Author: David Dahlem
Date: 12:24:31 02/04/04
Go up one level in this thread
On February 04, 2004 at 14:51:56, Slater Wold wrote: >One of these days, I will break through simply writting a move generator... > >When I do, this was one of my first things to do. Have dynamic piece values, >and a planning routine, and see how, without anything else (per se) it performs. > >Just take the basic do & don't, and try to let the engine figure out the rest. >Perhaps a great resource for this would be Max Euwe's book, "Judgement & >Planning in Chess". > > I think this is a great, interesting idea. A non-beancounter. :-) Please do this as soon as possible. :-) Dave > >On February 04, 2004 at 14:15:33, Tom Likens wrote: > >> >>Hello Everyone, >> >>I'm getting ready to implement some new features in my engine and >>one of the items on my TODO list is to give the engine some rudimentary >>planning capablities. The idea I've been toying with is to use the >>features of the pawn structure (and the king locations) to guide what >>the engine should try over the next few moves. The advantage of using >>the pawn formation as a trigger or even index into a variety of evaluation >>functions, (perhaps dynamically selected by a function pointer at runtime) >>is that the information could be stored in the pawn hash table for >>easy retrieval. >> >>As an example, if the center is blocked and white has a preponderance of >>force and space on the king side then it may be okay to start a king- >>side attack using the white king pawns to break open the black king's >>castled location. At the very least moves like g4, h4 should be considered. >>This would be especially true if the black queen was trapped on the >>queenside and the black's king safety was already weakened. Other >>factors would be control of the squares around the enemy king, but the >>initial trigger would be the features of the pawn structure. >> >>Anyway, this is just one example other patterns could be the Stonewall, >>the pawn chains that arise out of the French Defence, the Caro-Kan etc. >>or even recognizing when a queenside minority attack made sense. >> >>In fact, I've starting using a variation of this idea in the king safety >>routines. >>I recently started saving the pawn state of the six squares directly in front >>of the king (if a pawn is present then bit is set in an 8-bit index). This >>value, once calculated, is used as an index into an array of function >>pointers that point to functions tailored for the specific pawn structure >>(e.g. if the pawn structure is a fianchetto structure then elements related >>to the strength or weakness of the fianchetto bishop etc. are checked). >>So far, the results have been encouraging but it needs a lot of tuning and >>experimentation. >> >>Anyway, I was wondering has anyone else here given any of these >>ideas a try yet? And if so, how successful have they been? >> >>regards, >>--tom
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