Stockfish finds some old vey hard positions

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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Stockfish finds some old vey hard positions

Post by Vinvin »

Intel 4930K, 6 cores 3.4 ghz

Shirov's Bh3!!! after 18min45
Karpov - Kasparov : Ng2!!! after 3h40m
Georgian peasant : Nf6+!!! after 1h18m

More positions (solved and unsolved) to come in next days.

[d]8/8/4kpp1/3p1b2/p6P/2B5/6P1/6K1 b - - 0 1
Stockfish_syzygy_14101816_x64_modern:
...
68/73 10:27 6.913.164k 11.011k -2,21 1. ... Fe4 2.g3 Rf5 3.Rf2 a3 4.Re3 Fg2 5.g4+ Rxg4 6.Fxf6 Ff3 7.Rd2 Rf5 8.Fc3 a2 9.Rd3 Fe4+ 10.Rd2 Rf4 11.Ff6 Ff3 12.Rd3 Rg4 13.Rc2 Rf5 14.Fg7 Fe4+ 15.Rc1 Rf4 16.Rd2 Rg3 17.Ff6 Ff3 18.Re3 Rg4 19.Rd3 Rg3 20.Rc2 Fe4+ 21.Rb2 Fb1 22.Rc1 Rf4 23.Rd2 Fe4 24.Fb2 Rg3 25.Ff6
69/73 10:50 7.205.561k 11.079k -2,21 1. ... Fe4 2.g3 Rf5 3.Rf2 a3 4.Re3 Fg2 5.g4+ Rxg4 6.Fxf6 Ff3 7.Rd2 Rf5 8.Fc3 a2 9.Rd3 Fe4+ 10.Rd2 Rf4 11.Ff6 Ff3 12.Rd3 Rg4
70/73 11:54 8.025.659k 11.237k -2,21 1. ... Fe4 2.g3 Rf5 3.Rf2 a3 4.Re3 Fg2 5.g4+ Rxg4 6.Fxf6 Ff3 7.Rd2 Rf5 8.Fc3 a2 9.Rd3 Fe4+ 10.Rd2 Rf4 11.Ff6 Ff3 12.Rd3 Rg4 13.Rc2 Rf5
71/73 12:30 8.470.228k 11.285k -2,21 1. ... Fe4 2.g3 Rf5 3.Rf2 a3 4.Re3 Fg2 5.g4+ Rxg4 6.Fxf6 Ff3 7.Rd2 Rf5 8.Fc3 a2 9.Rd3 Fe4+ 10.Rd2 Rf4 11.Ff6 Ff3 12.Rd3 Rg4 13.Rc2 Rf5 14.Fb2 Fe4+ 15.Rc1 Rf4 16.Fd4 Rf3 17.Rd2 Rg3 18.Ff6 Ff3 19.Re3 Rg4 20.Rd3 Rf4 21.Fg7 Rg3 22.Ff6 Fd1 23.Re3 Fg4 24.Rd3 Rf4 25.Rd2 Fe6 26.Fb2 Rg4 27.Ff6 Rf5 28.Fb2 Re4 29.Re2 Fg4+ 30.Rd2 d4 31.Fa1 Ff5 32.Fb2 Fe6 33.Fa1 Fd5 34.Fb2 Fb7 35.Fa1 Fc6 36.Fb2 Fd5 37.Re2 Fb3 38.Rd2 Fc4 39.Fa1 Fe6 40.Fb2 Fb3 41.Re2 Fd5 42.Rd2
72/77- 18:45 13.238.867k 11.767k -2,27 1. ... Fh3 2.Rh2 Fg4 3.Rg3 Rf5 4.Fb2 Re4 5.Rxg4 d4 6.Rh3 Re3 7.Fc1+ Re2 8.g4 d3 9.h5 gxh5 10.gxh5 a3
72/77- 20:42 14.865.929k 11.965k -2,34 1. ... Fh3 2.Rh2 Fg4 3.Rg3 Rf5 4.Fb2 Re4 5.Rxg4 d4 6.Rh3 Re3 7.Fc1+ Re2 8.g4 d3 9.h5 gxh5 10.gxh5 a3 11.Rg3 a2
72/77- 22:07 16.173.327k 12.179k -2,42 1. ... Fh3 2.Rh2 Fg4 3.Rg3 Rf5 4.Fb2 Re4 5.Rf2 f5 6.Re1 d4 7.Rd2 f4 8.Fa3 Rd5 9.Fc1 Re4 10.Rc2 Fe2 11.Fb2



[d]8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - 0 1
Stockfish_syzygy_14101816_x64_modern:
...
85/99 38:56 25.721.374k 11.009k +0,56 1.gxh4 Rc6 2.Cg2 Fg6 3.Cf4 Ff7 4.Cd3 Fe6 5.Re3 Rd6 6.Rf4 Fd7 7.Cc1 Re6 8.Ce2 Fe8 9.Cg3 Rd7 10.Rf5 Re7 11.Cf1 Rf7 12.Ce3 Fd7+ 13.Rf4 Fc6 14.Cf5 Rf8 15.Cg3 Fe8 16.Ce2 Re7 17.Re3 Fg6 18.Cf4 Ff7 19.Rd3 Rd6 20.Cg2 Rc6 21.Ce3 Fg6+ 22.Rc3 Fb1 23.Cg2 Fg6 24.Cf4 Ff7 25.Rb2 Rb6 26.Rb3 Rc6 27.Ce2 Fe8 28.Cg3 Fg6 29.Rc3 Rb6 30.Ch1 Rc7 31.Cf2 Rb6 32.Rb3 Rc7 33.Ch3 Rc6 34.Rc3
86/99 41:43 27.713.038k 11.068k +0,56 1.gxh4 Rc6 2.Cg2 Fg6 3.Cf4 Ff7 4.Cd3 Fe6 5.Re3 Rd6 6.Rf4 Fd7 7.Cc1 Re6 8.Ce2 Fe8 9.Cg3 Rd7 10.Rf5 Re7 11.Cf1 Rf7 12.Ce3 Fd7+ 13.Rf4 Fc6 14.Cf5 Rf8 15.Cg3 Fe8 16.Ce2 Re7 17.Re3 Fg6 18.Cf4 Ff7 19.Rd3 Rd6 20.Cg2 Rc6 21.Ce3 Fg6+ 22.Rc3 Fb1 23.Cg2 Fg6 24.Cf4 Ff7 25.Rb2 Rb6 26.Rb3 Rc6 27.Ce2 Fe8 28.Cg3 Fg6 29.Rc3 Rb6 30.Ce2 Fe8 31.Rb3 Rc6
87/102 58:50 39.700.596k 11.247k +0,56 1.gxh4 Rc6 2.Cg2 Fg6 3.Cf4 Ff7 4.Cd3 Fe6 5.Re3 Rd6 6.Rf4 Fd7 7.Cc1 Re6 8.Ce2 Fe8 9.Cg3 Rd7 10.Rf5 Re7 11.Cf1 Rf7 12.Ce3 Fd7+ 13.Rf4 Fc6 14.Cf5 Rf8 15.Cg3 Fe8 16.Ce2 Re7 17.Re3 Fg6 18.Cf4 Ff7 19.Rd3 Rd6 20.Cg2 Rc6 21.Ce3 Fg6+ 22.Rc3 Fb1 23.Cg2 Fg6 24.Cf4 Ff7 25.Rb2 Rb6 26.Rb3 Rc6 27.Ce2 Fe8 28.Cg3 Fg6 29.Rc3 Rb6 30.Ce2 Fe8 31.Cf4 Rc6 32.Rc2 Ff7 33.Rb2
88/102 1:16:42 52.116.294k 11.323k +0,56 1.gxh4 Rc6 2.Cg2 Fg6 3.Cf4 Ff7 4.Cd3 Fe6 5.Re3 Rd6 6.Rf4 Fd7 7.Cc1 Re6 8.Ce2 Fe8 9.Cg3 Rd7 10.Rf5 Re7 11.Cf1 Rf7 12.Ce3 Fd7+ 13.Rf4 Fc6 14.Cf5 Rf8 15.Cg3 Fe8 16.Ce2 Re7 17.Re3 Fg6 18.Cf4 Ff7 19.Rd3 Rd6 20.Cg2 Rc6 21.Ce3 Fg6+ 22.Rc3 Fb1 23.Cg2 Fg6 24.Cf4 Ff7 25.Rb2 Rb6 26.Rb3 Rc6 27.Ce2 Fe8 28.Cg3 Fg6 29.Rc3 Rb6 30.Ce2 Rc7 31.Rb2 Ff7 32.Cg3 Fg6 33.Ce2
89/104+ 3:40:00 144.288.796k 10.930k +0,63 1.Cg2 hxg3+ 2.Rxg3
89/104+ 5:15:10 210.487.524k 11.131k +0,69 1.Cg2 hxg3+ 2.Rxg3



