SigmaChess 4.0 Lite is a freeware Macintosh chess program with color 3D board.
(Sigma4L.hqx)

- Runs on 68K and PPC Macs, requires System 7+, 5M RAM, 3Mb disk space
- Includes true perspective 3D color chess display option
- Includes practically every feature of the old commercial
  ($60) version of Sigma Chess (3.0).
- Scored 60 rating points higher than the 68K version of
  MacChess (v. 2.5) on the "Computer Chess Reports 1-hr rating 
  test" on a 6100/66 using Speed Doubler 2
  (but 30 points less than the PPC-only MacChess 4.0)
- Master-strength on PowerMacs when using Speed Doubler,
  per rating problem tests.
- Reads PGN/EPD chess files
- Plays KQRK, KBNK endings perfectly using endgame tablebases.
- Includes 32-page printable manual, 8 page "Rules of Chess"
- Calculates over 80,000 nodes/sec on a 7300/180 with Speed Doubler

- May be included on commercial CD-ROM collections if kept intact