Beginner
2–5 minutes
Free 5x5 Hitori puzzles online — the daily-puzzle size. Learn the sandwich, triple, and pair techniques on a board you can finish in a coffee break.
PlayIntermediate
5–10 minutes
Free 7x7 Hitori puzzles online. A step up from the daily 5x5 — more duplicates per line and your first real connectivity arguments.
PlayAdvanced
10–20 minutes
Free 9x9 Hitori puzzles online — the classic Nikoli print size. Longer deduction chains, corner patterns, and real connectivity play.
PlayExpert
20–35 minutes
Free 12x12 Hitori puzzles online. Long-form solves for experienced players — deep cascades, interleaved wall arguments, and no wasted shades.
PlayExpert
30–60 minutes
Free 15x15 Hitori puzzles online — our biggest boards. Marathon solves with values 1–15, for players who want the full endurance version.
PlayPuzzles
Free Hitori puzzles by grid size — 600 verified boards from quick 5×5 dailies to expert 15×15 grids, graded easy to hard by technique.