Re: Hardest Sudoku I\'ve ever seen
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This puzzle does not require guessing. A few applications of X-wing, Y-wing, and simple coloring can resolve this - I tossed it into a Sudoku Solver and it didn't even get to the uglier solving methods like Finned X-wing and MultiColoring etc, and it certainly didn't get into the "Trial and Error" (or guessing) methods.
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sudokusolver.co.uk definitely got into guessing
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