Lighthouses

A logic game about uncovering hidden islands

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How to Play

Find all the hidden islands

Each quadrant has a "lighthouse" (a cell with a number) that reveals the total islands located in that section.
An island is made of two squares next to each other. All lighthouses are part of an island.
Islands can't share edges but can touch corners.
Numbers on the top and side tell you how many parts of an island are in that line.
Use logic to solve find all of the islands.

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Custom puzzle

Set the number of islands you want in each quadrant (1 – 4)

Create puzzle

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Alert count errors

Place red dots in columns or rows where there are too many island cells.

Auto cross-out

Automatically cross out cells in a column or row if it has the required number of island cells.

This does not guarantee your cells are correctly guessed.

Clear board

Remove any guesses or marked cells. The puzzle and time stay the same.

Save & resume