0h N0 is a little logic game that complements 0h h1. It was created by Martin Kool. The concept is inspired by the Japanese Kuromasu.
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Didn't play this as much, an interesting inversion/twist of 0h h1 and nonograms, but didn't stay with it. Doesn't really increase in difficulty even with the larger grids and modes.
If sudoku were reimagined for the touchscreen interface of a phone. Both this and its companion 0h h1 are excellent mobile phone time killers.