Chances are you didn't have enough time to figure out today's Geo Quiz. It's just a hunch.

But when it comes to calculating probability, Jonathan Schaeffer is an expert. He directs Computer Poker Research at The University of Alberta. He's in western Canada's largest city today to watch two of the world's best poker players take on a computer.

And he's got the name of that city on the tip of his tongue.

The answer is Vancouver, British Columbia.

Listen to our interview with Jonathan Schaeffer.