Free to use, no account
Hitori puzzle
Cross out repeated numbers while keeping black cells apart and all remaining white cells connected. Every puzzle is checked to have one solution.
Hitori number grid
This page creates puzzles locally and accepts only grids with one rule-valid solution. New puzzles can take a brief moment on slower devices.
How to play
Tap or focus a number and press Enter or Space to mark it black. Marked cells are crossed out; unmarked cells stay white. A valid board has no repeated white number in any row or column, no side-touching black cells, and one connected white area. Check the board or request a hint when you need help.
How do you solve a Hitori puzzle?
Mark a cell black to remove its number. Each row and column must have no repeated white numbers, black cells cannot touch horizontally or vertically, and every white cell must connect to the others through sides. Use Check board for rule feedback or request a one-cell hint.
Frequently asked questions
How do you solve a Hitori puzzle?
Mark a cell black to remove its number. Each row and column must have no repeated white numbers, black cells cannot touch horizontally or vertically, and every white cell must connect to the others through sides. Use Check board for rule feedback or request a one-cell hint.
Are my moves sent or saved?
No. Puzzle generation, checks and hints run in this browser. Your moves are not uploaded or saved by this tool.
What are the rules of Hitori?
Do not leave duplicate numbers among the white cells in any row or column. Black cells cannot touch orthogonally, and all white cells must form one connected area. Diagonal black cells may touch.
Does each new Hitori puzzle have a solution?
The generator checks that each displayed grid has exactly one solution under these rules. It runs on your device and does not need an account or a server.