Author: Steffen Jakob
Date: 23:00:20 02/07/03
Go up one level in this thread
On February 08, 2003 at 00:04:10, Robert Hyatt wrote: >On February 07, 2003 at 03:32:11, Dann Corbit wrote: > >>Can't find the original post. >> >>Someone said Ne3, Nf3 were the best moves. Looks pretty clear that a4 wins. >> >>[D]8/8/8/6Np/2N5/Pk6/6K1/8 w - a3 > >Here is something from an "authority". :) about 150 gigs of egtbs >on a set of disks that won't wait. :) > > 8 1.68 Mat26 1. Ne4 Kxc4 <EGTB> > 8-> 1.82 Mat26 1. Ne4 Kxc4 <EGTB> (s=8) > 9 2.45 Mat26 1. Ne4 Kxc4 <EGTB> (s=7) > 9-> 7.05 Mat26 1. Ne4 Kxc4 <EGTB> (s=7) > 10 7.29 Mat26 1. Ne4 Kxc4 <EGTB> (s=6) > 10-> 8.63 Mat26 1. Ne4 Kxc4 <EGTB> (s=7) > 11 9.43 Mat26 1. Ne4 Kxc4 <EGTB> (s=6) > 11-> 16.04 Mat26 1. Ne4 Kxc4 <EGTB> (s=7) > 12 17.02 Mat26 1. Ne4 Kxc4 <EGTB> (s=6) > 12-> 23.30 Mat26 1. Ne4 Kxc4 <EGTB> (s=4) > 13 24.09 Mat26 1. Ne4 Kxc4 <EGTB> (s=3) > 13-> 42.42 Mat26 1. Ne4 Kxc4 <EGTB> (s=5) > 14 42.51 Mat26 1. Ne4 Kxc4 <EGTB> (s=4) > 14-> 47.20 Mat26 1. Ne4 Kxc4 <EGTB> (s=4) > 15 47.28 Mat26 1. Ne4 Kxc4 <EGTB> (s=3) > 15-> 1:05 Mat26 1. Ne4 Kxc4 <EGTB> (s=5) > >A4 leads to a mate in 91 as the best black can do, according to >the same "authority". However, it would require a close inspection >to be sure it won't go past the 50 move rule... In Hossa I have a command which shows the full line to the mate if the root position is a tablebase position. It would be nice to have this in crafty, too (but don't send this line to xboard which would get an overflow). Greetings, Steffen. > > 13 3.14 Mat91 1. ... Kxa4 <EGTB> > 13-> 3.30 Mat91 1. ... Kxa4 <EGTB> > 14 3.30 Mat91 1. ... Kxa4 <EGTB> > 14-> 3.68 Mat91 1. ... Kxa4 <EGTB> > 15 3.68 Mat91 1. ... Kxa4 <EGTB> > 15-> 4.40 Mat91 1. ... Kxa4 <EGTB> > 16 4.40 Mat91 1. ... Kxa4 <EGTB> > 16-> 5.21 Mat91 1. ... Kxa4 <EGTB> > 17 5.21 Mat91 1. ... Kxa4 <EGTB> > 17-> 5.44 Mat91 1. ... Kxa4 <EGTB> > 18 5.44 Mat91 1. ... Kxa4 <EGTB> > 18-> 6.08 Mat91 1. ... Kxa4 <EGTB> > 19 6.08 Mat91 1. ... Kxa4 <EGTB> > 19-> 7.33 Mat91 1. ... Kxa4 <EGTB> > 20 7.33 