Author: Vincent Diepeveen
Date: 14:30:15 12/27/00
Go up one level in this thread
On December 27, 2000 at 13:07:05, David Rasmussen wrote: >On December 27, 2000 at 12:32:45, Vincent Diepeveen wrote: > >>On December 27, 2000 at 12:29:08, David Rasmussen wrote: >> >>>On December 27, 2000 at 10:29:34, Gian-Carlo Pascutto wrote: >>> >>>>On December 27, 2000 at 09:43:05, Vincent Diepeveen wrote: >>>> >>>>> >>>>>[D]5n2/B3K3/2p2Np1/4k3/7P/3bN1P1/2Prn1P1/1q6 w - - 0 1 mate in 30 >>>>> >>>>>Diep needs 10k nodes and 0 seconds to find it. >>>>> >>>>>How about the programs you have over there, do they need the same amount >>>>>of nodes? >>>> >>>>Sjeng: prove >> >> >>>> >>>>Max time to search (s): 120 >>>> >>>>P: 0 D: 100000000 N: 27717 S: 27716 Mem: 0.85M Iters: 758 >>>>This position is WON. >>>>PV: e3g4 e5f5 g4h6 f5e5 h6f7 e5f5 f7d6 f5e5 f6g4 e5d5 g4e3 d5e5 d6f7 e5e4 f7g5 >>>>e4e5 g5f3 e5e4 f3d2 e4e5 d2f3 e5e4 f3g5 e4e5 g5f7 e5e4 f7d6 e4e5 e3g4 e5d5 g4f6 >>>>d5e5 d6f7 e5f5 f7h6 f5e5 h6g4 e5f5 g4e3 f5e5 f6g4 e5e4 g4f2 e4e5 f2d3 e5e4 d3f2 >>>>e4e5 f2g4 e5e4 g4f6 e4e5 e3c4 e5f5 c4d6 f5e5 f6g4 e5d5 c2c4 >>>> >>>>The 27K nodes is tricky as most of them aren't really searched. This >>>>takes less than a second on my Cyrix120. >>>> >>>>-- >>>>GCP >>> >>>How on earth can you guys find this so fast? >> >>First of all SJENG is a mate prover so let's forget sjeng. >>Diep isn't a mate prover but a normal chessprogram. It took indeed >>some 6 years of search experiments to get that far. >> >>Note that this position was at the homepage from WEINERS company >>to promote if i'm right shredder2. >> >>Nowadays to my amazement shredder4 no longer finds it! >> >>dunno about shredder5. >> >>So if i were as ignorant as the majority of >>posters here: shredder got worse! >> >>Greetings, >>Vincent > >But still. My program which is fairly strong, searches 13-15 plies (I don't >remember) in 5 or 10 seconds on my computer, which is far from enough to see >that line. How can one see that line with a normal chess program in one second? The basic extension idea has to do with positions that have only 1 legal move, but just that condition you're not going to get there.
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