Author: Mike Byrne
Date: 12:29:18 01/02/04
Go up one level in this thread
On January 02, 2004 at 14:08:07, Kurt Utzinger wrote: >What's the difference between these two versions? >And can already be said which is the stronger one. >I would like to implement one of them under Arena 1.02 >GUI as a winboard engine. >Kurt Hi Kurt, As the one who "modifies" crafty into Crafty 19.08 SE - it can be said ( for the first time ), that the standard engine is the same -- , it is just that Crafty 19.08 SE has 31 other different personalities and levels and added commands that are found in regular crafty. So if you wish to use the standard engine, just use "plain" Crafty, if you wish to see how evaluation and seach different settings impact Crafty, you can use Crafty 19.08 SE and use the pre-defined settings or make your own. Sort of like what you used to do with Chessmaster. I always find it very hard to tweak any settings that make Crafty play better. Also what worked in 19.04, may not work as well in 19.08, etc. I have tweaked the personalities a little bit over time - but not too much. I mainly do it to increase variety in play, and to enable to use a crafty that is much "dumber" than standard crafty - even Crafty set at one ply search depth (sd=1), is tough for some newbie chess players. Also, I added a feature that iI call "delay move". When one sets an engine to say "search depth=3", the hardware is so fast, the engine will typically play instantaneously. That is not similiar to how when humans/humans play at all in most non blitz chess games. This feature allows the humaan to set the "sd=3" , 'dm=on" and play a Game/15. Although Crafty will search just 3 ply on every move, it will use the clock as if it was thinking the entire time. You will actually have time to ponder your next move while "crafty" is waiting to make its move. It would have completed its 3 ply search in a few nano seconds and just wait until the appropriate time the level selected (game/15 etc) is killed before responding. It self adapting and can be used for any level (time control). If you have "show thinking on" - you can see the move it will make and get a headstart on your pondering :>). Best, Michael ps anyone can get on the free e-mail distribution (best way to keep updated), by e-mailing me with the word "include" in the subject heading. if you are innterested in the source, email me with the word "source" in the subject heading. I did receive some new source requests today and they will be e-mailed later today. In addition, Leo will carry the most current version on his website, but the fastest and best way to keep current is to be on the mailing list. In addition , that saves his bandwidth and with 160 current subscribers that is not insignificant. Removal from the email is list is just as simple - send me an e-mail with the word "remove". In addition, I delete any addresses that bounce back as undeliverable - they usually carry the full attachment if I don;t keep my mailing list current, I could be quickly overwhelmed. The executable mailing list is private , everyone is "bcc" and the list not shared with anyone. The source mailing list is not "bcc" ,i.e., anyone on the list will see who else is gettting the source. That could be useful if someone wants to share an idea or catches a bug.
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