Author: Tom Likens
Date: 11:40:36 01/03/06
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On January 03, 2006 at 14:08:26, Tord Romstad wrote: Tord, A few comments interspersed below. >Hi Tom! > >On January 03, 2006 at 13:16:31, Tom Likens wrote: >> >>Yeah, the name's a bit of a misnomer. BTW, do you do *any* real pruning in >>Glaurung or is everything a reduction only. > >Glaurung Mainz does no real pruning, but my latest development version >uses a very primitive form of static null move pruning in the last two plies. >This is a very recent addition, implemented one of the last few days before >Christmas. During the holiday, I played my longest ever self-play match: >A 1920 game match played from the 960 different FRC starting positions. >The version with static null move pruning won by 1034-886 against a >similar version without static null move pruning. What time control control? Also when you mention the last two plies, I'm assuming you're talking about the last two plies above the horizon (i.e. the interface between the normal search and the quiescence search). I'm actually toying with the idea of changing the type of pruning/extensions the engine does based on the amount of time left in the game. If both players are short of time the engine may be able to get away with more agressive reductions, while conversely it may make more sense to be conservative if there is a large amount of time left. >>I could look at your code but >>1) I'm at work (obviously working hard after the New Year) and 2) it's >>easier to just ask you ;-) > >And also: > >3) My current version is quite different from Glaurung Mainz. I probably should know this, but what are exactly are you calling *static null-move pruning* ? > >>BTW, are you going to participate in CCT8? It would be fun to have >>Glaurung there? > >I am not quite sure. I have never participated before, and frankly I >find on-line events to be a bit boring. Perhaps I will be there, but >I probably won't know until a few days before the start of the >tournament > >>If the time difference is too much, maybe you could find >>an operator on this side of the Atlantic to run your program. > >I really don't want to do that. If I cannot be there myself and chat >with the other programmers, there is just no point. Besides, it >would make the tournament less interesting for the other >participants. I know I would be disappointed if I operated my >program and faced an opponent not operated by its author. > >Tord Yes, the interaction between programmers is the attraction for me as well. I appreciate the effort put out by the various operators, but the exchanging of ideas with other programmers is the real draw. I wouldn't underestimate the drama though. I participated two years ago and it was fairly exciting, (of course this statement qualifies me for nerd of the year, but I'm afraid this hobby already has done that!) --tom
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