Author: Robin Smith
Date: 22:57:47 01/07/06
Go up one level in this thread
On January 07, 2006 at 03:35:00, Uri Blass wrote: >On January 07, 2006 at 03:24:37, Uri Blass 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 >> >>I do not have rybka winfinder but maybe rybka slightly positional is better >>here. >> >>with 512 mbytes hash >>After more than 30 minutes of analysis it considers Bxh6 at least in the last 12 >>minutes(it does not choose this move but I see it in the analysis window for a >>long time) >> >>New game >>[D]r1qr2k1/pb2bpp1/1p2p2p/2p4n/3P1B2/2PB1N2/PP2QPP1/1K1R2R1 w - - 0 1 >> >>Analysis by Rybka 1.0 Beta 32-bit: >> >>1.Bd2 >> = (0.05) Depth: 3 00:00:00 >>1.Bd2 >> = (-0.12) Depth: 4 00:00:00 >>1.Be3 >> = (-0.04) Depth: 4 00:00:00 >>1.Be3 Nf6 >> = (0.01) Depth: 5 00:00:00 >>1.Be3 Nf6 2.Ne5 >> = (0.00) Depth: 6 00:00:00 11kN >>1.Be3 Qc7 2.Ne5 Nf6 >> = (-0.14) Depth: 7 00:00:00 27kN >>1.Be3 Qc7 2.Ne5 Nf6 3.Rh1 >> = (-0.19) Depth: 8 00:00:01 61kN >>1.Bd2 Qc7 2.Ne5 Nf6 3.dxc5 >> = (-0.06) Depth: 8 00:00:02 107kN >>1.Bd2 Qc7 2.Ne5 Nf6 3.Bf4 cxd4 >> = (-0.24) Depth: 9 00:00:02 155kN >>1.Be3 Qc7 2.g3 Nf6 3.dxc5 bxc5 4.Bf4 >> = (-0.22) Depth: 9 00:00:03 191kN >>1.Be5 Nf6 2.g4 Nd7 3.Bf4 Qc6 >> = (-0.16) Depth: 9 00:00:05 268kN >>1.Be5 Nf6 2.g4 Nd5 3.Rh1 Qc6 4.Rh3 >> = (-0.20) Depth: 10 00:00:10 502kN >>1.Bh2 Nf6 2.g4 Bxf3 3.Qxf3 cxd4 4.cxd4 Nd5 5.Be5 >> = (-0.08) Depth: 10 00:00:15 741kN >>1.Bh2 Nf6 2.g4 Bxf3 3.Qxf3 cxd4 4.cxd4 Nd5 5.Qe4 g6 >> = (-0.13) Depth: 11 00:00:17 869kN >>1.Bh2 Nf6 2.g4 Bxf3 3.Qxf3 cxd4 4.cxd4 Nd5 5.Qe4 g6 >> = (-0.16) Depth: 12 00:00:26 1336kN >>1.Be5 Nf6 2.g4 Nd7 3.Bf4 Qc6 4.Rg3 c4 5.Bxc4 >> = (-0.05) Depth: 12 00:00:52 2477kN >>1.Be5 Qc6 2.Rh1 Nf6 3.Rh4 a5 4.Bb5 Qc8 5.Bd3 Bd5 >> = (-0.11) Depth: 13 00:01:37 4695kN >>1.Be5 Qc6 2.Nd2 Nf6 3.dxc5 bxc5 4.Bb5 Qb6 5.Bd3 Bd5 >> = (-0.17) Depth: 14 00:03:14 9335kN >>1.Bh2 Nf6 2.g4 Bxf3 3.Qxf3 cxd4 4.cxd4 Nd5 5.Qe4 g6 >> = (-0.02) Depth: 14 00:04:30 12834kN >>1.Bh2 Nf6 2.g4 Bxf3 3.Qxf3 cxd4 4.cxd4 Nd5 5.Qe4 g6 >> = (-0.13) Depth: 15 00:05:49 16231kN >>1.Bh2 Nf6 2.g4 cxd4 3.Nxd4 Nd5 4.Be5 Bg5 5.Be4 Nf4 >> = (-0.12) Depth: 16 00:09:48 27110kN >> >>(, 07.01.2006) > > >As I predicted >I get the following line > >1.Bxh6 cxd4 2.Nxd4 Nf6 3.Bf4 > ± (0.75) Depth: 16 00:39:24 97218kN > >(, 07.01.2006) > >I do not have rybka win finder but it is probably slower based on Robin Smith's >post > >Uri Actually I'm not sure WinFinder will be slower; at the present time I only have access to a somewhat old laptop. Your machine is undoubtedly faster. The other thing is that I used default WinFinder settings. If I used a smaller threshold to define a "win" I think WinFinder would be quicker ... WinFinder pauses for very long times on Bxh6, without ever selecting it, for several plies. -Robin
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