An implementation of Ultima, complete with rudimentary AI.
To run, supply 2 arguments indicating the players for Black and White. 0 for human/manual, and 1+ for AI. The higher the number the deeper in the decision tree the AI searches, and the longer it takes.
./baroque 0 2 # To play against a moderate AI
To make a move, type 2 square coordinates separated by a space; a1 c4 for example.