Sudoku Online: Multiplayer 1v1

Challenge a friend to a real-time 1v1 Sudoku duel, or solve hundreds of classic puzzles offline. Now in English, Spanish, Catalan, German and French.

Play Sudoku online against friends in real-time 1v1 duels, or train your brain with hundreds of classic Sudoku puzzles offline. Same grid, two players: the faster solver wins.

MULTIPLAYER SUDOKU — REAL-TIME 1V1 • Create a private game and share the code with a friend, or join a public game against a random opponent. • Both players solve the same Sudoku at the same time; every correct number scores a point. • Wrong numbers cost you a time penalty, so think before you tap. • Watch your rival's progress live and race to fill the grid first.

CLASSIC SUDOKU — SINGLE PLAYER • Hundreds of hand-picked puzzles in four difficulties: easy, medium, hard and expert. • Progress and best times are saved on every puzzle, so you can pick up where you left off. • Play offline, anywhere: on the train, in bed, on a break.

DESIGNED FOR FOCUS • Pencil notes: long-press a cell to jot down up to three candidate numbers. • Clean, distraction-free board with big, readable numbers. • Relaxing music and sound effects you can mute with one tap. • Available in English, Spanish, Catalan, German and French.

HOW TO PLAY

1. Pick Single player and a difficulty, or Online multiplayer to start a duel.
2. Tap a cell, then tap a number. Long-press to add notes.
3. Fill the grid — or fill more cells than your opponent — to win.

Whether you want a quick logic puzzle or a competitive number game with friends, Sudoku Online is the Sudoku app that makes solving social. Download it and challenge someone today.