The Concentration source distribution is insufficient to build the application. You will also need:
• The TransSkel application skeleton. You need at least release 3.11.
• The TransDisplay distribution. This is a library implementing text display windows. It's used for the Help window. You need at least release 3.05.
• The Blob Manager distribution. This is a library implementing the game piece operations. You need at least release 1.07.
All distributions are available via anonymous ftp from ftp.primate.wisc.edu under the directory /pub/mac. You can also get them via gopher from gopher.primate.wisc.edu.
The game pieces are taken from the 'ICON' and 'cicn' resources in the resource fork (for the large pieces) and from the 'SICN' resources (for the small pieces). You can add more 'ICON', 'cicn', or 'SICN' resources to the resource fork to increase the number of pieces from which the application chooses.
The application signature is 'Hugh', the name of the host of the Concentration TV game show ages ago.