Solve a random Easy : Medium : Hard Japanese-type logic puzzle chosen from today's collection.
Objective / Rules - 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.
Mouse Usage Left-click = bulb >> X >> none. Right-click = X >> bulb >> none. Clicking a clue square will 'tick' it.
Checking If you click 'Check' the system will check for incorrect squares. If 'Show mistakes when checking' is checked they will be marked in red.
Uniqueness Each puzzle has exactly one solution, which can be found using logic alone and no guesses are ever required. If you think you've found another solution, then please double check the rules.