Author: Roberto Waldteufel
Date: 16:03:48 07/15/98
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On July 15, 1998 at 08:21:50, frank phillips wrote: >Thanks to those who responded. There are some interesting pointers and most of >all encouragement. Tom asked about node-rate. I will do the test he suggested >of how many nodes it takes to a reach a ply. The current node rate is around >40k nps in the starting position, rising to up to 70k nps or so in the endgame: >where a node is a call to the quiescent search function or a call to Negamax >that is not also a call to Quiescent (ie nodes are counted in Negamax only after >the if(depth>=maxdepth) Quiescent(....); bit). > >Don indicated that there are no big leaps just lots of small improvements that >add up. This is useful to know. I obviously have an awful lot of small steps >to take. At the moment I bring a local array of structures into existence at >each incarnation of the search functions. It is of fixed size - int MoveT >move[MAX] - which is gross and may be slowing things down. I will move to a >global stack array and pointers next. You guys seem to have been born >genetically imprinted with the null move, killer heuristic, hash table, >bitboards etc concepts :-) As a complete beginner I have found it difficult >to get hold of material describing these techniques and was looking for >references.- is there a relevant FAQ somewhere? There are few books on computer >chess and those mentioned here seem to be out of print. Perhaps the answer is >back issues of the ICCA journal - but hopefully not them all. (Are they >suitable for only the experienced expert?) . Without the net and the help of >members of CCC I would not have even taken my first step. > >Frank Hi Frank, Two books I would recommend to learn about most of the things discussed: "Chess Skill in Man and Machine" by Peter Frey (Springer Verlag) "Computer Chess Compendium" by David Levy (Batsford) They are not terribly up to date, but I think you'll find them usefull. Good luck, Roberto
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