How about speed checkers,,give the person 3 seconds to move then hit the letter 'S' for stop b4 the 3sec timer ok maybe 5 sec since servers are sometimes slow,,lol.

Also how about Give Away,some call it suicide checkers but I don't approve of that word,,so Give Away,,be the first to lose all your checkers..Then an extra twist could be,,next game go right back to regular checkers first to win 2 games of each gets 40 points,,,hmmmm.