True test of genius or monumental waste of time? Can you solve the hardest ever Sudoku?

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.

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True test of genius or monumental waste of time? Can you solve the hardest ever Sudoku?

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The 10 Hardest Logic Puzzles Ever Created

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True test of genius or monumental waste of time? Can you solve the hardest ever Sudoku?

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The Hardest Sudokos In Existence: The Sudoku Puzzle Book For The Most Experienced Players (Ranked As The Hardest Sudoku Collection Available In The