About Hitori
A Hitori grid is solved by shading repeated numbers while keeping the remaining light squares connected. Dark squares cannot share an edge. New boards in this edition are generated in 5×5, 6×6 and 7×7 and checked for one solution under all three classic rules. The date-based daily puzzle uses 6×6. Circles let you note a square you intend to keep light. Hint reveals one correct cell, and newly assisted games do not set a best time. Existing saved boards are preserved rather than regenerated. Progress, undo and statistics remain local to this browser; there is no cloud-save adapter.
Explore category: Logic Puzzle Games
How to play
Pick a size and New game. Cycle a square between light, dark and circled. Use repeated numbers to narrow your choices, then check adjacency and connectivity. Circles are optional notes. Check identifies a broken rule; Hint reveals a dark square or circles a light one.
Rules in this version
- Every remaining light number is unique within its row and within its column.
- Dark squares never share an edge, though they may meet diagonally.
- All light squares stay connected through shared edges.
- Circles do not change the rules and are not required for completion.
Tips for playing
- Shading a square forces each of its edge neighbors to stay light. Follow that deduction through repeated pairs.
- Keep an escape route for corner squares; satisfying duplicates alone can leave the light area disconnected.
Questions about this game
Must every light square be circled?
No. A circle is just a note. Completion checks numbers, dark adjacency and light connectivity.
What happens to a previously saved puzzle?
Its actual board and marks remain playable. New generation uses stricter full-rule uniqueness checks; it does not replace an old saved board.
Game screenshots