Mat91 1. ... Kxa4 <EGTB> > 20-> 17.73 Mat91 1. ... Kxa4 <EGTB> > >> >>E:\programme\winboard\ruffian>ruffian -h 300M -T \n.epd -t 999 -p 99 >>Hash size 314572800 >>Ruffian 1.0.1 >>feature done=0 >>Loading configuration: ruffian.cfg >>Warning: EGTB_HASH_SIZE changed, default=1048576, newvalue=8388608 >>Logfile: Fri Feb 07 00:09:21 2003 >>Total hash size 300M >>Initializing tablebases: /programme/winboard/nalimov >>Testing \n.epd, 999 seconds, extra ply 99 >>Testing: test 1 Solution: Ne3 Nf3 >> 8/8/8/6Np/2N5/Pk6/6K1/8 w - a3 >> Depth Time Score Best line >> 8--> 1.31 7.70 Ne4 Kc2 Kg3 Kd3 Ncd6 Kc2 Kh4 Kb3 Kxh5 Kxa3 >> 9/19 2.39 7.77 Ne4 Ka4 Ned6 Kb3 Kh3 Kc3 Kh4 Kd4 Kxh5 >> 9--> 3.50 7.77 Ne4 Ka4 Ned6 Kb3 Kh3 Kc3 Kh4 Kd4 Kxh5 >> 10/19 5.45 8.07 Ne4 h4 Ned6 Ka4 Kh3 Kb3 Kxh4 Kc3 Kg4 Kd4 a4 >> 10/19 7.86 x.xx a4 >> 10/19 7.86 ++ a4 >> 10/19 8.09 9.20 a4 Kb4 a5 Kb5 a6 Kc6 Ne6 h4 Nd8+ Kc7 a7 h3+ Kxh3 >> 10--> 8.55 9.20 a4 Kb4 a5 Kb5 a6 Kc6 Ne6 h4 Nd8+ Kc7 a7 h3+ Kxh3 >> 11/19 8.55 ++ a4 >> 11/20 9.42 11.41 a4 Kb4 a5 Kb5 a6 Kc6 Ne6 Kd7 a7 Kxe6 a8=Q >> 11--> 17.34 11.41 a4 Kb4 a5 Kb5 a6 Kc6 Ne6 Kd7 a7 Kxe6 a8=Q >> 12/21 17.39 ++ a4 >> 12/26 25.81 15.93 a4 Kc3 a5 h4 a6 Kd4 a7 Kd3 Ne5+ Kd4 Ng6 Ke3 Kh3 Ke2 >> a8=Q >> 12--> 45.97 15.93 a4 Kc3 a5 h4 a6 Kd4 a7 Kd3 Ne5+ Kd4 Ng6 Ke3 Kh3 Ke2 >> a8=Q >> 13/26 46.15 ++ a4 >> 13/26 1:03 16.40 a4 Kc3 a5 Kb3 a6 Kc3 a7 Kd4 a8=Q Kc3 Nd6 Kd2 Kg3 >> 13--> 1:49 16.40 a4 Kc3 a5 Kb3 a6 Kc3 a7 Kd4 a8=Q Kc3 Nd6 Kd2 Kg3 >> 14/28 2:23 16.53 a4 Kc3 a5 Kb3 a6 Kc3 a7 Kd4 a8=Q Kc5 Ne5 Kd6 Nef7+ >> 14--> 4:35 16.53 a4 Kc3 a5 Kb3 a6 Kc3 a7 Kd4 a8=Q Kc5 Ne5 Kd6 Nef7+ >> 15/32 6:07 16.83 a4 Kc3 a5 Kb3 a6 Kc3 a7 Kd4 a8=Q Kd3 Qe4+ Kc3 Kg3 >> Kb4 Ne6 Kc3 >> 15--> 11:50 16.83 a4 Kc3 a5 Kb3 a6 Kc3 a7 Kd4 a8=Q Kd3 Qe4+ Kc3 Kg3 >> Kb4 Ne6 Kc3 >> 16/34 12:03 ++ a4 >> 16... 12:03 1/22 a4 >> >>Time: 16:39, cpu 85.26%, nodes 619131774, nps 619732 >>Hash: 128M, used 99%, hits 51% >>EGTB: probs 255173, hits 255173 >> >>Best move: a4 (17.18) Not solved (0/1) >> >>Summery: 0/1
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