Mac Chess 2.5.1

File	mac-chess-251-68k.hqx
Size	566.8 KB
Version	2.5.1
Category	Board Game
Year	1996
Mac OS	System 7
Architecture	68K

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About

MacChess is a free, master-strength chess program for the Macintosh by Wim van Beusekom, copyright 1999. Version 5.01 is the PowerPC-native release; a parallel 2.5.1 build remained available for 68K Macs. MacChess 2.5 was for years the most-downloaded file in the AOL Mac Board Games library, with more than 26,000 downloads.Engine strengthIn the 1997 Aegon Computer-Human tournament, MacChess defeated a master and a near-master while running on a low-end 200 MHz PowerPC 603. Version 5.01 reworked the search engine to find forced mates faster in a more compact codebase, and added accurate "mate in N" announcements.New in 5.01The 5.01 release introduced more than 18 features over MacChess 4.0: a large-board option with Classic and American piece sets, a Learning Chess instructional file, an opening book expanded by nearly 12,000 positions, doubled endgame test scores, sudden-death and increment time controls, and independently configurable clocks for White and Black.Analysis featuresMacChess supports continual background analysis while the user moves pieces manually, copy/paste of EPD and PGN positions, ECO opening codes, animated VCR-style game playback, hint, takeback, and printable graphical diagrams. Five piece sets ship with the program.System requirementsVersion 5.01 needs a Power Macintosh with 5.4 MB of free RAM and System 7 or higher. It is not ExaChess-compatible. Distribution is free; commercial CD-ROM redistribution requires the author's permission.