How to play
- Use each number as a visibility clue.
- Blue cells can see across rows and columns until blocked.
- Mark blockers and open cells until every clue is satisfied.
Original Puzzle
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Yes. The game is free to play in your browser and does not require an account.
The page is designed for desktop and mobile play. Some grid-heavy puzzles are easier on larger screens.
0h n0 pairs well with 0h h1 because both are compact two-state grid puzzles, but the deduction feels different. Instead of balancing rows and columns, you reason about sight lines, blockers, and how far each numbered clue can see.

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