[d] 8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - - 0 1
Stockfish_syzygy_14101816_x64_modern:
...
42/67 1:05:23 43.112.875k 10.988k -4,11 1.Cxe3 Fa5 2.Rc6 Cb8+ 3.Rb5 Fd8 4.Fg4 Rg6 5.Rxc5 Ce4+ 6.Rc4 Cxg3 7.Rxc3 h5 8.Fe6 Ce2+ 9.Rd2 Cf4 10.Fb3 Fa5+ 11.Rd1 Cxd7 12.Cc4 Fb4 13.Fa4 Cc5 14.Fb5 h4 15.Ce3 Rg5 16.Cf1 Ccd3 17.Fa6 Ce5 18.Fb7
43/67+ 1:07:17 44.408.079k 10.998k -4,05 1.Rc6 Cb8+ 2.Rc7 Cxd7
43/67- 1:08:52 45.431.277k 10.995k -4,17 1.Rc6 Cb8+ 2.Rc7 Cxd7
43/67 1:15:14 49.844.312k 11.041k -4,17 1.Cxe3 Fa5 2.Rc6 Cb8+ 3.Rb5 Fd8 4.Fg4 Rg6 5.Rxc5 Ce4+ 6.Rc4 Cxg3 7.Rxc3 h5 8.Fe6 Ce2+ 9.Rd2 Cf4 10.Fb3 Fa5+ 11.Rd1 Cxd7 12.Cc4 Fb4 13.Fa4 Cc5 14.Fb5 h4 15.Ce3 Rg5 16.Cf1 Ccd3 17.Fa6 Ce5 18.Fb7 Fa5 19.Rc2 Fb6 20.Rb1 Fc7 21.Rb2 Fd8 22.Fa6 h3 23.Cg3
44/67+ 1:18:38 52.182.999k 11.058k -4,11 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Cf7+ 5.Re6 Cxd8+ 6.Rf5 e2 7.Fe4 e1C 8.Fd5 c2 9.Fc4 Cf3 10.Fe2
44/67+ 1:18:41 52.206.176k 11.056k -4,05 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Cf7+ 5.Re6 Cxd8+ 6.Rf5 e2 7.Fe4 e1C 8.Fd5 c2 9.Fc4 c1C 10.Fb5 Cc7 11.Fa4 Cf3 12.Fd1 Ce2
44/67+ 1:18:44 52.221.318k 11.054k -3,96 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Cf7+ 5.Re6 Cxd8+ 6.Rf5 e2 7.Fe4 e1C 8.Fd5 c2 9.Fc4 c1C 10.Fb5 Cc7 11.Fa4 Cf3 12.Fd1 Ce2 13.Fxe2
44/67+ 1:19:39 52.641.256k 11.015k -0,38 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Cf7+ 5.Re6 Cxd8+ 6.Rf5 e2 7.Fe4 e1C 8.Fd5 c2 9.Fc4 c1C 10.Fb5 Cc7 11.Fa4 Cf3 12.Fd1 Ce2 13.Fxe2
44/67+ 1:20:00 52.851.284k 11.009k +1,06 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Rf3 7.Fd1+ Rf2
44/67+ 1:20:32 53.155.141k 10.999k +3,05 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Rf3 7.Fd1+ Rf2 8.Dh5 Rxg3
44/67+ 1:22:48 54.698.599k 11.008k +5,79 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Rf3 7.Fd1+ Rf2 8.Dh5 Rxg3
44/99 1:31:29 60.354.776k 10.995k +7,93 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Re5 Cf2 10.Dxe3 c2 11.Fxc2 Cc7 12.Ff5 Cb5 13.Dxh6 Cd4 14.Dc1+ Rh2 15.Df4 Rg2 16.Fe4+ Rf1 17.g4 Re1 18.g5 Ce2 19.Dh4 Rf1 20.g6 Fc3+ 21.Rd5 Fg7
45/99+ 1:31:57 60.682.334k 10.998k +8,00 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Re5 Cf2 10.Dxe3 c2 11.Fxc2 Cc7 12.Dc1+ Rg2 13.Fe4+ Cxe4 14.Rxe4 Cb5 15.Db2+ Rh3 16.Df6 Cd4 17.Dxh6+ Rg2 18.Dc1 Cf3
45/99+ 1:32:05 60.774.066k 10.999k +8,06 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Re5 Cf2 10.Dxe3 c2 11.Fxc2 Cc7 12.Dc1+ Rg2 13.Fe4+ Cxe4 14.Rxe4 Cb5 15.Db2+ Rh3 16.Df6 Cd4 17.Dxh6+ Rg2
45/99+ 1:32:12 60.855.156k 10.999k +8,14 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Re5 Cf2 10.Dxe3 c2 11.Fxc2 Cc7 12.Dc1+ Rg2 13.Fe4+ Cxe4 14.Rxe4 Cb5 15.Db2+ Rh3 16.Df6 Cd4 17.Dxh6+ Rg2
45/99+ 1:32:20 60.943.297k 10.999k +8,26 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Re5 Cf2 10.Dxe3 c2 11.Fxc2 Cc7 12.Dc1+ Rg2 13.Fe4+ Cxe4 14.Rxe4 Ce6 15.Dxh6 Cd4 16.Dc1 Rf2
45/99+ 1:32:34 61.098.503k 11.000k +8,42 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Re5 Cf2 10.Dxe3 c2 11.Fxc2 Cc7 12.Dc1+ Rg2 13.Fe4+ Cxe4 14.Rxe4 Ce6 15.Dxh6 Cd4 16.Dc1 Cb5 17.g4 Cc3+ 18.Rd3 Cb5 19.g5 Cd6 20.g6 Cb7 21.Dg5+ Rh1 22.g7
45/99+ 1:32:42 61.186.942k 11.001k +8,63 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Re5 Cf2 10.Dxe3 c2 11.Fxc2 Cc7 12.Dc1+ Rg2 13.Fe4+ Cxe4 14.Rxe4 Ce6
45/99+ 1:33:01 61.408.254k 11.003k +8,93 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Re5 Cf2 10.Dxe3
45/99+ 1:33:23 61.680.268k 11.007k +9,34 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Re5 Cf2 10.Dxe3
45/99- 1:33:37 61.859.408k 11.011k +7,87 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5
45/99- 1:33:51 62.005.955k 11.011k +7,10 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5
45/99+ 1:35:34 63.267.280k 11.032k +9,90 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 c4+ 9.Rc6 Fc5 10.Rb5 Ce4 11.Rxa6 Cf2 12.Rb5 Fa7 13.Rxc4 Ch3 14.Fc2
45/99+ 1:37:41 64.840.509k 11.062k +11,35 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 c2 9.Dxe3+
45/99 1:38:07 65.180.099k 11.071k +11,18 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 c4+ 8.Rc6 Rg2 9.De2+ Rh3 10.Dxe3 Fc5 11.Dxc3 Ff2 12.Dxc4 Cc5 13.Dh4+ Rg2 14.Dxh6 Fe3 15.Dh8 Cd3 16.Dh5 Cf2 17.De2 Fd4 18.Dd2 Ff6 19.Dd5+ Rg1 20.Df5 Fd8 21.Rd7 Cf7 22.Fb3 Fb6 23.Fxf7 Fe3 24.Fd5 Rf1 25.Df3 Fc5 26.Fc4+ Rg1 27.De2 Ch1 28.Dd1+ Rg2 29.Dd5+ Rh2 30.Dxc5 Cxg3
46/99+ 1:38:27 65.417.577k 11.074k +11,24 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 c4+ 8.Rc6 Rg2 9.De2+ Rh3 10.Dxe3 Fc5 11.Dxc3 Ff2 12.Dxc4
46/99+ 1:38:36 65.527.660k 11.075k +11,30 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 c4+ 8.Rc6 Rg2 9.De2+ Rh3 10.Dxe3
46/99- 1:38:52 65.730.997k 11.079k +11,12 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3
46/99- 1:38:56 65.768.773k 11.079k +11,00 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D
46/99- 1:38:59 65.813.730k 11.080k +10,84 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8
46/99+ 1:39:27 66.134.707k 11.083k +11,39 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+
46/99+ 1:39:50 66.415.742k 11.088k +11,68 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+
46/99- 1:39:51 66.429.988k 11.088k +10,62 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.Dd2+ Rg3 12.Fxc2
46/99+ 1:40:21 66.799.603k 11.094k +12,09 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.Dd2+ Rg3 12.Dc3+ Cd3 13.Fxc2 Fb2 14.Dxc4 Ce1 15.Dc7+ Rg2 16.Dc6+ Rf2 17.Fd1 Fd4 18.Dxh6
46/99+ 1:41:04 67.326.232k 11.102k +12,86 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.Dd2+ Rg3 12.Dc3+ Cd3 13.Fxc2
46/99 1:42:02 68.052.289k 11.115k +12,90 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg2 8.De2+ Rh3 9.Dxe3 Fa5 10.g4+ Rg2 11.De2+ Rg1 12.Dxa6 Fd8 13.Rd5 Fc7 14.Da7 Fg3 15.Dxc5+ Rh2 16.Dxc3 Ff4 17.De1 Ch3 18.De2+ Rg1 19.Df3 Rh2 20.De2+
47/99+ 1:42:31 68.396.515k 11.118k +12,96 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg2 8.De2+ Rh3 9.Dxe3 Fa5 10.g4+ Rg2 11.De2+ Rg1 12.Dxa6
47/99+ 1:42:53 68.665.316k 11.122k +13,02 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg2 8.De2+ Rh3 9.Dxe3 Fa5 10.g4+ Rg2 11.De2+ Rg3 12.Dxa6
47/99+ 1:43:02 68.770.494k 11.123k +13,11 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg2 8.De2+ Rh3 9.Dxe3 Fa5 10.g4+ Rg2 11.De2+ Rg3 12.Dxa6
47/99+ 1:43:11 68.871.014k 11.124k +13,22 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg2 8.De2+ Rh3 9.Dxe3 Fa5 10.g4+ Rg2 11.De2+ Rg3 12.Dxa6 Fd8 13.Rxc5 Fc7 14.Dd3+ Rh4 15.Rd5 Cf7 16.Dxc3
47/99+ 1:43:18 68.955.400k 11.125k +13,38 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg2 8.De2+ Rh3 9.Dxe3 Fa5 10.g4+ Rg2 11.De2+ Rg3 12.Dxa6 Fd8 13.Rxc5 Ce4+ 14.Rd4 Fh4
47/99+ 1:43:32 69.133.771k 11.128k +13,60 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg2 8.De2+ Rh3 9.Dxe3 Fa5 10.g4+ Rg2 11.De2+ Rg3 12.Dxa6
47/99+ 1:43:59 69.455.851k 11.131k +13,90 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg2 8.De2+ Rh3 9.Dxe3 Fa5 10.g4+ Rg2 11.De2+ Rg3 12.Dxa6
47/99- 1:44:13 69.618.437k 11.132k +12,84 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3
47/99- 1:44:48 70.029.239k 11.135k +12,28 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5
47/99+ 1:45:16 70.360.842k 11.140k +14,31 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Rf3 7.Fd1+ Rg2 8.Dxe3 Fc5 9.Dxc3 Ff2 10.Dxc4
47/99+ 1:46:14 71.087.564k 11.151k +15,36 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Rf3 7.Fd1+ Rg2 8.Dxe3
47/99- 1:46:41 71.409.495k 11.156k +11,51 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5
47/99- 1:46:48 71.491.800k 11.156k +9,52 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5
