I have been an unabashed fan of sudoku, the number puzzle, for many years. I continue to wonder if such “three dimensional” entanglement puzzles offer insight into the quantum mechanical problem of why macroscopic systems are not, as Einstein once remarked, “fuzzy”.

Here is a numberphile video that addresses the interesting mathematical question of how many clues the sudoku puzzle must give at start in order for there to be a unique solution. The answer is 17.

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