Presented by Jeremy James

For one weekend last summer, the most powerful computers in the world came together in Linz, Austria, to find out which was the strongest of them all - the World Computer Chess Champion. Is it possible that one day quite soon a computer will play chess better than any human being?

Joint British Champion Bill Hartston challenges the European Champion which, in its more serious moments, is the atomic reactor computer at Harwell. Professor Richard Gregory explains the workings of human mind and eye and you at home can join in a test designed to reveal what a human being can do which a computer, hopefully, cannot!