You can play against a 6x6 checkers player I wrote for Artificial Intelligence in Spring 2003. The version represents the best player I created. Good luck, I can't even come close to beating it anymore. Apologies to the professor from whom I borrowed the php and javascript to run the game. You can play against his version here.
To play against the computer: click the color you'd like to be. Remember that white goes first.



Notes If you have a jump available, you must take it. If it is the computer's turn, you must click on the button just above the checker board to get it to move. If it is your turn to move: When you place the mouse over a piece, the options are shown. To make a move, first click on the piece you wish to move. Next click on one of the highlighted positions that you can move to. Continue this until your move is completed.