A small competition between two people writing a connect 4 program in scala. The competition was a motivating factor for learning Scala, so don't expect the code quality to be that good.
The competition is now over and unfortunately Bruno Carle won 3-2
Both engines are very simple due to the limited time for the competition. Except for an error in converting a board from one representation to another (BitBoard.Engine.convert) the engines played without noticable errors :-)
If I get time for it I will improve my implementation (BitBoard.Engine) in the coming weeks to include more comments, a transposition table, alpha beta search with iterative deepening and better evaluation function.