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Up Topic The Rybka Lounge / Test Positions / Which engine can find this in less than 1 hour
- - By Fishpov (**) [fr] Date 2015-12-28 15:33
Which engine is able to find this move  in less than 1 hour ?
Bg6 !
r1b3k1/ppp1q1pp/2n1p3/3pP2P/8/2NB2Q1/PPP3P1/2K2R2 w - - 0 19
Parent - - By BOND 007 (*) [at] Date 2015-12-28 18:59
no Problem........

r1b3k1/ppp1q1pp/2n1p3/3pP2P/8/2NB2Q1/PPP3P1/2K2R2 w - - 0 1


Analysis by Stockfish 6 64 POPCNT:

1.Kb1 h6 2.a3 Dg5 3.Dxg5 hxg5 4.Sb5
  =  (0.30)   Tiefe: 7/7   00:00:00  5kN
1.Df4 a5 2.Sb5 Sb4 3.Le2 Ld7 4.a3 Lxb5 5.Lxb5
  =  (0.24)   Tiefe: 8/9   00:00:00  20kN
  =  (0.00)   Tiefe: 9/10   00:00:00  57kN
1.a3 b6 2.Kb1 Lb7 3.h6 Kh8 4.hxg7+ Dxg7 5.Dxg7+ Kxg7 6.Sb5 Tf8 7.Txf8 Kxf8 8.Sxc7 Sxe5
  =  (-0.08)   Tiefe: 10/14   00:00:00  108kN
  =  (-0.08)   Tiefe: 11/15   00:00:00  142kN
1.Kb1 a6 2.a3 Ld7 3.Df4 Kh8 4.Se2 h6 5.c3 a5 6.Lg6 Tc8 7.g4 b6 8.Sd4
  =  (-0.03)   Tiefe: 12/16   00:00:00  232kN
  =  (-0.05)   Tiefe: 14/17   00:00:00  443kN
1.a3 Ld7 2.Df4 h6 3.Kb1 a6 4.g3 Tb8 5.Sa2 Kh8 6.g4 Kg8 7.b3 Ta8 8.Kb2 b5 9.c3 Tf8 10.Lh7+ Kxh7 11.Dxf8 Dxf8 12.Txf8
  =  (-0.12)   Tiefe: 15/25   00:00:00  1443kN
  =  (-0.27)   Tiefe: 21/31   00:00:01  9921kN
1.Sb5 Ld7
  =/+  (-0.31)   Tiefe: 22/32   00:00:02  17695kN
  =/+  (-0.41 --)   Tiefe: 28/48   00:00:12  131MN
1.a3
  =/+  (-0.35 ++)   Tiefe: 28/48   00:00:13  145MN
1.Tf3 Ld7
  =  (-0.25 ++)   Tiefe: 28/48   00:00:15  171MN
  =  (-0.17 --)   Tiefe: 32/54   00:00:27  315MN
1.Lg6!! Sd8 2.Se2 Ld7 3.Sf4 Sf7 4.Sxd5 Dg5+ 5.Dxg5 Sxg5 6.Se7+ Kh8 7.Tf4 c5 8.a4 Tb8 9.b3 b6 10.Tg4 h6 11.Tg3 Sh7 12.Td3 Sf8 13.c4 Le8 14.Lxe8 Txe8 15.Sc6 a5 16.Td6 g6 17.g4 Sh7 18.Sa7 Sf8 19.Kc2 Kg7 20.Txb6 gxh5 21.gxh5 Sd7 22.Tb7 Te7 23.Sc6 Tf7 24.Sd8
  =  (-0.10 ++)   Tiefe: 32/54   00:00:32  371MN
  +/-  (1.33)   Tiefe: 42/62   00:05:46  4466MN
Parent - - By Fishpov (**) [fr] Date 2015-12-29 00:04
Yes I have tried with Stockfish 6 64 POPCNT
and this engine is able to find Bg6 but not always ! this seems to be aleatory. (could you remove live book panel and clear hash table ?)
I we clear the hash table and go again the solution is not found.
And Houdini, Komodo, Rybka ?

