Printable Hard SudokuFree, with answers: 500 puzzles

Satisfying puzzles that need Naked Pairs and Hidden Pairs. Every puzzle is free and prints large on A4, with the answer on page 2.

EasyMediumHardOni

What Hard sudoku is like

For those who find Medium too easy. Write out your candidates with care and enjoy 30 minutes to 1 hour over each.

Techniques used

See an example of solving Hard, and how it differs from other levels →

Today's Hard puzzle (11/13, No.102)

Changes every day at 0:00 Japan time. Print it as it is.

Solve on phone or PC →

Hard Sudoku No.102puzzlelounge.app/nanpure

Every column, row and bold 3×3 box holds each digit 1 to 9 once.

See the answer

Answer to Hard Sudoku No.102

Hard puzzles: all 500

Choose a number to print that puzzle. The same number is always the same puzzle.

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Questions

Is it really free?

Yes. No sign-up is needed, and every puzzle is free to print.

Are answers included?

When printed, page 2 is the answer. If you do not want the answer, choose page "1" only in your print settings. On screen you can check it with "See the answer".

Is there only one answer?

Yes. Every puzzle has one answer and has been checked to be solvable by logic alone, with no guessing.

Can I hand them out at a school or facility?

You are free to print and hand them out for lessons, brain training, recreation and the like. Please do not collect the puzzles to sell or redistribute them.

Can I also solve on a phone?

Any puzzle can be solved in your browser from "Solve on phone or PC". Notes and hints that teach how to solve are available too. Hard and Oni take a ticket per puzzle in the browser (none needed with the Lounge Pass). Printing is free at every level.