How would you feel if you were the smartest person in the room? You might feel pretty good about yourself, but chances are you'd also feel a little bit lonely.

Our certified IQ test uses 25 questions to test the most important areas of intelligence. These include visual perception, abstract thinking, pattern recognition, analytical thinking and spatial orientation.

Garry Kasparov is one of the most celebrated chess players in history. He is also one of the highest-rated chess players of all time. But what is his IQ?