01
Look
Check each row, column, and box for what is missing.
GridHearth · Books and games
Free Sudoku puzzles and practice books
Play 27 free puzzles across Easy, Medium, and Hard. Optional logical hints help you find your next move. Continue on paper with our 180-puzzle Easy paperback.
27 free puzzles · no sign-up · progress saves in this browser
Three useful habits
Find one clear move at a time
Start by looking for missing numbers, noting what could fit, and placing a number you're sure of. The full how-to guide shows how these habits lead to your next move.
02
Note
Pencil in the numbers that could fit, so the next move stands out.
03
Place
Place one number you're sure of, then scan the grid again.
Free online practice
Leave and come back without losing your place
- Choose from nine free Easy puzzles.
- Use notes, undo, checking, and optional solutions.
- Come back in the same browser on this device.
Optional game hints
Understand one logical next move
- Ask for a hint while playing a free puzzle.
- Read the steps calculated from your current board.
- Apply one number if you want, or keep solving on your own.
Hints ignore pencil notes. Applying a hint changes one cell, and that change can be undone.
Try a puzzle with hintsGridHearth Press · Sudoku Practice
Find your Sudoku practice path
Explore the Sudoku Practice series and choose the level that suits you. Each book page shows its current Amazon marketplace options.
Volume 1 · Easy
Easy Sudoku Practice: Volume 1
180 Puzzles with Two Starter Techniques, a Solving Checklist, and Complete Solutions
180 puzzles · Naked and hidden singles
- 120 pages
- 8.5 × 11 in.
- Two puzzles per practice page
- Complete solutions
Volume 2 · Medium
Medium Sudoku Practice: Volume 2
180 Puzzles with Locked Candidates, Pairs, a Solving Checklist, and Complete Solutions
180 puzzles · Locked candidates and pairs
- 122 pages
- 8.5 × 11 in.
- Two puzzles per practice page
- Complete solutions
Volume 3 · Hard
Hard Sudoku Practice: Volume 3
180 Puzzles with Naked Triples, X-Wings, a Solving Loop, and Complete Solutions
180 puzzles · Naked triples and X-Wings
- 122 pages
- 8.5 × 11 in.
- Two puzzles per practice page
- Complete solutions
Volume 4 · Mixed
Mixed Sudoku Practice: Volume 4
270 Puzzles from Easy to Hard with a Mixed Final Challenge and Complete Solutions
270 puzzles · Easy, Medium, Hard, and a Mixed finish
- 192 pages
- 8.5 × 11 in.
- Two puzzles per practice page
- Complete solutions