47/99+ 1:47:45 72.147.762k 11.159k +16,81 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1
47/99+ 1:49:01 73.071.928k 11.171k +20,57 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cf2 10.Dxe3
47/99+ 1:49:45 73.600.882k 11.176k +25,74 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cf2 10.Dxe3
47/99+ 1:50:22 74.051.820k 11.181k +32,84 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Cc7 9.Dxe3+ Rg2 10.Rxc7
47/99+ 1:50:52 74.420.750k 11.187k +42,60 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Cc7 9.Dxe3+ Rg2 10.Rxc7
47/99 1:50:59 74.515.077k 11.189k +42,60 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rf1 11.Dxh6 Cc7+ 12.Rc6 Ca6 13.Dh1+ Rf2 14.Dh2+ Re3 15.Dh6+ Rf2 16.Df4+ Rg2 17.De3 Cb8+ 18.Rd5 Cd7 19.De2+ Rg1 20.De6 Cb8 21.De1+ Rg2 22.De2+ Rh3 23.Dh5+ Rg2 24.De8 Cf1 25.De2+ Rg1 26.Fc2 Cd7 27.Fd3 Cf6+ 28.Re5 Cg4+ 29.Dxg4 c2 30.Df4 Ch2 31.De3+ Rg2 32.Fe4+ Rh3 33.Rd5 Fc3 34.Ff5+ Rg2 35.Dxc3 Rf2
48/99- 1:51:01 74.528.196k 11.188k +42,54 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6 Cc7+ 12.Rc6 Ca6 13.De3
48/99- 1:51:01 74.532.026k 11.188k +42,48 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1
48/99- 1:51:03 74.549.488k 11.188k +39,87 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1
48/99- 1:51:03 74.552.801k 11.188k +38,81 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D
48/99- 1:51:04 74.558.086k 11.188k +37,36 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1
48/99- 1:51:17 74.714.243k 11.189k +35,37 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6
48/99- 1:51:24 74.794.400k 11.189k +32,63 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D
48/99- 1:51:28 74.837.880k 11.190k +28,87 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6
48/99- 1:51:51 75.112.664k 11.191k +16,61 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6
48/99+ 1:52:20 75.429.461k 11.191k +42,66 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.De2+ Rh3
48/99+ 1:53:09 76.037.200k 11.199k +56,08 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3
48/99+ 1:53:45 76.485.857k 11.206k +74,54 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Fb2
48/99 1:54:00 76.684.331k 11.210k +12,64 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6 Cc7+ 12.Rc6 Ca6 13.De3 Cb8+ 14.Rd5 Cd7 15.De2+ Rg1 16.De6 c2 17.Fxc2 Cf3 18.Dxd7 Ce1 19.Dg4 Cxc2 20.Dd1+ Ce1 21.De2 Cg2 22.Re4 Fa5 23.Dd1+ Ce1 24.Dh5 Fb4 25.g4 Rf1 26.Dh3+ Re2 27.Dh2+ Rd1 28.g5 Rc1 29.g6 c4 30.g7 Cf3 31.Dh1+ Rb2
49/99+ 1:54:15 76.855.193k 11.211k +12,70 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6
49/99+ 1:54:26 76.980.213k 11.211k +12,76 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6
49/99+ 1:55:16 77.548.149k 11.212k +14,60 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6
49/99+ 1:55:27 77.673.093k 11.212k +15,37 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2
49/99+ 1:55:36 77.778.268k 11.213k +16,43 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6
49/99+ 1:55:43 77.861.444k 11.213k +17,87 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6 Cc7+ 12.Rc6 Ca6 13.De3 Cb8+ 14.Rd5
49/99+ 1:55:51 77.946.194k 11.214k +19,87 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6
49/99+ 1:56:14 78.216.214k 11.214k +31,53 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6
49/99+ 1:56:22 78.297.230k 11.214k +38,63 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6 Cc7+ 12.Rc6 Ca6 13.De3 Cb8+ 14.Rd5
49/99+ 1:56:35 78.448.690k 11.214k +48,39 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6
49/99+ 1:56:43 78.541.678k 11.215k +61,82 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 Ce4+ 9.Rd5 Cd2 10.Dxe3+ Rg2 11.Dxh6
49/99+ 1:57:01 78.755.146k 11.217k +80,27 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 Rf3 6.Dh5+ Rf2 7.Fd1 Rg1 8.De2 c2 9.Dxe3+ Rf1
49/99- 1:57:19 79.000.737k 11.222k +12,58 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+
49/99+ 1:57:57 79.440.707k 11.224k +105,64 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3
49/103 2:21:34 95.794.241k 11.278k +123,00 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.De2+ Rg3 12.De1+ Rg2 13.Dd2+ Rg3 14.Dc3+ Cd3 15.Fxc2 Fb2 16.Dxc4 Ce1 17.Dc7+ Rh3 18.Fd1 Cg2 19.Dc6 Fg7 20.Dg6 Ff8 21.Df6 Rg3 22.Dxf8 Cf4 23.Da3+ Rg2 24.Db2+ Rf1 25.Dc3
50/103- 2:21:52 95.995.030k 11.277k +122,93 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D
50/103- 2:21:53 96.004.390k 11.277k +122,87 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.Dd2+ Rg3 12.Fxc2 Cxc2
50/103- 2:21:54 96.018.813k 11.277k +122,79 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3
50/103- 2:21:54 96.020.959k 11.277k +122,67 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.Dd2+ Rg3 12.Fxc2
50/103- 2:22:09 96.164.738k 11.275k +122,51 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.Dd2+ Rg3 12.Fxc2 Cxc2
50/103- 2:22:10 96.175.562k 11.274k +122,29 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.Dd2+ Rg3 12.Fxc2 Cxc2
50/103- 2:22:11 96.182.516k 11.274k +122,00 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6
50/103- 2:22:11 96.188.574k 11.274k +121,59 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.Dd2+ Rg3 12.Fxc2
50/103- 2:22:12 96.191.543k 11.274k +121,03 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fa3 7.Fd1+ Rh3 8.Dxe3 Cb4+ 9.Rb5 c2 10.g4+ Rg2 11.Dd2+ Rg3 12.Fxc2 Cxc2
50/103- 2:22:12 96.191.725k 11.274k +120,26 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6
50/103- 2:22:19 96.263.429k 11.273k +55,36 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6
50/103- 2:22:19 96.268.517k 11.273k +29,99 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4
50/112+ 4:06:48 171.233.173k 11.563k +123,06 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6
50/112 4:22:12 181.449.260k 11.533k +123,06 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fc5 7.Fd1+ Rh3 8.Dh5+ Rg2 9.De2+ Rg1 10.Rb5 Ce4 11.Rxa6 Cf2 12.Fa4 Cd3 13.Fc6 Cf2 14.Dxc4 Fe7 15.Dxc3 Fg5 16.Rb5 Rh2 17.De1 Rxg3 18.Dg1+ Rh4 19.Ff3 Ff4 20.Dg7 Rh3 21.Dg6 Fg5 22.Df5+ Rh2 23.Fe2 Ch3 24.Rc4
51/112- 4:22:35 181.654.181k 11.530k +123,00 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5
51/112- 4:22:46 181.760.946k 11.528k +122,93 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5
51/112- 4:22:53 181.825.606k 11.527k +122,85 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5
51/112- 4:22:55 181.847.321k 11.527k +122,73 1.Cf6+ Rg7 2.Ch5+ Rg6 3.Fc2+ Rxh5 4.d8D Rg4 5.De8 c4+ 6.Rc6 Fc5 7.Fd1+ Rh3 8.Dh5+ Rg2 9.De2+ Rg1 10.Rb5
51/112- 4:22:57 181.871.733k 11.527k +122,57 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D
51/112- 4:23:57 181.976.603k 11.490k +121,59 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D
51/112- 4:24:15 181.994.581k 11.478k +121,03 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D Cf7+
51/112- 4:24:29 182.000.949k 11.468k +120,09 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D
51/112- 4:24:37 182.015.834k 11.464k +117,58 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D
51/112- 4:24:41 182.024.016k 11.462k +115,59 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D Cf7+
51/112- 4:24:52 182.033.171k 11.454k +112,86 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D
51/112- 4:24:55 182.038.070k 11.452k +109,10 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D Cf7+
51/112- 4:25:40 182.204.111k 11.430k +103,93 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D
51/112- 4:26:19 182.269.470k 11.406k +28,26 1.Cf6+ Rg7 2.Ch5+ Rg6 3.d8D
Top
lech
Posts: 1136
Joined: Sun Feb 14, 2010 10:02 pm

