Author: stuart taylor
Date: 03:28:38 10/25/01
Go up one level in this thread
On October 24, 2001 at 11:10:34, Uri Blass wrote: >On October 24, 2001 at 10:04:01, Vincent Diepeveen wrote: > >>On October 24, 2001 at 04:44:18, Uri Blass wrote: >> >>>On October 23, 2001 at 22:22:38, John Merlino wrote: >> >>[snip] >> >>>I believe that the default personality is usually not good for test positions >>>(espacially when there is a forced mate) and it is better to use bigger >>>selectivity. >>> >>>My experience showed that at least for chessmaster6000 ss=10 is better than ss=6 >>>for finding mates. >>> >>>Uri >> >>ss=10 means 10 plies of forward pruning. That's complete suicide >>in computer-computer games. > >I believe that ss=10 is about null move pruning and not about >forward pruning. > >I believe that depth 4/14 of chessmaster means first 4 plies without null move >pruning,next 10 plies with null move pruning and also a lot of extensions. > >I know that chessmaster shows 2 numbers as the depth search and in the middle >game after enough time I can see 4/10,5/11 with ss=6 when I see >1/11,2/12 with ss=10 > >I can see that in the endgame the difference between the numbers is smaller and >in pawn endgames I may see usually depthes like 8/9 and 9/10 with ss=6 when >ss=10 means the depthes are going to be 8/13,9/14. > >When chessmaster has depthes like 4/10 I always see at least 4 plies in the >thinking line(chessmaster6000 can show me the line is consider every 1/2 >second). > >It suugests that chessmaster never check threats after the first ply at this >depth. > >I often see at depth 1/11 only 1 ply in the thinking line and I guess that >chessmaster simply check if there is a threat in the first ply. > >Uri Uri, don't you think it is a very big problem that many programs take a long time to find Nf6? I understand that it is a horizon problem because the mate can be delayed a few moves, pushing it further over the horizon. But the position is relatively very easy for a human. S,Taylor
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