### Akari (aka Light Up)

Posted:

**Wed 15 Dec, 2010 1:44 pm**First draft rules text is adapted from that at nikoli.com

**Place light bulbs (circles) according to the following rules:**

1. A number in a black square indicates how many light bulbs are in the vertically and horizontally adjacent squares.

2. Light bulbs can be placed in

3. Each light bulb illuminates every square in its row and column until it hits a black square or the edge of the grid.

4. All white squares must be illuminated, and light bulbs must never illuminate each other.1. A number in a black square indicates how many light bulbs are in the vertically and horizontally adjacent squares.

2. Light bulbs can be placed in

*any*white square - it does not need to be adjacent to a black square.3. Each light bulb illuminates every square in its row and column until it hits a black square or the edge of the grid.

4. All white squares must be illuminated, and light bulbs must never illuminate each other.