Clue to Puzzle #31: Circle drawn only on the black squares of a chessboard
31. Consider a standard chess board. What is the diameter of the largest circle that can be drawn on the board whilst only drawing on the black squares.
I've struggled to think of a hint for this puzzle. My first offer is a picture of a chess board to look at.
If that's not working for you then my next offer is to show you the answer. I've reconciled this because the question asks you for the radius and I am offering to just show you a picture. It's the red circle in THIS image.
Where next?
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