Author: John Merlino
Date: 10:23:06 12/30/03
Go up one level in this thread
On December 30, 2003 at 12:17:10, Mike Byrne wrote: >On December 30, 2003 at 11:31:06, Javier Ros Padilla wrote: > >>On December 30, 2003 at 08:08:48, Mike Byrne wrote: >> >>>On December 30, 2003 at 01:48:57, Javier Ros Padilla wrote: >>> >>>>On December 29, 2003 at 23:25:44, Mike Byrne wrote: >>>> >>>>>On December 29, 2003 at 19:22:35, David Dahlem wrote: >>>>> >>>>>>On December 29, 2003 at 19:12:26, Javier Ros Padilla wrote: >>>>>> >>>>>>>Is there any chess program able to adjust style and parameters of play analysing >>>>>>>the games of a player from a database? >>>>>>> >>>>>>>That is, is there any chess program able to imitate the style of a chess player? >>>>>>> >>>>>>>Thanks >>>>>>> >>>>>>>Javier Ros >>>>>> >>>>>>There are several programs with "personality" settings that can be adjusted, >>>>>>such as Chessmaster, Rebel, Deep Sjeng, and the modified Crafty 19.08 SE engine >>>>>>by Mike Byrne. >>>>>> >>>>>>Regards >>>>>>Dave >>>>> >>>>>You can always build a book based on all the games of that player -- and you >>>>>make programs more aggressive,defensive, sacrificial, cautious, strive for open >>>>>or closed positions -- so in that context the answer might be yes if that is how >>>>>you categorize how that player --- but it's a stretch to say any program plays >>>>>like "xyz" player... >>>> >>>>Ok, I want to know if any program do this work automatic >>>> >>>>Javier Ros >>> >>>I am not exactly sure what you mean when you say "automatic" ...I have >>>personality settings -- in crafty ...type "krafty morphy" at the command prompt >>>or crafty.rc and it will more sacrifices, type "krafty petrosoan" it was play >>>defensively and strive to keep the position closed, etc -- is that what you mean >>>... >> >>When I say automatic work, I want to say that you only give to the program the >>database and the name of the player. The program adjust the parameters of the >>program spending hours or all night. >>I think that Chessmaster creators have such program to build the personalities >> >>Javier Ros > >I do not know of one, but let's ask John Merlino - he would know. > >John , how did Ubisoft develop the personality GM parameters used in >Chessmaster? Was it automatic based on database analysis or just human >judgment? > >TIA A good portion of both. First was the creation of the opening book. We used the program's opening book editor to import a PGN file of all games of a particular GM. We had to do this once for all games as White, and then once again, appending all of the games that the GM played as Black. The difficult decision was exactly which parameters to use for the import. In particular, should we include moves that the GM played in games that he lost? Should we discard moves that he only played once? We eventually decided to include lost games AND moves that the GM only played once -- we felt that this would more accurately reflect the "style" of the GM. Secondly, and probably more important, was the creation of the personality settings. After all, by far the majority of the moves that the personality would play would be after the opening book ran out. We used several GMs and other chess experts (Seirawan, Evans, Schiller and Josh Waitzkin created his own settings) to help us create these personalities. So, while we did our best to make it seem like you were actually playing against that GM, the process certainly was not "automatic", and took a great deal of time and thought for each one. jm
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