GridHearth · Books and games
Play 27 free puzzles across Easy, Medium, and Hard. Optional logical hints help you find your next move. Continue on paper with two new large-print volumes and the Sudoku Practice collection.
27 free puzzles · no sign-up · progress saves in this browser
New from GridHearth Ravenlock
Two large-print paperbacks. Begin with Very Easy puzzles, then continue with Easy Sudoku. Each book page shows what is inside and links to its Amazon listing.
Volume 1 · Very Easy + Easy
Paperback listed · check current price on Amazon40 Very Easy, Then 80 Easy Puzzles — One Puzzle per Page in Large Print
120 puzzles · 40 Very Easy puzzles, then 80 Easy puzzles
Volume 2 · Easy
Paperback listed · check current price on Amazon120 Easy Puzzles, One Puzzle per Page, in Large Print
120 puzzles · 120 Easy puzzles for steady practice
Three useful habits
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.
Check each row, column, and box for what is missing.
Pencil in the numbers that could fit, so the next move stands out.
Place one number you're sure of, then scan the grid again.
Free online practice
Optional game hints
Hints ignore pencil notes. Applying a hint changes one cell, and that change can be undone.
Try a puzzle with hintsGridHearth Puzzles · Sudoku Practice
Explore the Sudoku Practice series and choose the level that suits you. Each book page shows its current Amazon marketplace options.
Volume 1 · Easy
Listing on Amazon · check delivery180 Puzzles with Two Starter Techniques, a Solving Checklist, and Complete Solutions
180 puzzles · Naked and hidden singles
Volume 2 · Medium
Listing on Amazon · check delivery180 Puzzles with Locked Candidates, Pairs, a Solving Checklist, and Complete Solutions
180 puzzles · Locked candidates and pairs
Volume 3 · Hard
Listing on Amazon · check delivery180 Puzzles with Naked Triples, X-Wings, a Solving Loop, and Complete Solutions
180 puzzles · Naked triples and X-Wings
Volume 4 · Mixed
Listing on Amazon · check delivery270 Puzzles from Easy to Hard with a Mixed Final Challenge and Complete Solutions
270 puzzles · Easy, Medium, Hard, and a Mixed finish
