Choose a variant and difficulty for killer sudoku hard
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Difficulty
Hard
Variant
Classic + Killer
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Looking for a challenge? Open Killer Sudoku multiplayer.
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Use the Academy lesson if Killer Sudoku is new to you.
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Choose Hard Killer Sudoku when you already understand the rule and want a more demanding solve.
Hard pages are aimed at players who already feel comfortable with the variant and want a more challenging puzzle.
Hard puzzles can reward careful deduction and patience while still using the same underlying rule set.
Killer Sudoku adds arithmetic constraints on top of standard grid logic. You are not only placing digits correctly, but also making sure cage totals work.
Avoid solving cages in isolation. A cage total may look valid by itself, but the digits still need to fit the rest of the Sudoku grid.