Re: Stockfish finds some old vey hard positions

Post by lech »

A good and interesting idea, Vincent!
The result of 2nd example Karpov-Kasparov is very weak, though.
I tried Sting-sf-47 (i5, 1024 m Hash, 4 threads) and got the solution in 9 minutes only! :shock:
Maybe, I can't be friendly, but let me be useful.
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rvc
Posts: 7
Joined: Sun Nov 17, 2013 4:08 pm

Re: Stockfish finds some old vey hard positions

Post by rvc »

Hello Vincent,

Indeed, here are the analysis by Sting SF 4.7 x64 AVX on a Intel i7-4750HQ laptop, 4 cores, 4096MB hash


Shirov's Bh3!!! --> 4m25s
FEN: 8/8/4kpp1/3p1b2/p6P/2B5/6P1/6K1 b - - 0 1

Sting SF 4.7:
...
40/33 00:14 108,548k 7,255k -4.76 1. ... a3 2.Kf2 Bc2 3.g3 Kf5 4.Kf3 Be4+ 5.Ke3 Bh1 6.Bd4 a2 7.Ba1 Kg4 8.Bxf6 Kxg3 9.Kd3 Bf3 10.Ke3 Be4 11.Ke2 Bf3+ 12.Kd2 Bg4 13.Kc2 Bf5+ 14.Kb2 Bb1 15.Kc1 Kf3 16.Kd2 Kg2 17.Bd4 Kf3 18.Be5 Kg4 19.Bf6 Be4 20.Ke3 Kg3
41/54 00:34 250,200k 7,291k -4.76 1. ... a3 2.Kf2 Bc2 3.g3 Kf5 4.Kf3 Be4+ 5.Ke3 Bh1 6.Bd4 a2 7.Ba1 Kg4 8.Bxf6 Kxg3 9.Kd3 Bf3 10.Ke3 Be4 11.Ke2 Kg4 12.Ke3 Bf3 13.Be5 Bd1 14.Bf6 Kg3 15.Kd2 Bb3 16.Ke3 Bc4 17.Kd2 Kg4 18.Ke3 Bf1 19.Kd2 Bc4
42/54 00:59 429,930k 7,266k -4.76 1. ... a3 2.Kf2 Bc2 3.g3 Kf5 4.Kf3 Be4+ 5.Ke3 Bh1 6.Bd4 a2 7.Ba1 Kg4 8.Bxf6 Kxg3 9.Kd3 Bf3 10.Ke3 Be4 11.Ke2 Kg4 12.Kf2 Kf5 13.Bc3 Kf4 14.Bd2+ Kg4 15.Bc3 Kxh4 16.Ke2 Kg5 17.Kd2 Kf5 18.Kc1 Bb1 19.Kb2 g5 20.Ka1 g4 21.Be1 Ke4 22.Kb2 Kf4 23.Bd2+ Ke4 24.Be1
43- 04:25 1,960,265k 7,394k -4.84 1. ... Bh3
43- 05:08 2,308,232k 7,473k -4.92 1. ... Bh3
43- 21:01 9,454,636k 7,496k -18.54 1. ... Bh3
43/86 26:52 11,928,347k 7,396k -23.79 1. ... Bh3 2.Bb2 Kf5 3.Kf2 Bxg2 4.Ke3 Bh1 5.Kd2 Be4 6.Bd4 g5 7.h5 Kg4 8.h6 Kh5 9.Bxf6 Kxh6 10.Kc3 g4 11.Be5 Kg6 12.Bg3 Kf5 13.Bd6 Ke6 14.Bg3 a3 15.Be1 a2 16.Kb2 Kf5 17.Kxa2 Kf4 18.Bc3




Karpov - Kasparov : Ng2!!! --> 1m05s
FEN: 8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - 0 1

