Author: Tony Werten
Date: 06:44:14 11/09/01
Go up one level in this thread
On November 09, 2001 at 09:40:29, Robert Hyatt wrote: >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... Sorry, probing the 5 pieces the first 10 ply and probing 4 pieces in the rest of the tree is not probing everywhere ? Don't get it. I don't probe 6 pieces, does that mean I probe nowhere ? Tony
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