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Hard Sudoku

Free Hard Sudoku

Nine puzzles that add triples and row-or-column X-Wings. Progress stays in this browser.

Hard samples

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Nine free Hard Sudoku puzzles.

Restart this practice puzzle?

Your entries, notes, history, selection, and elapsed time for this sample will be cleared. The given digits stay the same.

Reveal this practice puzzle's solution?

Revealing ends this attempt. The exact solution will be shown, this attempt will be marked assisted, and you will need to Restart to play it again.

New techniques at this level

Hard puzzles may need naked or hidden triples and row-or-column X-Wings, in addition to every Medium technique.

Read the technique guide ›