THE PLAYBOOK · PT-BUS
How to play Hitori
Use PT-BUS to play Hitori and read its instructions on the same page. Shade repeated numbers while keeping black cells separated and all white cells connected. Follow the explain your choice approach for your next round.
Twelve checked 5×5 boards; fixed black starter squares cannot be changed.
Explain your choice
Try describing the reason for a move or action in one sentence. If the reason is unclear, revisit the rules before continuing.
Your goal
Shade repeated numbers while keeping black cells separated and all white cells connected.
Step by step
- Click a cell to shade, mark or clear it.
- No unshaded number may repeat in a row or column.
- Black cells cannot share an edge.
- 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.
A useful example
Two identical unshaded numbers in one row cannot both remain.
Watch out for this
Removing every duplicate can disconnect white cells.
Common questions
Can you show a concrete example?
Two identical unshaded numbers in one row cannot both remain.
What is included in this edition?
Twelve checked 5×5 boards; fixed black starter squares cannot be changed.
Which controls should I use?
Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.
