Sudoku Challenge - Free Online Sudoku Puzzles

Play free Sudoku puzzles online with multiple difficulty levels: Easy, Medium, Hard, and Extreme. Enjoy daily challenges, compete in multiplayer tournaments, challenge friends to 1v1 duels with ELO ratings, watch game replays, and climb the leaderboards. No download or signup required — start playing instantly in your browser.

Features

• Daily Sudoku Challenges — a new puzzle every day
• Multiplayer Tournaments — compete against other players in real time
• 1v1 Duels — head-to-head matches with ELO rating system
• Game Replays — review and learn from completed games
• Global Rankings & Leaderboards
• Sudoku Solver — input any puzzle and get the solution
• Multiple Board Themes — Classic, Paper, Dark, and Zen