A knight enters the grid at number 1 and then moves, as if he were on a chessboard, to number 2. He visits every square in numerical order, before exiting at number 64.

KEY:
Blue = cube numbers (1, 8, 27 and 64)
Green = squares which are not cubes (4, 9, 16, 25, 36 and 49)
Red = prime numbers (2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59 and 61)
Yellow = multiples of ten (10, 20, 30, 40, 50 and 60)
Purple = multiples of 11 which are not prime (22, 33, 44 and 55)

One number has been added to get you started.

				35

(In reply to re: I, too, solved it :) by brianjn)

Brianjn, When I saw that the puzzle had appeared, I thought you had missed the chance to change the shading. Now, I can see that you have made the yellow a little brighter. I do hope it is OK for Brian. 

Posted by Josie Faulkner on 2008-01-25 13:02:35