Chess engine and interface featuring:

• Fully functional chess engine that plays legal chess including castling, enpassant, and recognized standard drawpositions including draw by 3 fold repetition, draw by insufficient material, draw by 50 move rule.
• Unlimited move take back. This is ability to take back all moves up to the initial move made by a player or thecomputers.
• Variable hash table support from 512kb to 40Mb.
• Intuitive Click and Drag -or- Point and Click piece movement. Fully scriptable interface and support for AppleEvents.
• Exachess 2.x and Exachess Lite 2.x chess database compatibility. Simply place Screamer or an alias to Screamer in the Exachess:Tools: Engines folder and select Screamer in the engines dialog.

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Free Version: It's free
Full Version: It's still free
Non-US Price - (Currency Converter)
Download Size: 1.3 MB
OS: Mac OS 9 & X
Developed by: William Bryant

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Download Freeware Screamer Chess for Macintosh