Lantern Sudoku is a free sudoku game you can play online in your browser, with no download needed. Fill the 9×9 grid so every row, column and 3×3 box holds the numbers 1 to 9 exactly once. Every puzzle is freshly generated with exactly one solution.
Lumi, the lantern keeper, guides you through a calm festival night. She shows your first move, cheers your streaks and claps when a row, column or box lights its lantern. Climb a five-step path from a quick Starter puzzle to Expert, and try the Daily puzzle, which is the same for everyone each day. After your first Medium solve, Lantern Cross opens: a variant where both long diagonals must also hold 1 to 9.
Notes, undo and up to three hints make it friendly for beginners. It plays on phones, tablets and computers, and your puzzle is saved so you can continue later. Lantern Sudoku is an original game made by the GamesYap team. Enjoy pure logic? Mine Seeker is another no-guess puzzle.
Yes. Lantern Sudoku is free to play in your web browser, with nothing to download or install. All five difficulty steps, the Daily puzzle and Lantern Cross are included. Coins only unlock new board styles.
Version 2.0.4Nov 2, 2026
2.0.2: Smoother on phones: lighter drawing every frame, less stutter. 2.0.1: Runs smoother on phones: no more sudden freezes, less stutter, and touches are never lost. The points icon now shows where your points go. 2.0.0: Lantern Cross: a new mode where rows, columns, boxes and both long diagonals must hold 1 to 9 (golden diagonal cells, two extra garland lanterns, coins only; opens after one Medium solve, so finished paths find it open). Moonlit sky with soft rays, drifting mist, festival string lights and shooting stars; the board warms up as rows, columns and boxes light and a band of moonlight glides over it. Daily gift, three daily quests and a free chest of coins. New store covers drawn by the game. 1.2.2: Clearer wording: ad rewards give coins only (never points), daily chests show their prize chances, and a few names were made original. 1.2.1: Sharper graphics on phones: the game no longer drops to a low-resolution canvas on slower devices. 1.2.0: Phone update: fills the whole screen in portrait and landscape (big full-width grid with the number pad below in portrait, grid beside the pad in landscape), larger numbers and right-sized keys. Meet Lumi, a cartoon lantern keeper who waves on the menu, explains the goal, points at hints, claps for finished rows, columns and boxes, cheers streaks and celebrates wins. New goal card before every puzzle, 3 lantern lives with a clear fail screen, HUD with cells filled and a lantern garland that lights per finished unit, a difficulty path with stars, locks and best times, a quicker Daily puzzle (coins only), a next board-style teaser, rising lanterns and confetti, and a first puzzle that teaches by doing. 1.1.0: Polish update: new Starter difficulty (level 6) and an interactive first-puzzle coach, number keys in two big rows on phones (70 px wide), lit board with depth and pre-rendered glowing digits (faster), parallax sky with a temple roofline, four unlockable board styles (coins from solves, cosmetic only), standard win screen with coins and 2x coin boost, optional rewarded hint when hints run out (hintAd), the start break now comes after the first Play tap, scripted store preview. 1.0.0: First release: unique-solution puzzles in four difficulties, a Daily puzzle with streaks, notes, hints, undo and conflict highlighting.
No one yet — be the first!
No one yet — be the first!
Yes. It runs in the browser on phones, tablets and computers. On a touch screen you tap a cell and then a number, and notes work the same way. On a computer you can use the keyboard numbers and arrow keys.
Fill every empty cell of the 9×9 grid with a number from 1 to 9. Each row, each column and each 3×3 box must contain every number exactly once. Use the given numbers to work out where the missing ones go, one logical step at a time.
Start with Starter or Easy. These puzzles have many given numbers and can be solved with simple singles. Medium adds fewer clues, while Hard and Expert need careful notes. Solving one level unlocks the next, so the path grows with your skill.
Lantern Cross is a variant mode in Lantern Sudoku. On top of the normal rules, the two long golden diagonals must also hold the numbers 1 to 9. It opens after your first Medium solve and adds extra clues to work with.
