How many squares, of any size, can you find on this chess board that do not contain a Rook?
Puzzle Copyright © Kevin Stone
Hint: How many 1x1 squares are there?
There are 116 squares without a rook.
1x1: 61 squares.
2x2: 37 squares.
3x3: 15 squares.
4x4: 3 squares.
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