Author: Robert Hyatt
Date: 21:58:50 07/04/03
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On July 04, 2003 at 17:27:56, Mike Byrne wrote: >On July 04, 2003 at 17:24:32, Mike Byrne wrote: > >>On July 04, 2003 at 17:04:24, Dimitris Poulos wrote: >> >>>It seems you have found something very importand. Sory that I missed that, but >>>do all those Crafties share the same "secret"? I mailed you for the new Crafty. >>>You are going to send us all those personalities? >>>Excuse my ignorance! >>>Regards, Dimitris >> >>Yes - all the personalities have the same "secret". The "secret" they all share >>is dynamic null move. Other parameters are slightly different. Crafty always >>had a null_min and mull max with a range of 1. I just expanded boundaries by >>one each way depending on the position - so nullmove nows has a range of 4 and > >typo - the nullmove now has a range of 3 ,not 4. From 1 to 4. This will be an interesting test. I've tried this in the past, but I never tried 5 0 games. When I have time, I might crank up a couple of pairs of quad 550's on my cluster and let 'em play some short and long matches to see how this works. I'd expect going to 4 would be better at longer time controls, worse at shorter, since it tends to bury tactics beyond the q-search. > > >>it is dynamic within the search. The "secret" of course is how I did that - it >>was really just a crap shoot - let me try this "xx code" and see what happens. >>I just happened to nail it pretty good on the first shot. >> >>The genesis came from tinkering with MPC - I first tried this on MPC and it made >>it much better - but it still was not as good as standard crafty. So my thought >>was let me try it on standard crafty and see what happens. >> >>Viola! >> >>There was bug in the first version that it to crash. This latest test version >>has not crashed at all in about 50 5 0 games and it's a little different that >>my first pass. I am very excited about it -but that is tempered with the >>thought that this may be a one time fluke and nobody will be able to repeat my >>results. >> >>I made send it out later this weekend. I will ot course send Bob the full >>source. >> >>If anyone is interested in obtaing a free copy of this modified Crafty with all >>the F8 eng files to run this in F8 Shredder 7 or Junior 8, email me with the >>word "include" in the subject heading.
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