The ultimate problem-solver and a lover of brainteasers, it has been suggested that Einstein might have written this classic riddle himself.

It’s a fun but challenging test of deductive reasoning. The aim is to use the fifteen clues to arrange the pieces of the wooden houses in the right place to work out who owns the fish. It is believed that 98% of those who try, cannot solve it.

Can you claim your space in the 2% whose genius might just rival that of the great man himself?