Sting SF 4.7:
...
36/44 00:17 139,563k 8,000k +0.60 1.gxh4 Kc6 2.Ng2 Bg6 3.Nf4 Bf7 4.Nd3 Bg6 5.Nc5 Kb6 6.Ke3 Bf5 7.Kf4 Bh3 8.Nd3 Be6 9.Ke3 Kc7 10.Nc5 Bc8 11.Kd2 Kc6 12.Kc3 Kc7 13.Kd2
37+ 00:18 147,950k 8,099k +0.68 1.gxh4
37/44 00:27 223,657k 8,203k +0.68 1.gxh4 Kc6 2.Ng2 Bg6 3.Nf4 Bf7 4.Nd3 Bg6 5.Nc5 Kb6 6.Ke3 Bf5 7.Kf4 Bh3 8.Nd3 Kc6 9.Kg3 Be6 10.Nc5 Bc8 11.Kf4 Kd6 12.Kg3 Kc7 13.Nb3 Kd6 14.Nc1 Be6 15.Ne2 Bf7 16.Kf4 Bg6 17.Ke3 Bf5 18.Nf4
38+ 01:05 585,649k 8,935k +0.80 1.Ng2
38+ 01:09 620,223k 8,917k +0.92 1.Ng2
38+ 01:19 708,365k 8,898k +1.11 1.Ng2
38/55 01:44 926,888k 8,857k +0.76 1.Ng2 hxg3+ 2.Kxg3 Bg6 3.Kh4 Ke6 4.Nf4+ Kf5 5.Nxd5 Be8 6.Nc7 Bc6 7.d5 Bb7 8.Kxh5 Ke5 9.Kg6 f5 10.f4+ Kxf4 11.d6 Bc8 12.Kf6 Ke4 13.Nxa6 f4 14.Nc5+ Kd4 15.Ne6+ Kd5 16.Nxf4+ Kxd6 17.Kg5 Be6 18.Kg6 Bb3 19.Kf6 Bc4 20.Kf5 Bb3 21.Kf6


Georgian peasant : Nf6+!!! --> 2m57s
FEN: 8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - - 0 1

Sting SF 4.7:
...
29/49 01:44 621,310k 5,924k -3.27 1.d8Q Nf7+ 2.Ke7 Nxd8 3.Kxd8 Ba5+ 4.Ke7 e2 5.Bxe2 Nb4 6.Ne3 Bc7 7.Kf7 Bxg3 8.Bd1 Kh8 9.Kg6 Kg8 10.Nc2 Nd3 11.Kxh6 Kf7 12.Kg5 Nf2 13.Bf3 Ke6 14.Bh5 Ne4+ 15.Kg6 Ke5 16.Bf3 Bf4 17.Be2 Nd6 18.Bf3 Nf5
30- 02:23 860,690k 5,985k -3.39 1.d8Q
30/49 02:33 923,195k 6,015k -3.39 1.d8Q Nf7+ 2.Ke7 Nxd8 3.Kxd8 Ba5+ 4.Ke7 e2 5.Bxe2 Nb4 6.Ne3 Bc7 7.Kf7 Bxg3 8.Bd1 Kh8 9.Kg6 Kg8 10.Nc2 Nd3 11.Kxh6 Kf7 12.Kg5 Nf2 13.Bf3 Ke6 14.Bh5 Ne4+ 15.Kg6 Ke5 16.Bf3 Nd6 17.Be2 Bf4 18.Bd3 Ne4 19.Bc4 Nd6
31+ 02:57 1,079,349k 6,078k -3.27 1.Nf6+
31+ 02:58 1,086,681k 6,078k -3.15 1.Nf6+
31+ 04:02 1,503,811k 6,205k +2.65 1.Nf6+
31/62 04:54 1,862,106k 6,313k +4.68 1.Nf6+ Kg7 2.Nh5+ Kg6 3.Bc2+ Kxh5 4.d8Q Kg4 5.Qe8 c4+ 6.Kc6 Ba3 7.Qxe3 Nb4+ 8.Kb7 Nxc2 9.Qxc3 Bc5 10.Qxc4+ Nd4 11.Qxc5 Nf5 12.Qd5 h5 13.Qd1+ Kxg3 14.Qxh5 Ne4 15.Kb8 Kf4 16.Qh2+ Ke3 17.Qg1+ Kd2 18.Qg4 Nfd6 19.Kc7




If you want to give Sting a try, you can find all compiles here:
https://www.dropbox.com/s/f8g5psqo3bhhl ... es.7z?dl=0


Cheers.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Stockfish finds some old vey hard positions

Post by Vinvin »

Yes, I agree with both of you, Sting is the best on solving hard positions. But Stockfish is clear stronger on playing games. What we need is an engine who have all the advantages (strong in play and in solving).
Thanks for the files ! I've a pack of very interesting hard positions, I'll test Sting after SF on them.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Stockfish finds some old vey hard positions

Post by Vinvin »

Here are some positions hard for SF (there still about 5 to check to be sure there's only 1 clear best move).

1q1r3k/3P1pp1/ppBR1n1p/4Q2P/P4P2/8/5PK1/8 w - - bm Rxf6
1r1rb1k1/5ppp/4p3/1p1p3P/1q2P2Q/pN3P2/PPP4P/1K1R2R1 w - - bm Rxg7!!
1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - - bm Rxb3!!
1rb4k/p5np/3p1rp1/1ppB4/2N2P2/1P2R1P1/P1P4P/4R1K1 w - - bm Re8
1rr3k1/3b1pq1/4p2p/1n1pP2P/2P2QP1/1p6/1P6/1K1RNB1R b - bm Nc3
2b1r3/r2ppN2/8/1p1p1k2/pP1P4/2P3R1/PP3PP1/2K5 w - - bm Nd6!!
2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - am Nxb6+?
2k5/p7/Pp1p1b2/1P1P1p2/2P2P1p/3K3P/5B2/8 w - - bm c5
2r5/prkpR1p1/2p1ppK1/P1p1N1B1/P1P1P3/8/8/8 w - - bm Bf4
3Q4/3p4/P2p4/N2b4/8/4P3/5p1p/5Kbk w - - bm Qa8!!
4R3/P7/2bB2p1/r3pk2/2p2p1P/2P2P1K/6P1/8 w - - bm Rxe5+
4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - bm Qxe5!!
5k2/4bp2/2B3p1/1P4p1/3R4/3P2PP/2r2PK1/8 b - - bm Rxf2+; c0 "Uhlmann-Malich,Berlin 1968"; fmvn 53; hmvc 0; id "Nightmare Nr.021";
5kN1/3p1q2/5P2/5PP1/2pK4/1p1R4/1P6/8 w - - bm Rxb3
7r/p3k3/2p5/1pPp4/3P4/PP4P1/3P1PB1/2K5 w - - bm Kd1
8/1p2b3/6k1/5p2/p2NbP1p/P1B1P1p1/1P5P/6K1 w - - bm h3!
8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - - bm Be2!
8/4nk2/1p3p2/2rp2pp/1P1R1N1P/6P1/3KPP2/8 b - - am Rb5?
8/6pp/1K6/N5P1/3N4/8/npn1P3/k7 w - - bm Nab3+; c0 "Lommer 1963"; fmvn 1; hmvc 0;id "Nightmare Nr.020";
8/8/8/2pK3p/8/5N2/1P4pq/5Rbk w - - bm Rb1!!
8/8/8/3k2p1/4p3/2b1P1pP/4KNP1/8 w - - bm Nxe4!!
k7/p1pR4/1p3p2/2P2rpB/PbP4p/2N1p2p/KP6/8 w - - bm Bf3!!
n2Bqk2/5p1p/Q4KP1/p7/8/8/8/8 w - - bm Qc8!!
r1b1r2k/pp1n1pp1/1qpb3p/8/3PB2B/5N2/PPQ2PPP/R3R1K1 w - - Bg6!!
r1b2rk1/1pq2ppp/p1p1p3/2n1P3/2N2P2/3B4/PPP3PP/R2Q1RK1 w - - Bxh7!
r1b2rk1/2q1bppp/p2pp3/2n3PQ/1p1BP3/1BN5/PPP2P1P/2KR2R1 w - - bm Bf6
r1b3r1/3kb1pp/2qp4/p2Nn1P1/3BP2P/4Q3/1PP2R2/1K1R4 b - - am Ng4?
r1bqn1nk/ppp4p/3p4/3Pp1r1/2P1Pp2/2NB1P2/PP2N3/2K1Q1RR w - - bm Rxh7
r1q1rbk1/2pp1ppp/p1b5/1p1NP3/3Q4/3R2B1/PPP2PPP/5RK1 w - - bm Nf6!!
r2q1r2/1b2bpkp/p3p1p1/2ppP1P1/7R/1PN1BQR1/1PP2P1P/4K3 w - - bm Qf6+; c0 "Asauskas-Malisauskas, Vilnius 2004"; fmvn 19; hmvc 0; id "Nightmare Nr.019";
r2q1rk1/ppp2p2/3p1np1/4pNQ1/4P1pP/1PPP4/1P3P2/R3K1R1 w Q - bm Qh6
r5k1/6b1/2Nq4/2pP1p2/p1P1pPr1/Pp6/3R2PQ/1K3R2 b - - bm e3
r5n1/p1p1q2k/4b2p/3pB3/3PP1pP/8/PPPQ2P1/5RK1 w - - bm Qf4
rnbRrk2/2p5/1p2PB1p/pP4p1/8/P3R2P/2P2P2/6K1 w - - bm h4
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Stockfish finds some old vey hard positions

