Additional
Information: Summer School in Semantics (at BRICS, Aarhus University, Denmark) and in particular the course about category theory there, was the cause of this game. For 2 or more players. One of the designers is Olle Möller.
A very abstract card game. The cards
Ccard Sites:
CCard a Category Theory Card Game CCard a Category Theory Card Game: The official site for this abstract mathematical card game. You can download the deck as a gzipped postscript. (Ccard) http://www.verify-it.de/sub/ccard/index.html