An ordinarily simple task proving impossible is frustration defined. Enter Sudoku, the now-ubiquitous numbers puzzle. Despite its straightforward rules, solving the game can be really, really hard. Just ask Arto Inkala, the guy who claimed to have created the most difficult Sudoku puzzle in the world. (Check out the puzzle below, and try to solve it — if frustration brings you joy and you have A LOT of time to kill, that is.)
Do You Sudoku?
Here's The World's Hardest Sudoku
Here's The Answer
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