Hitori

THE PLAYBOOK · ODMON

How to play Hitori

Hitori gives you a focused activity to play in your browser. Shade repeated numbers while keeping black cells separated and all white cells connected. Use the example below to understand a decision. Compare the starting position with the example in the Guide. Look at what changes after your first action.

Play twelve 5×5 puzzles. Any shaded starting cells remain fixed.

Build a steady rhythm

Take enough time to read a new position. If a game has a timer, learn its controls first rather than searching for them during the round. Notice the feedback after each input.

Your goal

Shade repeated numbers while keeping black cells separated and all white cells connected. Use the instructions to see which actions move you towards it. Check the rules when you are unsure.

Step by step

1. Click a cell to shade, mark or clear it.
2. No unshaded number may repeat in a row or column.
3. Black cells cannot share an edge.
4. Check puzzle verifies duplicates and connectivity.

Controls

Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution. Use the control method described here for this activity. Make sure you are interacting with the game rather than the surrounding page.

A useful example

Two identical unshaded numbers in one row cannot both remain. Your next round may have a different position, so inspect it before acting. Notice the change in the playing area.

Watch out for this

Removing every duplicate can disconnect white cells. Check the rule before repeating the action. When a decision goes wrong, compare it with the common mistake described below. Start again only when you intend to leave the current round.

Common questions