Four packs at each level. Pick a pack to see every page before you print it.
Naked Singles are enough: look for the one digit a cell can still take. 36 clues.
Adds Hidden Singles and Locked Candidates. 30 clues.
Pairs, Triples and Unique Rectangles. As few clues as the puzzle allows.
X-Wings, Skyscrapers, XY-Wings and their kind.
XY-Chains, finned fish and ALS: the deepest techniques in the Learning Hub.
Small grids with the same rule, solvable with Singles alone. A gentle way into Sudoku before the 9×9 grid.
Digits 1 to 4 in a small grid with 2×2 boxes. A first Sudoku for young children.
Digits 1 to 6 with 2×3 boxes: the next step up before 9×9.
A pack is the same for everyone who prints it, so a class can work on Easy Pack 2 together and check one answer key. Every page has lines for a name and the date.
Print four to a page to save paper, or one to a page with large print for easier reading. The ink saver drops the shaded cells. The answers can be left off when the sheets go home.
Every puzzle has exactly one solution. The Classic packs are graded the way our Solver grades any puzzle: by the hardest technique it needs, on the five-level scale of the Learning Hub, where each technique has a lesson.
These puzzles are made for paper and are never used in tournaments or duels. To play online instead, with pencil marks and a hint for every step, start a puzzle now. How often each technique comes up is on Sudoku by the Numbers.