Real-time duel

Live Sudoku

Play Sudoku live: you and your opponent get the same board at the same second. Fill every cell correctly before they do — first to finish wins the duel.

Same board, same start

Duel board

One board for two players, a shared countdown, and a single winner. Whoever fills every cell correctly first takes the duel — are you in?

Free · no sign-up · starts in seconds

You
0/0
00:00
Opponent
solving… · 0/0

Waiting for the duel to start…

What Is Live Sudoku?

Live Sudoku turns a quiet solo puzzle into a real-time race. Instead of solving alone, you get an opponent, a shared board, and a countdown — and from the moment the duel starts, every correct cell moves your progress bar while theirs creeps forward next to it. The pressure completely changes how Sudoku feels: familiar logic, but with a clock in your chest.

Duels start instantly in the browser. There is nothing to install and no account to create: open the page, hit ready, and you are racing within seconds — on your phone or at a desk.

How a Live Duel Works

  • Same board, same start. Both sides receive the identical puzzle and begin on the countdown.
  • Live progress. You always see how many cells your opponent has filled — and they are watching yours.
  • Only correct counts. A wrong digit bounces off the board, so nobody can win by guessing.
  • First to finish wins. Complete the grid before your opponent to take the duel, then go straight into a rematch.

Warm Up Before You Duel

Racing rewards clean fundamentals: spotting singles fast, scanning rows and boxes without hesitation, and never stalling on one cell. If you want to sharpen up first, play a few relaxed boards or brush up on technique — then come back and put it on the clock.

Play Sudoku Relaxed solo boards across five difficulty levels. Daily Sudoku One shared puzzle every day — compare your time. Solve Sudoku Faster Practical speed tips that pay off in duels. Sudoku Solver Stuck on a puzzle from elsewhere? Scan or type it in.

FAQ

What is Live Sudoku?

Live Sudoku is a real-time way to play: you and an opponent get the same board at the same moment, and whoever fills every cell correctly first wins the duel.

How does a Sudoku duel work?

Press ready, wait for the 3-2-1 countdown, and solve. You see your opponent's progress bar move in real time next to yours. Wrong digits don't stick, so the race stays fair — only correct cells count.

Is Live Sudoku free?

Yes. Duels are free and start instantly in your browser — no sign-up, no downloads.

Can I play Live Sudoku on my phone?

Yes. The board, the number pad, and the progress bars are designed mobile-first, so duels feel natural on a phone.