Baekdoku
100 curated puzzles — then endless.
Beginner-to-intermediate 9×9. Finish them and keep generating at the difficulty you like.
Find the one that fits your pace
All four apps are free to download. Start with whichever catches your eye.
Cheondoku
Slow and easy, a thousand at a time.
Three 9×9 paths — Zen, Sun, Moon — with 1,000 puzzles each, plus a 6×6 warm-up. No stress.
Mandoku
Five grids overlap. Samurai.
100 samurai puzzles on a 21×21 board, plus 4×4, 6×6 and 9×9. Four boards in one app.
DokuBook
Make it. Print it. Solve on paper.
Build a sudoku book at any difficulty and print it on A4 — cover, puzzles and answers.
