Sudoku Online: Multiplayer 1v1

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.