Author: margolies,marc
Date: 16:29:56 01/15/04
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It seems to me that if a time management functon is properly implemented, then it should not be an extrapolation of time spent. Instead, a good time management system must take the eval function of the position into consideration. EG, if a game is clearly winning one need only avoid blunders so in a zeitnot, the search depth of the program might be abridged until time control is reached. On January 15, 2004 at 18:00:15, Bob Durrett wrote: > >Given that a game has already taken t seconds and n half-moves, it seems one >could estimate the time or number of remaining moves [or total time or number of >half-moves] which are expected. One might be more specific by asking "what is >the amount of ramaining time which has 50% probability of occurring" or "what is >the number of remaining moves which has a 50% probability of occurring. > >This is similar to questions about a human's life expectancy. In certain >countries, life expectancy at birth is about 80 years for a female. However, if >it is already know that a specific female in that country has reached the age of >46 years, then the apriori life expectancy for that individual [and for all >other 46 year old females in that country] would be somewhere between 80 and >100. > >The relevance of this to chess engines is in the area of time management. > >It has been said that a properly designed chess-playing program should never >lose on the clock. > >I do not know [and cannot know] how commercial chess engines do their time >management. [In view of Dann Corbett's list, there are also too many amateur >engines to know about too.] > >Intuitively, it would seem that a chess-playing program would do such >calculations to determine the optimum amount of time to take in calculation of >the next move. [This time must take into account time used by anything external >to the engine.] > >My question is: Do most chess engines do their time management this way? If >not, how is what they do different from the above? > >Bob D.
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