Author: James Swafford
Date: 04:49:58 06/20/02
Go up one level in this thread
On June 20, 2002 at 03:46:47, Kurt Utzinger wrote: >On June 20, 2002 at 03:37:13, Tony Werten wrote: > >>On June 20, 2002 at 03:14:53, Kurt Utzinger wrote: >> >>>Personally spoken, I prefer matches with ponder=off. And this due to an >>>experiment made some years ago even played on_two_PC 486/86 with_two_programs at >>>level 120 min/40 moves. The first match over 20 games was played with ponder=on, >>>the second match [same openings] with ponder=off. And you will hardly believe >>>it, but in the match with ponder=off the overall average search depth per move >>>was higher than in the match with ponder=on. This seems to confirm what Dieter >>>Buerssner wrote on this subject. He said that he would prefer to do his private >>>tests with ponder=off as this method would use CPU time more efficiently because >>>the CPU cycles for pondering on wrong moves are not wasted. Maybe someone should >>>repeat such a test with the latest programs to have a good comparison between >>>the various programs. >> >>I don't think you need tests. >> >>Suppose we have 100 cycles to spend for 2 moves. ( 1 own, 1 ponder ) >> >>with pondering on: >> >>you get 25 cycles for the first move, 25 for the second. Assuming pondering is >>correct 75% of the time you get 25+(0.75*25)=43.75 cycles effectively. >> >>with pondering off: >> >>you get 50 cycles for the first move, 0 for the second=50 cycles effectively >> >>Tony >> >> >>>Kurt > >Most intersting answer. Assuming that pondering is correct less than 75 % which >in my opinion is more reliable, then I do not understand why a program should >ponder at all. >Kurt If you can make a good guess at your opponent's next move, and start thinking about your reply, you'll save a lot of time over the course of the game. Think about it - don't you play the same way over the board? You don't just sit and read a book until your opponent makes a move, do you? :) -- James
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