Free printable · Answer key included
Printable 10x10 Light Up Puzzles (Hard)
Our biggest printable Light Up puzzles. A 10x10 grid takes patience and careful bookkeeping, so it suits experienced solvers who want a full page to work through.
This first pack has four Light Up puzzles with an answer key on the second page. Each grid has 22 to 24 black walls.
10x10 Light Up Puzzles (Hard)
logicpuzzles.ca/printable/light-up/hard-10x10
Puzzle 1 · #500
Puzzle 2 · #314
Puzzle 3 · #323
Puzzle 4 · #499
Answers: 10x10 Light Up Puzzles (Hard)
logicpuzzles.ca/printable/light-up/hard-10x10
Puzzle 1
Puzzle 2
Puzzle 3
Puzzle 4
How to solve
- Light every cell: Every white cell must be lit by at least one bulb.
- Bulbs never see each other: Two bulbs may not share a row or column unless a wall sits between them.
- Numbered walls: A number on a wall says how many bulbs touch it on its four sides.
- Plain walls: Walls without a number can have any number of bulbs next to them.
Free to print and copy for home, classroom and library use. Every puzzle has one answer you can reach by logic alone.