Author: Robert Hyatt
Date: 07:28:13 08/29/98
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On August 29, 1998 at 07:08:04, Ed Schröder wrote: >>>One thing I did note is that Crafty's time utilization seems haywire in the >>>games... you didn't say how you played them, but if you are playing on the >>>same machine, that will cause problems from my end for sure, as time >>>allocation depends on "pondering"... if it is off, it will get into time >>>difficulties later in the game, every time... > >>Fritz engines in internal engine match always run without PB (and yes, I >>clearly stated this). I deliberately used 25'+12" to avoid any time trouble situation >>caused by time management problems ... Crafty's time allocation looked similar >>enough to Junior's (or anybody elses) that I didn't suspect any problems ... > >Bob is right here. Testing chess program without Permanent Brain (PB) is a >waste of time if you want an accurate result. The time algorithm's in chess >programs are written in cooperation with the PB. Without the PB a chess >program after some time (say after move 20) will automatically become into >time trouble resulting in bad moves. > >I already pointed that out when the Crafty-Rebel NPS game was running. >In this NPS game Rebel in several cases did come into time trouble >because the lack of the PB. The same applied for Crafty in this game as >also Bob pointed out at the time and I agree with him. > >Unless a chess program has a *SPECIAL* time control routine for handling >games played without PB, games played on one PC IMO should be >considered as fun and no more than that. This also counts for my own >build-in Rebel autoplayer were you can autoplay Rebel engines. > >Playing games without the PB I consider the same as playing games >without an opening book. As the opening book the permanent brain >is an essential part of a chess program. > >- Ed - I added a small amount of code midway thru the rebel/crafty nps match to help with this. But it has never been "tuned" while the normal time allocation has been tuned over 5 years or so now... I probably should tune this to avoid the problem, but I simply don't play without thinking on the opponent's time, and therefore never have/take an opportunity to adjust this... and either crafty will use too little time, or too much time, although I have no idea in which way I "bias" the error... But I think I'll at least look at it...
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