Light Up

New to the format? The full rules take two minutes to learn: read the step-by-step guide with a worked example on the how to play light up puzzles page, then come back for today’s puzzle.

• Start from the big numbers. A wall marked 3 or 4 in a corner or along an edge has so few neighbors that most of its bulbs are forced immediately.
• A wall whose number equals its count of white neighbors fills them all: if the 2 is satisfied, every other neighbor is guaranteed bulb-free.
• Hunt for cells with a single source of light. If a white cell can only be lit from one remaining position, that position must hold a bulb.
• Cross out what bulbs cannot reach. Once a cell is lit, every other cell in its row and column segment is barred from holding a bulb; mark it and move on.
• Recheck the walls after every placement. Each new bulb changes the counts around up to four numbered walls, and a wall that just reached its number forbids the rest of its neighbors.

Daily light up puzzles rotate in difficulty through the week: Monday and Tuesday grids are compact 7×7 warm-ups, Wednesday to Friday move to 8×8 with sparser walls and longer sight-lines, and the weekend brings 10×10 grids where the beam logic stretches across the whole board.

Unlimited mode lets you pick the size yourself: 7×7 easy light up puzzles when you want a quick solve, 8×8 medium grids for a focused break, and 10×10 hard grids with the longest deductions of the week.

Every daily light up puzzle can be printed as a clean worksheet with the wall layout, all the numbers and the solution at the bottom, ideal for classrooms, puzzle clubs or screen-free evenings. Use the print link below today’s puzzle or pick any past date from the archive.

Print today’s light up puzzles or pick any date from the archive to print an older puzzle.

One puzzle a day not enough? Unlimited light up puzzles generates fresh grids on demand, and the daily archive holds every past puzzle since launch day.