Thanks.
Parent - By BOND 007 (*) [at] Date 2015-12-29 17:32
and with clear hash tables....

r1b3k1/ppp1q1pp/2n1p3/3pP2P/8/2NB2Q1/PPP3P1/2K2R2 w - - 0 1


Analysis by Stockfish 6 64 POPCNT:

1.Kb1 h6 2.a3 b6 3.Se2 Dg5 4.Dxg5
  =  (0.03)   Tiefe: 7/8   00:00:00  7kN
1.Df4 a6 2.Kb1 Ld7 3.g4 Kh8 4.a3 h6
  =  (-0.06)   Tiefe: 8/10   00:00:00  23kN
1.Kb1 Ld7 2.a3 Tc8 3.Df4 Kh8 4.g4 h6 5.Se2 Dg5 6.Dxg5
  =  (-0.10)   Tiefe: 9/12   00:00:00  36kN
  =  (-0.03)   Tiefe: 10/16   00:00:00  66kN
1.Df4 Ld7 2.a3 h6 3.Kb1 Kh8 4.g4 Tg8 5.Lb5 Td8 6.Se2 Dc5 7.Ld3 a6
  =  (-0.06)   Tiefe: 11/16   00:00:00  93kN
  =  (-0.11)   Tiefe: 12/16   00:00:00  122kN
1.a3 Ld7 2.h6 Kh8 3.Sb5 Tg8 4.hxg7+ Txg7 5.De3 Le8 6.Sxa7 Sxa7 7.Dxa7 c5 8.Tf6 Txg2 9.Db8 Tg1+ 10.Kd2 c4 11.Le2 Kg7 12.Dc8 Tg2 13.Dxe6 Dxe6 14.Txe6
  =  (-0.18)   Tiefe: 13/18   00:00:00  252kN
  =  (-0.19)   Tiefe: 24/46   00:00:03  35614kN
1.Sb5 Ld7 2.Sxc7 Tf8 3.Txf8+ Dxf8 4.Sb5 Sb4 5.Sd6 Sxa2+ 6.Kb1 Sb4 7.Le2 h6 8.c3 Sc6 9.Ld3 Le8 10.Le2 b6 11.Lb5 Ld7 12.Kc2 De7 13.b3 Sd8 14.Ld3 Dg5 15.Dxg5 hxg5 16.g4
  =  (-0.25 ++)   Tiefe: 25/46   00:00:03  43575kN
  =/+  (-0.35)   Tiefe: 25/46   00:00:03  46903kN
1.a3
  =  (-0.29 ++)   Tiefe: 26/46   00:00:04  57639kN
  =  (-0.13 ++)   Tiefe: 35/47   00:00:49  853MN
1.Lg6! h6 2.Sb5 Dg5+ 3.Dxg5 hxg5 4.Sxc7 Tb8 5.Lf7+ Kh7 6.Sxe6 Lxe6 7.Lxe6 Kh6 8.Lxd5 Sxe5 9.Tf5 Te8 10.Lxb7 Kxh5 11.Ld5 Kg4 12.Tf1 Te7 13.Td1 Sg6 14.c4 Sf4 15.Kc2 Kg3 16.Kc3 Te3+ 17.Kd4 Te2 18.c5 Sxd5 19.Kxd5 Txb2 20.c6 Txg2 21.c7 Tc2 22.Kd6 Kf4 23.Tf1+ Ke4 24.a3
  =  (0.06 ++)   Tiefe: 35/53   00:01:03 1109MN
  +/-  (1.30)   Tiefe: 42/71   00:05:33  6314MN

r1b3k1/ppp1q1pp/2n1p3/3pP2P/8/2NB2Q1/PPP3P1/2K2R2 w - - 0 1


Analysis by Critter 1.5.38 64-bit:

1.Kb1 Sb4 2.Sb5 Sxd3 3.Dxd3 b6 4.h6 g6
  +/=  (0.55)   Tiefe: 7/10   00:00:00  6kN
  +/=  (0.46 --)   Tiefe: 8/14   00:00:00  20kN
1.a3 Ld7 2.Df4 Le8 3.g4 g5 4.Dg3 Ld7 5.Tf6 Tf8 6.Kb1 Dg7 7.h6 De7 8.Sb5 a6 9.Txf8+ Dxf8 10.Sxc7 Dxh6
  +/=  (0.37)   Tiefe: 8/14   00:00:00  23kN
  =  (-0.18)   Tiefe: 13/35   00:00:00  4015kN
1.Sb5 Ld7 2.Sxc7 Tf8 3.Txf8+ Dxf8 4.Sb5 Le8 5.h6 g6 6.Dg5 Sb4 7.Sd6 Sxa2+ 8.Kb1 Sb4 9.Le2 Sc6 10.De3 Ld7 11.c3 b6 12.Lb5 Sb8 13.Ld3 Sc6 14.Lb5
  =  (0.00)   Tiefe: 13/35   00:00:01  4777kN
  =  (0.00)   Tiefe: 28/66   00:05:16  7705MN
1.Lg6! hxg6 2.hxg6 Sd4 3.Tf7 Dd8 4.Dg4 Sf5 5.Dh5 Sh6 6.g4 De8 7.Tf1 c6 8.Se2 Ld7 9.Sf4 Db8 10.g5 Sf5 11.Sd3 b6 12.Dh7+ Kf8 13.Txf5+ exf5 14.Dh8+ Ke7 15.Dxg7+ Kd8 16.Df8+ Kc7
  =  (0.08 ++)   Tiefe: 28/72   00:15:24  22067MN
  +/=  (0.40 ++)   Tiefe: 28/72   00:21:14  29535MN

