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Light Up

Light Up is a popular puzzle made by Nikoli (
You can play 10 original levels here on a 7x7 grid.
Place light bulbs (circles) according to the following rules:
Light bulbs are permitted to place at any white squares.
A number indicates how many bulbs are next to it, vertically and horizontally.
Each bulb illuminates from bulb to black square or outer frame in its row and column.
Every white squares must be illuminated and bulbs should not illuminate each other.

Click check to test your progress and find your errors, click clear to clear board.
Click control key any time to reset game and click small arrows to select level.

Problem 1 example:

Light up puzzle


Light up puzzle

Programming by Nick Kouvaris © 2005.

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