Start with an 8 x 8 grid:
Next, enter the number 1 into any box in the grid of your own choice.
You have now got to move around the grid as a knight piece does in chess; you can only move 2 squares up/down then 1 square left/right or vice versa.
Number consecutively each box you land on.
Here’s an example;
From this you can see I placed the 22 in the wrong box – if I had chosen one of the other 3 possibilities I could have continued.
So, can you fill all 64 boxes?