True test of genius or monumental waste of time? Can you solve the hardest ever Sudoku?
Por um escritor misterioso
Descrição
Finnish mathematician Arto Inkala spent three months designing a Sudoku puzzle with only one solution. On the scale of 1-5 in difficulty, he rated the puzzle as 11.
Do you think you’re an expert at puzzles? Does your brain work in the right way to solve the things that others find impossible? Do you believe you
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