Earlier today I set you two puzzles based on Hamiltonian paths in a square grid. A Hamiltonian path is one which visits every cell exactly once. (If you want a print out of the puzzles, click here.) 1 ...
No, not that Hamilton. I meant William Rowan Hamilton, the nineteenth century Irish mathematician. And not that sort of grid. I meant a square grid, like a chessboard or a Sudoku. Today’s two puzzles ...
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