0h n0 is kind of like Minesweeper in reverse.
You start by choosing from a variety of selectable grid sizes between 5x5 and 8x8.
The grid is then partially filled with numbered blue dots and blank red dots. The number reveals how many blue dots the numbered dot should be able to see.
Blue dots can see all dots in a straight line but can't see
horizontally. They also can't see through a red dot.
Figuring out where the red and blue dots go without having to use an undo makes for an incredibly satisfying puzzle experience.
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