Post by zullil »

Vinvin wrote:Here are some positions hard for SF (there still about 5 to check to be sure there's only 1 clear best move).

[D]1q1r3k/3P1pp1/ppBR1n1p/4Q2P/P4P2/8/5PK1/8 w - - bm Rxf6
Stockfish solves this, though perhaps not as quickly as it might:

Code: Select all

info depth 47 seldepth 87 multipv 1 score mate 27 nodes 5550789962 nps 15198150 time 365228 pv d6f6 b8e5 f4e5 g7f6 e5f6 b6b5 a4b5 a6b5 c6b5 d8b8 g2f3 h8h7 b5d3 h7g8 f3e4 b8d8 d3b5 d8b8 e4d5 b8b5 d5d6 b5h5 d7d8q g8h7 d8f8 h7g6 f8g7 g6f5 g7f7 f5g4 f7h5 g4h5 f6f7 h5g4 f7f8q g4h3 f8h6 h3g2 h6e3 g2f1 f2f4 f1g2 f4f5 g2f1 f5f6 f1g2 f6f7 g2f1 f7f8q

Code: Select all

info depth 51 seldepth 87 multipv 1 score mate 23 nodes 12165637884 nps 20756932 time 586100 pv d6f6 g7f6 e5f6 h8g8 f6h6 d8d7 h6g5 g8f8 h5h6 b8c7 c6d7 c7b7 g2h2 b7d7 g5g7 f8e7 h6h7 d7d2 g7e5 e7d7 h2g2 d7c6 h7h8q d2d5 e5d5 c6d5 f4f5 b6b5 h8g7 b5a4 g7f7 d5c5 f5f6 c5b4 f7d7 a4a3 f6f7 b4c3 f7f8q c3b2 d7d2 b2a1 f8a3 a1b1 d2b2
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Stockfish finds some old vey hard positions

Post by Vinvin »

Sometimes Stockfish find Rxf6 fast by luck.
I've 4 run on an i7, 6 cores@4GHz where it doesn't find it.
Not found in 30 min, 12 min, 12 min and 6 min.
Stockfish always want to play Qd4. But when Rxf6 is played on the board, it see in a couple of seconds a score > 50.
Please, retest it 3 or 4 times.

Code: Select all

 2 Rfx6                 
    Coup cherché: Td6xf6
    Meilleur coup (Stockfish_syzygy_14102612_x64_modern): De5-d4
    Non trouvé dans: 30:00
...
    53/98+	14:35	 12.325.040k	14.073k	+3,59	1.Dd4  Rg8  2.Txf6
    53/102+	15:38	 13.256.257k	14.119k	+3,81	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7
    53/102	16:08	 13.691.518k	14.135k	+3,72	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7  7.h6  Dd4  8.f3  Dd2+  9.Rh3  Dd1  10.Dg7+  Re7  11.Dg2  Dd3  12.Dg5+  f6  13.Dg7+  Re6  14.Rg3  Dd4  15.Db7  Dg1+  16.Rh4  Dh1+  17.Rg4  Dxh6  18.Dxb6+  Rd5  19.Da5+  Rd4  20.Db4+  Re3  21.De1+  Rd4  22.De4+  Rc5  23.Rf5  a5  24.Re6  f5+  25.Rxf5  Df8+  26.Rg4  Dg8+  27.Rh4  Dd8+  28.Rh3  Dc8+  29.f5  Dh8+  30.Rg3  Dg7+  31.Rf2  Df6  32.Re3  Dh6+  33.f4  Dh3+  34.Rd2  Dh7  35.Rd3  Rb6  36.De5  Rb7  37.Dd5+  Rb8  38.Dxa5  Rb7  39.Db5+  Rc7
    54/102+	17:17	 14.676.200k	14.150k	+3,78	1.Dd4  Rg8  2.Txf6
    54/102	17:58	 15.282.217k	14.171k	+3,72	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7  7.h6  Dd4  8.f3  Dd2+
    55/102+	19:20	 16.479.739k	14.200k	+3,78	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7
    55/102	20:02	 17.093.505k	14.210k	+3,78	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7  7.h6  Dd4  8.f3  Dd2+
    56/102+	23:28	 20.047.357k	14.237k	+3,84	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8
    56/102-	24:22	 20.777.560k	14.207k	+3,72	1.Dd4  Rg8  2.Txf6  gxf6
    56/102-	26:50	 22.522.178k	13.988k	+3,63	1.Dd4  Rg8  2.Txf6
    56/102-	27:26	 23.034.469k	13.989k	+3,52	1.Dd4  Rg8  2.Txf6  gxf6
    56/102-	28:57	 24.168.359k	13.908k	+3,36	1.Dd4  Rg8  2.Txf6  gxf6

Code: Select all

 1 Rfx6                 
    Coup cherché: Td6xf6
    Meilleur coup (Stockfish_syzygy_14102612_x64_modern): De5-d4
    Non trouvé dans: 12:00
...
    49/106+	07:34	  5.916.571k	13.026k	+2,92	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7
    49/106	07:55	  6.235.653k	13.110k	+3,08	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7
    50/106+	08:18	  6.564.709k	13.166k	+3,15	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7
    50/106-	08:28	  6.692.612k	13.171k	+3,02	1.Dd4  Rg8  2.Txf6  gxf6
    50/106-	08:35	  6.796.919k	13.181k	+2,94	1.Dd4  Rg8  2.Txf6  gxf6
    50/106-	09:03	  7.193.109k	13.247k	+2,82	1.Dd4  Dc7  2.Txf6
    50/106-	09:11	  7.310.851k	13.251k	+2,66	1.Dd4  Dc7  2.Txf6
    50/106-	09:27	  7.520.419k	13.258k	+2,44	1.Dd4  Dc7  2.Txf6  gxf6
    50/106-	10:16	  8.168.026k	13.254k	+2,15	1.Dd4  Dc7  2.Txf6  gxf6
   09/11/14 02:37:15, Durée pour cette analyse: 00:12:00, Temps fixé: 12:00

Code: Select all

 1 Rxf6                 
    Coup cherché: Td6xf6
    Meilleur coup (Stockfish_syzygy_14102612_x64_modern): De5-d4
    Non trouvé dans: 12:00
...
  44/83-	02:05	  1.456.676k	11.604k	+2,79	1.Dd4  Dc7  2.Txf6  gxf6
    44/83-	02:07	  1.480.106k	11.614k	+2,67	1.Dd4  Dc7  2.Txf6  gxf6  3.Dxf6+
    44/83-	02:13	  1.548.967k	11.637k	+2,29	1.Dd4  Dc7  2.Txf6  gxf6  3.Dxf6+
    44/83-	02:18	  1.626.757k	11.718k	+2,00	1.Dd4  Dc7  2.Txf6  gxf6  3.Dxf6+  Rg8
   10/11/14 02:36:19, Durée pour cette analyse: 00:12:00, Temps fixé: 12:00

