Author: Robert Hyatt
Date: 06:40:29 11/09/01
Go up one level in this thread
On November 09, 2001 at 02:16:49, Tony Werten wrote: >On November 08, 2001 at 18:04:43, Robert Hyatt wrote: > >>On November 08, 2001 at 14:46:15, Tony Werten wrote: >> >>>On November 08, 2001 at 12:01:16, Robert Hyatt wrote: >>> >>>>On November 08, 2001 at 07:45:59, Vincent Diepeveen wrote: >>>> >>>>>On November 07, 2001 at 15:51:59, Robert Hyatt wrote: >>>>> >>>>>>On November 07, 2001 at 12:22:05, William Dozier wrote: >>>>>> >>>>>>>Good day to all of you, Question: Is there a killer book for black? Is there a >>>>>>>book for black, so it can counter all the white moves. When does the table base >>>>>>>start kicking in; in crafty? >>>>>> >>>>>>I doubt that there is any "killer book" for black or white, assuming your >>>>>>opponent does his homework. >>>>>> >>>>>>tablebases start getting hit when there are around 16 pieces left on the board, >>>>>>most of the time. Others might get different results of course. I have seen >>>>>>hits with 20 pieces left... but not very often. >>>>> >>>>>With all extensions turned on i get hits from openings position >>>>>already after a night of search with big hashtable. >>>> >>>>Overnight that is possible. I interpreted it as "during a real game". :) >>> >>>Depends on where you probe. I probe everywhere and have seen tablebasehits with >>>30 pieces on the board in 3 minute searches. Useless but funny. >>> >>>Tony >> >> >>What happens when you get into 8-10 piece endings? Does your speed die? I >>did that early on and actually lost winnable games, because I slowed down so >>bad the search depth was not enough to reach won positions. IE from 100K it >>would drop to 1-5K... > >If I have a 10 ply search I will probe the first 10 ply on harddisk, for the >rest I use my own tablebaseformat wich stores the 4 and 3 pieces in memory, >making probing not more expensive than an evaluation. > >At the dutch open I set up a testposition with 6 pieces and still got 1Mn/s on a >AMD 1700+ > > >Tony \ That isn't "probing everywhere". IE with a 10 ply search, you can extend to way beyond 20 plies. Probing out there will hurt. And if you probe in the q-search it will hurt even more. Your limit is the same as I have been using for years...
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