Irregular Killer Sudoku — Knight Features

The normal rules of Killer Sudoku apply, except, the usual 3x3 blocks have been replaced by irregularly shaped, coloured blocks (which must contain all the digits from 1-9).

What's on TV 08.12.23 by muskogeephoenix - Issuu

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This is the hardest killer sudoku I've ever played. Even with hints, I don't understand how to move forward. : r/sudoku

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