Lighthouses: a 9×9 puzzle to print, with its solution

27 October 2026 · Leer en español

This Lighthouses puzzle comes from the same generator as the app, at the Normal level: nine rows, nine columns and a few walls, some of them with a number. It has a single solution, and it can be solved by logic alone, without guessing.

How it is played

Place lighthouses until no square is left in the dark.
A lighthouse lights up its row and its column as far as the first wall.
Two lighthouses can't see each other: neither can stand where the other's light reaches.
A wall's number says how many lighthouses sit right next to it on its four sides (above, below, left and right).

All the games and their rules

Lighthouses · Normal · 9×9.
empty	empty	empty	wall	wall	wall	wall	empty	wall
wall, 0	empty	wall, 2	wall	empty	empty	empty	empty	empty
empty	empty	empty	empty	empty	wall, 0	wall	empty	wall, 2
empty	empty	empty	empty	empty	empty	wall	empty	empty
empty	empty	wall, 2	empty	empty	wall	empty	empty	empty
empty	empty	wall	wall, 2	empty	empty	empty	empty	wall
empty	wall	empty	empty	empty	empty	wall	empty	empty
empty	empty	empty	empty	wall, 1	empty	wall, 0	wall, 3	empty
empty	empty	empty	empty	empty	empty	empty	empty	empty

Show the solution

empty	empty	lighthouse	wall	wall	wall	wall	empty	wall
wall, 0	empty	wall, 2	wall	empty	empty	empty	empty	lighthouse
empty	empty	lighthouse	empty	empty	wall, 0	wall	empty	wall, 2
lighthouse	empty	empty	empty	empty	empty	wall	empty	lighthouse
empty	lighthouse	wall, 2	lighthouse	empty	wall	lighthouse	empty	empty
empty	empty	wall	wall, 2	lighthouse	empty	empty	empty	wall
empty	wall	empty	empty	empty	lighthouse	wall	lighthouse	empty
empty	empty	empty	lighthouse	wall, 1	empty	wall, 0	wall, 3	lighthouse
empty	empty	empty	empty	empty	empty	empty	lighthouse	empty

In the app, Lighthouses has five levels, from Gentle to Hard, and before your first game it shows you how to play.

Lighthouses: a 9×9 puzzle to print, with its solution

How it is played

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