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Hard Sudoku #12

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Tip: download the PDF for Letter or A4 paper, print it at 100% and use a pencil or crayon. Tap "Show solution" to check your answer, or print it as an answer key.

Up nextFarm Animals Picture Sudoku →

A 9×9 sudoku for confident solvers, teens and adults, that cannot be finished by spotting single numbers alone: you will need pairs and “only in this row” reasoning, with no guessing. 28 of the 81 squares are filled in. Fill the rest so that every row, column and 3×3 box has the numbers 1 to 9 once each. Every puzzle here has been checked by a solver to have exactly one solution.

Text version of the puzzle
1 . . | 6 . . | . 4 .
. . . | 5 . . | 9 1 .
. . 8 | . 4 . | . 3 5
. . 6 | . 8 5 | . . .
2 . . | . . . | . . 3
. . . | 3 2 . | 4 . .
9 7 . | . 6 . | 3 . .
. 4 2 | . . 3 | . . .
. 8 . | . . 4 | . . 7

A dot is an empty square; a bar separates the boxes.

More puzzles: Nonograms · Mazes · Large-print sudoku

For teachers and parents

What it practises
Logical reasoning, working through options one at a time, number (or picture) recognition
How to use it
Look at one row, column or box and ask which number is missing. Write in only the numbers you are sure of; a pencil and eraser help. Check with “Show solution” or the answer key on page 2.
Time
About 30–45 minutes

More worksheets by age and skill →

Use on your class or library site

Paste this into your school, class or library web page. It shows the picture and a link back here, so families can print it themselves. You can change the wording.

How to add it to your site

More printable sudoku

Hard Sudoku #1Hard Sudoku #2Hard Sudoku #3Hard Sudoku #4Hard Sudoku #5Hard Sudoku #6Hard Sudoku #7Hard Sudoku #8

See all printable sudoku →

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Printing tips

  • Print at 100% (actual size) and solve in pencil so mistakes rub out.
  • Print page 2 separately as the answer key.
  • For picture sudoku, print page 1 twice: one to solve, one to cut the pieces from.