"Traditional full-featured chess game with all of the standard chess
features. Difficulty is chosen by selecting one of four levels and
then assigning a time limit for the computer to choose a move. The
idea is to allow infinite degrees of difficulty.

The only differentiating feature for this time period is the fact that
the board is rendered in 3D, so instead of just appearing 3D, you can
actually rotate the board through any angle." --[MobyGames.com][1]

About the downloads available above:
1st download is the original file in English (v1.0.5)
2nd & 3rd downloads are the French version (v1.0.3)
4th download is an English demo.
5th download is a crack for English v1.0.5 that removes the document
check copy protection.

Compatibility
Architecture: 68k

Minimal requirements:
Macintosh Plus, 1 meg of RAM (more for better playing strength)

Tested successfully on:
Mini vMac for Mac OS X w/System 6.0.8
Basilisk II for Mac OS X w/System 7.5.5

NONE of these versions, English or French, are working with
SheepShaver for Mac OS X w/Mac OS 9.0.4 (see below). Consequently, I
have removed Mac OS 9 from the compatibility list. Compatibility with
Mac OS 8 is still uncertain and needs to be tested.

Sorry, you seem to have discovered a problem in this program. Think
hard about what you just did, and report: ?Unknown pixel type?

  [1]: http://www.mobygames.com/game/checkmate