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Unruly <p> Colour every square either black or white, in such a way that: <ul><li>no three consecutive squares, horizontally or vertically, are the same colour <li>each row and column contains the same number of black and white squares.</ul> <p> Left-click in an empty square to turn it black it out, 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.