The board floods outward from the top-left corner. Pick a color and the whole connected region sharing the corner's color converts, swallowing any newly-touching cells of that color.
Turn the entire grid into one color in as few moves as possible.
Hover a color (or first-tap on mobile) to preview exactly which cells it would capture — tap the same color again to commit.
Chase par: a near-optimal target. Beating your personal best lights up gold.
Keys 1–6 pick colors · U undo · H hint · N new board.
Try Custom / Sandbox for any board from 4 up to 48 wide.