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Light Up #850

#850 · MediumArchive: not ranked
How to play
  • Put lamps on white squares. A lamp lights its own square and every square in its row and column, until a black block stops the light.
  • Every white square must be lit, and no lamp may shine on another lamp. A number on a block is how many lamps touch its four sides (corners don’t count); a block without a number can have any.
  • Tap a square for a lamp, tap again for a dot (a note for a square that can’t hold a lamp) and once more to clear it. Drag across squares to paint dots.
  • Easy grids are 7 × 7, medium 10 × 10 and hard 12 × 12. Every grid has one answer, found by logic alone. Fastest time wins; fewer changes break ties.

Light Up #850 is the puzzle from Friday, October 30, 2026 (medium). Archive puzzles count toward your statistics, not your streak or the leaderboard.

Archive games count toward your statistics, not your streak or the leaderboards.

About Light Up #850

Light Up #850 was the puzzle for Friday, October 30, 2026, a medium one: a 10 × 10 grid with 20 black blocks, 12 of them numbered. Everyone who played Light Up that day got the same puzzle, and it stays here to play for 60 days.

New to Light Up? The rules, tips and common questions are on the Light Up page, and How to Solve Light Up Puzzles goes into strategy.

Other days of Light Up

Every day of the last 60 is in the puzzle archive.

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