8 4.Sce2 e5 5.Sf5 Sxe4 6.Sxg7 Sd2+ 7.Ka2
+/- (0.72) Tiefe: 10 00:00:01 350kN
1.a3 g5 2.Dh3 g4 3.De3 Lg7 4.h3 h5 5.e5 Sd5 6.Sxd5 exd5 7.Lxd5 dxe5
+/= (0.28) Tiefe: 11 00:00:01 565kN
1.Sce2 e5 2.Sf5 Lxf5 3.Txf5 De7 4.h4 b5 5.Sc3 Tac8 6.Dg6 Dd8 7.a3 Txc3 8.bxc3 Sxe4
+/- (1.25) Tiefe: 11 00:00:01 723kN
1.Sce2 e5 2.Sf5 Lxf5 3.Txf5 De7 4.h4 Tec8 5.Sc3 Tc5 6.Dg6 Tac8 7.h5 b5
+/- (1.29) Tiefe: 12 00:00:01 894kN
1.Sce2 e5 2.Sf5 g5 3.Lf7 b5 4.Lxe8 Lxe8 5.Dh3 Ld7 6.Dd3 Lxf5 7.Txf5 Tc8 8.Sc3 b4
+- (1.49) Tiefe: 13 00:00:02 1470kN
1.Sce2 e5 2.Sf5 g5 3.Lf7 b5 4.Lxe8 Lxe8 5.Dh3 Ld7 6.Df3 Lxf5 7.Dxf5 Lg7 8.h3 Tc8 9.Sc3
+- (1.57) Tiefe: 14 00:00:03 2106kN
1.Sce2 e5 2.Sf5 g5 3.Lf7 Te7 4.Sxe7 Dxe7 5.Lb3 Lg7 6.Sc3 Lc6 7.Td1 Tc8 8.Sd5 Lxd5 9.Lxd5 Sxd5 10.Txd5
+/- (1.33) Tiefe: 15 00:00:04 3062kN
1.Sce2 e5 2.Sf5 g5 3.Lf7 Te7 4.Sxe7 Dxe7 5.Lb3 Lg7 6.Sc3 Lc6 7.Td1 Tc8 8.Ld5 b5 9.Lxc6 Txc6 10.Dd2 Kh7 11.Tgf1
+- (1.53) Tiefe: 16 00:00:05 4763kN
1.Sce2 e5 2.Sf5 g5 3.Lf7 Te7 4.Sxh6 Sh7 5.Sg4 Dc8 6.Ld5 Lg7 7.Sc3 Lxg4 8.Dxg4 Dxg4 9.Txg4 Tc7 10.h4 gxh4 11.Txh4 Tf8
+- (1.81) Tiefe: 17 00:00:13 12211kN
1.Sce2 e5 2.Sf5 g5 3.Lf7 b5 4.Lxe8 Lxe8 5.Seg3 Ta7 6.h4 g4 7.Dd2 Th7 8.Td1 Lg6 9.Tge1 Kg8 10.c3 Tc7 11.Sxh6+ Lxh6 12.Dxh6
+- (1.77) Tiefe: 18 00:00:39 38766kN
1.Sce2 g5 2.h4 g4 3.Sf4 e5 4.Sde6 Txe6 5.Sxe6 De7 6.Txf6 Dxf6 7.Dxg4 Le7 8.Ld5 Lc6 9.Sc7 Tf8 10.a3 Lxd5 11.Sxd5 Df7 12.Dd7 Lxh4 13.Dxd6 Lf6
+- (1.81) Tiefe: 19 00:01:24 84673kN
1.e5 dxe5 2.Se4 Sh5 3.Sf3 Sf4 4.Dg3 Se2 5.Dg4 Kg8 6.Sxe5 Sxg1 7.Sxd7
+- (2.14) Tiefe: 19 00:01:43 103mN
1.e5 Sh5 2.Se4 Dh4 3.Dg6 d5 4.Tg4 Dh3 5.Sg3 Le7 6.Dxh5 Dxh5 7.Sxh5 g5 8.Sf6 Tf8 9.Tgg1 Lxf6 10.exf6 Tac8 11.c3 e5 12.Sc2 Tc5 13.Te1 e4 14.Se3 Txf6 15.Sxd5
+- (3.31) Tiefe: 20 00:04:42 276mN

(German notation)
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