Hard Hyper Sudoku

Hard Hyper Sudoku — around 26 givens. The hyper constraints are doing most of the deductive work by this tier. Practise the trick of asking, for each region: which cells in this region can't be a 7? Then a 3?

Hard puzzles introduce locked candidates, pointing pairs, and box-row interactions. Expect 15–25 minutes per puzzle if you're comfortable with those techniques — and steady pencil-mark discipline.

Available packs

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