Author: Robert Hyatt
Date: 06:32:49 09/21/00
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On September 21, 2000 at 00:38:37, Mike Adams wrote: > I want to thank those who offered suggestions for null move in Pulsar, in >perliminary tests it seems to be worth 50 points to do depth-3 over depth-2. >Also it no longer does null move while in check. > Pulsar manages to win many games by blitzing its opponent with tactics but >its often comeing from behind in very unsound positions it gets itself into. It >will let its queen wander to other side of board while its king is under viscous >attack. It has been known to place its pieces in very awkward positions with >little room for movement. The evaluate basicly only looks a things like 64 >grid poitions bonuses for knights, bishops, pawns. pawn structure such as passed >isolated and double pawns, and rooks on 7th rank and open files. It also has a >little king saftey in that it tries to preserve the pawns around its castled >kings and there is a 25 point bonus for castling. I preety much modled the >evaluate after the simple chess program and have not gone beyond that. Its >playing at 2100 blitz at moment on icc but can still lose to much lower rated >opponents who maybe allign all pieces on king and make a sacraftice at critical >move. Are there some things I can do without getting overly complicated at least >not at first that would improve it postionally. For example is there any way i >can use the moves it generates in the evaluate function to look for things like >piece mobility or pieces threatening the king? I have added a check extension >which seems to be helping king saftey but it still kicks in often late. Any >suggestions would be appreciated. This is the hard part. You now have to start working on your evaluation, to "teach" it what to do and what not to do. IE a queen on the off-side, with no way to get to the defense of the king, is asking for an attack. Ditto for weak or poor pawn structure, etc. It will take a _lot_ of time. But it is the "fun" part of chess as well. :)
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