Lanternward

Lanternward is a logic puzzle in the classic Akari ("Light Up") family: a lantern lights its whole row and column until a rooftop stops it, numbered roofs say how many lanterns stand beside them, and no lantern may shine on another. Every puzzle has exactly one solution and can be solved by reasoning alone. No guessing, ever.

• 300 graded puzzles across 10 districts, 6×6 to 14×14, then Endless Night

• A new daily puzzle every day

• Difficulty measured by the deduction it needs, not by a label

• Four stars by time against each level's target, your best times, never a countdown

• Stuck? A hint places one correct lantern and "Show my mistake" marks the wrong ones. Each costs one star, nothing else

• Colour-blind palette

• Progress is saved in this browser

Free to play. This browser edition shows no ads.

Mouse: click a street cell to place a lantern, click again to mark a dot, click once more to clear it. Hold the button to mark a dot directly. Touch: tap and long-press the same way. Hint and Show my mistake are on the buttons under the board.