After 18 years spent playing the game and millions of matches won and lost, a computer has now solved the riddle of whether there can be a perfect game of checkers. Computer scientists working at the University of Alberta in Canada used a program called Chinook to factor out the 500 billion positions possible in any one game of checkers. The result was that it is possible to reach a draw against your opponent but it’s exceedingly rare to happen. Chinook was able to plot out every possible move and reach the …