from Simon Tatham's Portable Puzzle Collection

Sorry, this Javascript puzzle doesn't seem to work in your web browser. Perhaps you have Javascript disabled, or perhaps your browser doesn't provide a feature that the puzzle code requires (such as typed arrays). These puzzles have been successfully run in Firefox 19, Chrome 26, Internet Explorer 10 and Safari 6.

Colour every square either black or white, in such a way that:

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; middle-click to reset any square to empty.

Full instructions | Back to main puzzles page

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(last modified on Tue Jun 6 01:46:18 2017)