Code: Select all

    Coup cherché: Td6xf6
    Meilleur coup (Stockfish_syzygy_14102612_x64_modern): De5-d4
    Non trouvé dans: 06:00
...
    46/97	03:12	  2.659.975k	13.790k	+2,90	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7  7.h6  Dd4  8.f3  Dd2+  9.Rh3  Dd1  10.Dg7+  Re7  11.Dg2  Dd3  12.Dg5+  f6  13.Dg7+  Re6  14.Rg3  Dd4  15.Db7  Dg1+  16.Rh3  Dg6  17.h7  Dh6+  18.Rg2  Dg6+  19.Rf1  Db1+  20.Rf2  Dc2+  21.Rf1
    47/97-	03:43	  3.040.017k	13.612k	+2,84	1.Dd4  Rg8  2.Txf6  gxf6
    47/97-	03:50	  3.135.370k	13.580k	+2,78	1.Dd4  Rg8  2.Txf6  gxf6
    47/97-	04:10	  3.355.202k	13.400k	+2,58	1.Dd4  Rg8  2.Txf6  gxf6
    47/97-	04:38	  3.652.236k	13.115k	+2,42	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6
    47/97-	05:06	  3.978.945k	12.982k	+2,20	1.Dd4  Rg8  2.Txf6  gxf6
    47/97-	05:21	  4.167.970k	12.960k	+1,90	1.Dd4  Rg8  2.Txf6  gxf6
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Stockfish finds some old vey hard positions

Post by Vinvin »

Vinvin wrote:Here are some positions hard for SF (there still about 5 to check to be sure there's only 1 clear best move).

1q1r3k/3P1pp1/ppBR1n1p/4Q2P/P4P2/8/5PK1/8 w - - bm Rxf6
1r1rb1k1/5ppp/4p3/1p1p3P/1q2P2Q/pN3P2/PPP4P/1K1R2R1 w - - bm Rxg7!!
1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - - bm Rxb3!!
1rb4k/p5np/3p1rp1/1ppB4/2N2P2/1P2R1P1/P1P4P/4R1K1 w - - bm Re8
1rr3k1/3b1pq1/4p2p/1n1pP2P/2P2QP1/1p6/1P6/1K1RNB1R b - bm Nc3
2b1r3/r2ppN2/8/1p1p1k2/pP1P4/2P3R1/PP3PP1/2K5 w - - bm Nd6!!
2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - am Nxb6+?
2k5/p7/Pp1p1b2/1P1P1p2/2P2P1p/3K3P/5B2/8 w - - bm c5
2r5/prkpR1p1/2p1ppK1/P1p1N1B1/P1P1P3/8/8/8 w - - bm Bf4
3Q4/3p4/P2p4/N2b4/8/4P3/5p1p/5Kbk w - - bm Qa8!!
4R3/P7/2bB2p1/r3pk2/2p2p1P/2P2P1K/6P1/8 w - - bm Rxe5+
4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - bm Qxe5!!
5k2/4bp2/2B3p1/1P4p1/3R4/3P2PP/2r2PK1/8 b - - bm Rxf2+; c0 "Uhlmann-Malich,Berlin 1968"; fmvn 53; hmvc 0; id "Nightmare Nr.021";
5kN1/3p1q2/5P2/5PP1/2pK4/1p1R4/1P6/8 w - - bm Rxb3
7r/p3k3/2p5/1pPp4/3P4/PP4P1/3P1PB1/2K5 w - - bm Kd1
8/1p2b3/6k1/5p2/p2NbP1p/P1B1P1p1/1P5P/6K1 w - - bm h3!
8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - - bm Be2!
8/4nk2/1p3p2/2rp2pp/1P1R1N1P/6P1/3KPP2/8 b - - am Rb5?
8/6pp/1K6/N5P1/3N4/8/npn1P3/k7 w - - bm Nab3+; c0 "Lommer 1963"; fmvn 1; hmvc 0;id "Nightmare Nr.020";
8/8/8/2pK3p/8/5N2/1P4pq/5Rbk w - - bm Rb1!!
8/8/8/3k2p1/4p3/2b1P1pP/4KNP1/8 w - - bm Nxe4!!
k7/p1pR4/1p3p2/2P2rpB/PbP4p/2N1p2p/KP6/8 w - - bm Bf3!!
n2Bqk2/5p1p/Q4KP1/p7/8/8/8/8 w - - bm Qc8!!
r1b1r2k/pp1n1pp1/1qpb3p/8/3PB2B/5N2/PPQ2PPP/R3R1K1 w - - Bg6!!
r1b2rk1/1pq2ppp/p1p1p3/2n1P3/2N2P2/3B4/PPP3PP/R2Q1RK1 w - - Bxh7!
r1b2rk1/2q1bppp/p2pp3/2n3PQ/1p1BP3/1BN5/PPP2P1P/2KR2R1 w - - bm Bf6
r1b3r1/3kb1pp/2qp4/p2Nn1P1/3BP2P/4Q3/1PP2R2/1K1R4 b - - am Ng4?
r1bqn1nk/ppp4p/3p4/3Pp1r1/2P1Pp2/2NB1P2/PP2N3/2K1Q1RR w - - bm Rxh7
r1q1rbk1/2pp1ppp/p1b5/1p1NP3/3Q4/3R2B1/PPP2PPP/5RK1 w - - bm Nf6!!
r2q1r2/1b2bpkp/p3p1p1/2ppP1P1/7R/1PN1BQR1/1PP2P1P/4K3 w - - bm Qf6+; c0 "Asauskas-Malisauskas, Vilnius 2004"; fmvn 19; hmvc 0; id "Nightmare Nr.019";
r2q1rk1/ppp2p2/3p1np1/4pNQ1/4P1pP/1PPP4/1P3P2/R3K1R1 w Q - bm Qh6
r5k1/6b1/2Nq4/2pP1p2/p1P1pPr1/Pp6/3R2PQ/1K3R2 b - - bm e3
r5n1/p1p1q2k/4b2p/3pB3/3PP1pP/8/PPPQ2P1/5RK1 w - - bm Qf4
rnbRrk2/2p5/1p2PB1p/pP4p1/8/P3R2P/2P2P2/6K1 w - - bm h4
Here's the result after a night of analysis, 12 min per position.
9 on 34 found. #23 (Qc8) is sometimes found fast by luck.

Code: Select all

  1) Td6xf6             De5-d4   
  2) Tg1xg7             Td1-d4   
  3) .. Tb8xb3          Ta6-a8   
  4) Te3-e8             Cc4-d2   
  5) .. Cb5-c3          Tb8-a8   
  6) Cf7-d6             Cf7-h6   
  7) Ca4xb6(?)          Ca4xb6   
  8) c4-c5              c4-c5   * 88 Secondes
  9) Fg5-f4             Te7xd7   
 10) Dd8-a8             Dd8-f6   
 11) Te8xe5             Te8-e7   
 12) Dd6xe5             Dd6-a3   
 13) .. Tc2xf2          Tc2xf2  * 167 Secondes
 14) Td3xb3             Td3xb3  * 218 Secondes
 15) Rc1-d1             Fg2-f3   
 16) h2-h3              Fc3-e1   
 17) Fc4-e2             Fc4-f1   
 18) .. Tc5-b5(?)       Tc5-b5   
 19) Ca5-b3             Cd4xc2   
 20) Tf1-b1             Tf1-d1   
 21) Cf2xe4             Cf2-g4   
 22) Fh5-f3             Cc3-b5   
 23) Da6-c8             Da6-c8  * 1 Seconde
 24) Fe4-g6             Fe4-d3   
 25) Fd3xh7+            Tf1-f3   
 26) Fd4-f6             Dh5-h6   
 27) .. Ce5-g4(?)       Ce5-g4   
 28) Th1xh7             Th1xh7  * 436 Secondes
 29) Cd5-f6             Tf1-d1   
 30) Df3-f6             Df3-f6  * 219 Secondes
 31) Dg5-h6             O-O-O    
 32) .. e4-e3           e4-e3   * 545 Secondes
 33) Dd2-f4             Dd2-f4  * 503 Secondes
 34) h3-h4              h3-h4   * 151 Secondes
9 sur 34 coups trouvés
10/11/14 09:12:58, Durée totale: 06:48:42 Temps fixé: 5:38:48 = 20328 Secondes
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Stockfish finds some old vey hard positions

Post by zullil »

Vinvin wrote:Sometimes Stockfish find Rxf6 fast by luck.
I've 4 run on an i7, 6 cores@4GHz where it doesn't find it.
Not found in 30 min, 12 min, 12 min and 6 min.
Stockfish always want to play Qd4. But when Rxf6 is played on the board, it see in a couple of seconds a score > 50.
Please, retest it 3 or 4 times.

