BrainBashers Hard 20 x 20 Light Up - July 12
Copyright © Kevin Stone
• Light up every square in the grid.
• A number in a square indicates how many bulbs share an edge (but not diagonally) with that square.
• A square is lit if it's in the same row or column as a bulb, as long as there are no Black blocks between them.
• No bulb may light another bulb.
[Puzzle Code = LightUp-0712-20x20-Hard-916426]
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