Author: Mike Byrne
Date: 19:02:51 10/06/02
Email me for a free copy. The following email was sent to all previous recipients of my modified Crafty's and who did not asked to be taken off the mailing list. =============================================================================== To My Fellow Crafty Friends: Crafty 19.00 SE Release Continuing with the standard of 17.16 SE, I am releasing Crafty 19.00 SE – a modified version of the wonderful chess program by Dr. Robert M. Hyatt of UAB. Dr. Hyatt is the legal owner of this software and maintains the copyright. The 16 pre-defined levels remain the same, they are as follows in increasing level of difficulty: pawngrabber beginner novice simpleton woodpusher knight bishop player club expert lowmaster master highmaster im gm standard Each level has increased understanding of piece value and a deeper search. To gain more flexibility, search depth was replaced by nodes searched in these predefined settings. In addition levels "pawngrabber" through "high_master" use the option "dm" <delay move> automatically. So that if you play a 5 3 game on any setting, it will respond as if it was playing a 5 3 game and not move instantaneously. The idea behind this is that in typical low settings, the computer will often respond instantaneously - which is not how a human opponent would play. This will give the lower settings a more natural feel for the player. With the 16 predefined settings, you work your way up through the different levels. Each subsequent level has a better piece evaluation and sees a about twice as deep as the previous level. The goal was to make the levels progressive in a natural stepping up process. I estimate that each level has a difference of about 100 elo points - starting with "pawngrabber" at ~1000 ELO and ending with "high_master" at around ~2200-2300. The "IM", "GM" and "Standard Levels" do not have any restrictions on depth and would be considered "professional" levels. The “booster” command was dropped as Crafty new extensions logic accomplished what I was trying to do, but more effectively. crafty.rc file ================================== ext ch 1 ext mate .80 ext rec .80 ext p .80 ext one .80 =================================== As always, you may be removed from this email list by simply responding to this email and typing "remove" in the "subject" field. I have also enclosed the new logo for Crafty 19 SE. There are a few modidfications to the actual engine - nothing major - let me know if think it's better or worse than the unmodified crafty. I think it's about the same. The latest version of crafty is very strong and there wasn't much I can do to improve it. The GUI Arena (freeware) works wonderfully with Crafty chess engines and clones. You may download it from here. http://www.playwitharena.com/ Best Regards, Mike Byrne
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