Sudoku, head to head.
Two players, the same puzzle, one winner. Race to fill the grid first, climb from Bronze to Diamond, and challenge your friends — free on iPhone.
Free to play · iPhone · 17 languages
Classic Sudoku, now with a rival
Same puzzle, live race
You and your opponent solve the exact same grid at the same time. The first to complete it wins.
Five arenas to climb
Win points, level up and move from Bronze to Diamond. Every arena hands out fewer clues.
Challenge your friends
Create a free account to add friends and challenge them in any arena you have unlocked.
Practise any time
Play solo against the clock, pause when you like and chase your best time in every arena.
Every move counts
A match is a sprint. Speed matters — but so does being right.
- Both of you get the same fresh puzzle, generated for that match.
- Watch your opponent’s progress bar fill up live — never their numbers.
- A wrong digit is a mistake and locks your input for a few seconds. Three mistakes and the match is lost.
- When the clock runs out, the player with the most correct cells wins.
Climb from Bronze to Diamond
Ranked matches move you up — or down — the ladder.
- Win to earn points, lose and you give some back.
- Fill your level’s bar to level up: 25 levels across five arenas.
- Harder arenas give fewer clues, and a little more time to solve them.
- See where you stand on the global ranking, or just around you.
Play with friends
Friendly matches don’t touch your rank, so you can play whoever you like.
- Create a free account, then find friends by username or share your friend link.
- Challenge a friend in any arena you have unlocked.
- Send the challenge as a link — it opens straight into the game.
Practise without pressure
Warm up, learn a harder arena or just enjoy a calm puzzle.
- A stopwatch instead of a countdown, with no time limit.
- Mistakes still count, but they never end the game.
- Leave whenever you like and carry on later.
- Beat your best time in every arena.
Made for one-handed, five-minute battles
Notes, highlighting and a digit counter keep you fast, without getting in the way.
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Ready for your first battle?
Download Sudoku Battle and play your first ranked match in under a minute. No sign-up needed.