Well, in their last game, they might have played perfectly.

Even if we play perfectly, it's still not good enough.

So has a case example of how a lesser play can be perfectly played.

"The last play of the game was played perfectly by them," said Campbell.

Computer analysis shows that a draw is highly likely if both players play perfectly.

The main question about a given starting position is then to determine which player can force a win if he plays perfectly.

"If I played perfectly every time," he says, "what would be the point?"

The second thing is that, perfectly played, it's pure luck.

If both players play perfectly, the game ends after three consecutive moves.

Perfectly played and conceived, these compositions offered the best American music could give.