Author: James Robertson
Date: 17:33:38 02/19/99
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On February 19, 1999 at 16:30:16, Will Singleton wrote: >On February 19, 1999 at 15:07:08, James Robertson wrote: > >>On February 18, 1999 at 21:09:33, Will Singleton wrote: >> >>> >>>On February 18, 1999 at 20:21:25, James Robertson wrote: >>> >>>>Yes! >>>>Finally they gave my a FICS account. It has the rather boring name of "JRCP", >>>>but John Perry said I could change it when I think of a name for my program. >>>>Anyway, it'll be glad to play any chess programmers here (and their programs >>>>too, of course ;). >>>> >>>>James >>> >>> >>>About time. :) I'll go on fics tonight. >>> >>>Will >> >>Thanks for the games last night! Amateur really crushed me. Fortunately, I found >>several huge bugs that trashed my program's play. Among others, it would do >>futility and extended futility pruning only when there were extensions! That is >>how it missed that simple mate and played Bc5??. Also, I fixed the pawn hash; >>only some of the positions recieved pawn scores. I'm ready to play you again! >> >>James > > >It sounds like you have a lot of advanced stuff in there. How long have you >been working on this? I started the rotated bitboard engine in November. I had my first running version January 2, 1999. I have added null move, all my pruning, and pawn hashing in the last 3 weeks (I have a lot of time on my hands, at least I think I do; I'm afraid my grades will suffer). The only big thing I haven't added are transposition tables. I'm hoping they give a big elo jump. How much did they help your program? >It took me well over a year to get the pawn-hashing in, >let alone extended futility pruning. I don't use that at all, if you're talking >about the DarkThought stuff. Yes; I read Ernst Heinz's articles and hope to add even deeper pruning soon. >Heck, I didn't even know how to properly use >extensions until recently (probably still don't). I only use a few extensions. > >Do you also use rotated bitboards and book learning? :) I do have book learning, but it is not that advanced. Harder was trying to get the stupid program to read and compile the book. > >I did notice that you're king safety was weak, I was able to get in there >pretty >easy. But otherwise it played very well. King safety stinks. :( I can't seem to make my program castle. Most of the time is goes off on queen foraging expeditions and leaves it's king high and dry. How do you make your program castle? James > >Will
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