from Simon Tatham's Portable Puzzle Collection

Colour every square either black or white. Each number indicates how many black squares are in the 3×3 square surrounding the number – including the clue square itself.

Left-click in an empty square to turn it black, or right-click to turn it white. Click again in an already-filled square to cycle it between black and white and empty. You can left- or right-drag to set multiple squares at once.

Full instructions | Back to main puzzles page

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(last modified on Fri Jan 28 01:47:57 2022)