r1b3k1/ppp1q1pp/2n1p3/3pP2P/8/2NB2Q1/PPP3P1/2K2R2 w - - 0 1


Analysis by Houdini 4 Pro x64:

1.Kb1 Ld7 2.Sb5 Tf8 3.Sxc7 Txf1+ 4.Lxf1 Dd8 5.Sb5
  +/=  (0.45)   Tiefe: 7/15   00:00:00  5kN
  =  (0.14)   Tiefe: 8/18   00:00:00  27kN
1.a3 Ld7
  =  (0.00)   Tiefe: 9/24   00:00:00  110kN
  =  (-0.07 --)   Tiefe: 16/43   00:00:01  7154kN
1.Sb5 Ld7 2.Sxc7 Tf8 3.Txf8+ Dxf8 4.Sb5 Le8 5.h6 Sb4 6.Sd6 Sxd3+ 7.cxd3 Df1+ 8.Kd2 Lg6 9.Df3 Db1 10.hxg7 Dxb2+ 11.Kd1 Da1+ 12.Kd2 Dxa2+ 13.Ke3 d4+ 14.Kxd4 Db2+ 15.Kc4 Dc1+ 16.Kd4 Da1+ 17.Kc4 Da2+ 18.Kd4 Db2+
  =  (0.00)   Tiefe: 16/47   00:00:01  11960kN
  =  (0.00)   Tiefe: 29/81   00:11:16  13135MN, tb=349
1.Lg6! Sd8 2.Se2 h6 3.Sf4 Dg5 4.Dxg5 hxg5 5.Sh3 Ld7 6.Sxg5 Sc6 7.Lf7+ Kh8 8.Lxe6 Lxe6 9.Sxe6 Te8 10.Sxc7 Txe5 11.g4 Kh7 12.b3 d4 13.Tf7 Kh6 14.Td7 g6 15.hxg6 Kxg6 16.Td6+ Kf7 17.a4 Ke7 18.Th6 Tg5 19.Sb5 Txg4 20.Th7+ Ke6 21.Txb7 a5 22.Kb2 Tg2 23.Th7 Tf2 24.Th6+ Tf6 25.Th5 Tf5
  =  (0.07 ++)   Tiefe: 29/95   01:11:54  83254MN, tb=3007
  +/-  (0.85)   Tiefe: 29/95   01:16:37  88271MN, tb=5805
Parent - By Luigi335 (*) [it] Date 2016-01-01 10:41
If you want an engine that instantantly solves the position, try DeepFish MZ 5.2 ...

:smile:
- By michael82 [hu] Date 2016-01-25 19:40
Stockfish 7 64 POPCNT can find Bg6 after 50 minutes (plies 41) on 2 cores, until that, several other possibilities are evaluated equally to approx. 0.00, then, when deepened further:
plies 53 (+1.81) (2 days)
Bg6 h6 Nb5 Qg5+ Qxg5 hxg5 Nxc7 Rb8 Rf7 Nxe5 Re7 Bd7 Nxe6 Bxe6 Rxe6 Nc6 Kd2 Rc8 Re3 g4 Bf5 Rd8 Bxg4 Kf7 Rb3 b6 Rf3+ Ke7 Rf5 Rd6 Bh3 Nd4 Rg5 Kf7 a3 a5 Kd3 Nc6 Rf5+ Kg8 g4 g6 hxg6 Ne7 Rh5 Kg7 Rh7+ Kf8 Bg2 Rxg6 Bf3 Ke8 Ke3 Kd7
Up Topic The Rybka Lounge / Test Positions / Which engine can find this in less than 1 hour

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