- Place light bulbs in some of the white cells so that all
the white cells are lit and no bulb is lit by another light bulb.
- A light bulb shines horizontally and vertically up to the
next black cell or to the edge of the grid.
- A number in a black cell indicates how many bulbs
must be placed in
orthogonally adjacent cells.
Additional Rules:
The given numbers have been replaced by letters; all instances of a particular
letter represent the same number, but two different letters must represent different
numbers.
Regeln