Author: Ralph Stoesser
Date: 09:37:29 07/05/03
Go up one level in this thread
On July 05, 2003 at 08:15:23, Ralph Stoesser wrote: >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. >> >> >>>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. > >Seems so be very much stronger than standard crafty in comp vs. comp games. I >have tried some 10 0 games against Fritz 8 and F8 seems to have no chance to win >at all! I'm very curiously what in detail your changes are. > >Best regards, >R. I was probably too optimistic about the 10-0-strength against F8 since now F8 leads by +9 =3 -6 against Crafty Petrosian. When I wrote the above it was a +0 =3 -3 lead by Crafty Petrosian. But anyway I see a nice improvement so far. Tonight I will let play Crafty Petrosian on a chess server a couple of blitz games. I will post the results here. Ralph
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