Code: Select all

 2 Rfx6                 
    Coup cherché: Td6xf6
    Meilleur coup (Stockfish_syzygy_14102612_x64_modern): De5-d4
    Non trouvé dans: 30:00
...
    53/98+	14:35	 12.325.040k	14.073k	+3,59	1.Dd4  Rg8  2.Txf6
    53/102+	15:38	 13.256.257k	14.119k	+3,81	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7
    53/102	16:08	 13.691.518k	14.135k	+3,72	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7  7.h6  Dd4  8.f3  Dd2+  9.Rh3  Dd1  10.Dg7+  Re7  11.Dg2  Dd3  12.Dg5+  f6  13.Dg7+  Re6  14.Rg3  Dd4  15.Db7  Dg1+  16.Rh4  Dh1+  17.Rg4  Dxh6  18.Dxb6+  Rd5  19.Da5+  Rd4  20.Db4+  Re3  21.De1+  Rd4  22.De4+  Rc5  23.Rf5  a5  24.Re6  f5+  25.Rxf5  Df8+  26.Rg4  Dg8+  27.Rh4  Dd8+  28.Rh3  Dc8+  29.f5  Dh8+  30.Rg3  Dg7+  31.Rf2  Df6  32.Re3  Dh6+  33.f4  Dh3+  34.Rd2  Dh7  35.Rd3  Rb6  36.De5  Rb7  37.Dd5+  Rb8  38.Dxa5  Rb7  39.Db5+  Rc7
    54/102+	17:17	 14.676.200k	14.150k	+3,78	1.Dd4  Rg8  2.Txf6
    54/102	17:58	 15.282.217k	14.171k	+3,72	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7  7.h6  Dd4  8.f3  Dd2+
    55/102+	19:20	 16.479.739k	14.200k	+3,78	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7
    55/102	20:02	 17.093.505k	14.210k	+3,78	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7  7.h6  Dd4  8.f3  Dd2+
    56/102+	23:28	 20.047.357k	14.237k	+3,84	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8
    56/102-	24:22	 20.777.560k	14.207k	+3,72	1.Dd4  Rg8  2.Txf6  gxf6
    56/102-	26:50	 22.522.178k	13.988k	+3,63	1.Dd4  Rg8  2.Txf6
    56/102-	27:26	 23.034.469k	13.989k	+3,52	1.Dd4  Rg8  2.Txf6  gxf6
    56/102-	28:57	 24.168.359k	13.908k	+3,36	1.Dd4  Rg8  2.Txf6  gxf6

Code: Select all

 1 Rfx6                 
    Coup cherché: Td6xf6
    Meilleur coup (Stockfish_syzygy_14102612_x64_modern): De5-d4
    Non trouvé dans: 12:00
...
    49/106+	07:34	  5.916.571k	13.026k	+2,92	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7
    49/106	07:55	  6.235.653k	13.110k	+3,08	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7
    50/106+	08:18	  6.564.709k	13.166k	+3,15	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7
    50/106-	08:28	  6.692.612k	13.171k	+3,02	1.Dd4  Rg8  2.Txf6  gxf6
    50/106-	08:35	  6.796.919k	13.181k	+2,94	1.Dd4  Rg8  2.Txf6  gxf6
    50/106-	09:03	  7.193.109k	13.247k	+2,82	1.Dd4  Dc7  2.Txf6
    50/106-	09:11	  7.310.851k	13.251k	+2,66	1.Dd4  Dc7  2.Txf6
    50/106-	09:27	  7.520.419k	13.258k	+2,44	1.Dd4  Dc7  2.Txf6  gxf6
    50/106-	10:16	  8.168.026k	13.254k	+2,15	1.Dd4  Dc7  2.Txf6  gxf6
   09/11/14 02:37:15, Durée pour cette analyse: 00:12:00, Temps fixé: 12:00

Code: Select all

 1 Rxf6                 
    Coup cherché: Td6xf6
    Meilleur coup (Stockfish_syzygy_14102612_x64_modern): De5-d4
    Non trouvé dans: 12:00
...
  44/83-	02:05	  1.456.676k	11.604k	+2,79	1.Dd4  Dc7  2.Txf6  gxf6
    44/83-	02:07	  1.480.106k	11.614k	+2,67	1.Dd4  Dc7  2.Txf6  gxf6  3.Dxf6+
    44/83-	02:13	  1.548.967k	11.637k	+2,29	1.Dd4  Dc7  2.Txf6  gxf6  3.Dxf6+
    44/83-	02:18	  1.626.757k	11.718k	+2,00	1.Dd4  Dc7  2.Txf6  gxf6  3.Dxf6+  Rg8
   10/11/14 02:36:19, Durée pour cette analyse: 00:12:00, Temps fixé: 12:00

Code: Select all

    Coup cherché: Td6xf6
    Meilleur coup (Stockfish_syzygy_14102612_x64_modern): De5-d4
    Non trouvé dans: 06:00
...
    46/97	03:12	  2.659.975k	13.790k	+2,90	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6  Dc7  4.Dxh6  Txd7  5.Dg5+  Rf8  6.Fxd7  Dxd7  7.h6  Dd4  8.f3  Dd2+  9.Rh3  Dd1  10.Dg7+  Re7  11.Dg2  Dd3  12.Dg5+  f6  13.Dg7+  Re6  14.Rg3  Dd4  15.Db7  Dg1+  16.Rh3  Dg6  17.h7  Dh6+  18.Rg2  Dg6+  19.Rf1  Db1+  20.Rf2  Dc2+  21.Rf1
    47/97-	03:43	  3.040.017k	13.612k	+2,84	1.Dd4  Rg8  2.Txf6  gxf6
    47/97-	03:50	  3.135.370k	13.580k	+2,78	1.Dd4  Rg8  2.Txf6  gxf6
    47/97-	04:10	  3.355.202k	13.400k	+2,58	1.Dd4  Rg8  2.Txf6  gxf6
    47/97-	04:38	  3.652.236k	13.115k	+2,42	1.Dd4  Rg8  2.Txf6  gxf6  3.Dxf6
    47/97-	05:06	  3.978.945k	12.982k	+2,20	1.Dd4  Rg8  2.Txf6  gxf6
    47/97-	05:21	  4.167.970k	12.960k	+1,90	1.Dd4  Rg8  2.Txf6  gxf6
I ran three more searches. Two I stopped at about 20 minutes; one found the best move in about 16 minutes. So my first search seems to be lucky, as you said.
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Vinvin
Posts: 5228
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Stockfish finds some old vey hard positions

Post by Vinvin »

Update 1.5 year later.
Stockfish_160626_x64_modern_fast , Intel 4930K, 6*4 GHz, 1h per position
Analyzing engine: Stockfish_160626_x64_modern_fast

1) .. Bf5-h3 Bf5-h3 * 650 Seconds
5) .. Bf5-h3 Bf5-h3 * 327 Seconds
9) .. Bf5-h3 Bf5-h3 * 184 Seconds
13) .. Bf5-h3 Bf5-h3 * 2522 Seconds

2) Ne3-g2 g3xh4 - not found
6) Ne3-g2 g3xh4 - not found
10) Ne3-g2 g3xh4 - not found
14) Ne3-g2 g3xh4 - not found

3) Ng4-f6 Ng4xe3 - not found
7) Ng4-f6 Ng4xe3 - not found
11) Ng4-f6 d7-d8Q - not found

Vinvin wrote:Intel 4930K, 6 cores 3.4 ghz

Shirov's Bh3!!! after 18min45
Karpov - Kasparov : Ng2!!! after 3h40m
Georgian peasant : Nf6+!!! after 1h18m
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