Author: Robin Smith
Date: 22:18:26 01/06/06
Go up one level in this thread
On January 06, 2006 at 19:51:22, Vincent Lejeune wrote: >On January 06, 2006 at 19:07:39, Robin Smith wrote: > >>On January 06, 2006 at 05:37:44, Vincent Lejeune wrote: >> >>> >>>BTW, I prepare some other very hard test positions mainly from CCC archives. >>>I've about 25 positions now , I'll post them next week. >>> >>>May be Rybka Winfinder will show some surprising results here... >> >>Here is another position for your database. >>[D] r1qr2k1/pb2bpp1/1p2p2p/2p4n/3P1B2/2PB1N2/PP2QPP1/1K1R2R1 w - - 0 16 bm >>16.Bxh6 >> >>This is from a correspondence game I played many years ago. It would be >>interesting to see how programs do today, but when I tried Rybka Winfinder on it >>using my 2 year old laptop it still was not solved after several hours. The >>position 1 move earlier is absurdly hard for computers. >> >>-Robin > >AMD 32 bit @ 2.1 Ghz > >Hiarcs 10 seems very fast (compared to several hours for Rybka ;) ). > >Analysis by Hiarcs 10: >... >1.Fe5 > µ (-0.71) Profondeur: 9/27 00:00:01 320kN >1.Fe5 Cf6 2.Th1 cxd4 3.Fxd4 Dd7 4.Dd2 Ce4 5.De3 > ³ (-0.65) Profondeur: 9/27 00:00:02 382kN >1.Fe5 Cf6 2.Th1 Dc6 3.Dd2 c4 > ³ (-0.67) Profondeur: 10/27 00:00:04 764kN >1.Fe5 Cf6 2.g4 c4 3.Fc2 > ³ (-0.48) Profondeur: 11/30 00:00:10 1951kN >1.Fe5 Dc6 2.Dc2 Cf6 3.Fxf6 Fxf6 4.Ce5 Fxe5 5.dxe5 Dc7 6.Fh7+ Rf8 7.f4 > ³ (-0.52) Profondeur: 12/34 00:00:23 4343kN >1.Fe5 Cf6 2.g4 Ce8 3.Ff4 Cd6 4.Tde1 Dc6 5.Ce5 Dd5 6.De3 > ³ (-0.38) Profondeur: 13/37 00:01:10 12721kN >1.Fxh6 > ³ (-0.37) Profondeur: 13/39 00:02:10 24089kN >1.Fxh6 > ³ (-0.27) Profondeur: 13/39 00:02:24 26196kN >1.Fxh6 gxh6 2.De3 Fg5 3.Cxg5 hxg5 4.Dxg5+ Cg7 5.Th1 f5 6.Dg6 cxd4 7.cxd4 Txd4 > ² (0.52) Profondeur: 13/39 00:03:14 34569kN >1.Fxh6 > ² (0.27) Profondeur: 14/39 00:03:42 40487kN >1.Fxh6 gxh6 2.De3 Rg7 3.Th1 cxd4 4.De5+ Cf6 5.Dg3+ Rf8 6.Txh6 Re8 7.Ce5 Fd6 >8.Txf6 Fxe5 9.Dxe5 > = (0.12) Profondeur: 14/39 00:04:33 49924kN >1.Fxh6 gxh6 2.De3 Rg7 3.Th1 Fxf3 4.Dxf3 cxd4 5.Dxh5 Fg5 6.cxd4 Txd4 7.g4 Dd8 >8.Fc2 Txd1+ > = (0.07) Profondeur: 15/44 00:08:08 92972kN >1.Fxh6 gxh6 2.De3 Rg7 3.Th1 Fxf3 4.Dxf3 cxd4 5.Dxh5 Fg5 6.f4 Fxf4 7.Tdf1 Td5 >8.Df3 > ² (0.31) Profondeur: 16/47 00:15:35 184625kN Very impressive of Hiarcs! The scores are staying pretty low, though, considering that Bxh6 wins by force. But still, finding the best move is finding the best move regardless of what the evaluation says. What does Hiarcs 10 play one move earlier? [D] r1qr2k1/pb2bpp1/1p2pn1p/2p4P/3P1B2/2PB1N2/PP2QPP1/1K1R3R w - - 0 15 bm 15.Rhg1 I still believe this is the best move here, in part because 15...Nxh5 definitely loses and other moves lead, at least, to a slight white advantage. However rigorously proving that 15.Rhg1 is best is hard to do, and no program I have tried has ever found it. -Robin
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