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The Competitive
Sudoku Platform

Real-time 1v1 matches. ELO rankings.
Monthly SC League seasons.
Or practice solo in training mode — your choice.

Start Playing — Free Try a Puzzle
Expert 298h ago
TO
Tokani_caothu W 1:23
KA
KainG_caothu L
695
matches played today
real games happening right now
6
players online now
someone is waiting for an opponent
41,948
unique puzzles
across Beginner, Intermediate & Expert
RANKINGS

Who's on top right now?

Live ELO rankings — updated after every match.

🥇 ES ElGatoNegro 1,205 ELO 8W / 11G
🥈 GB Michael 1,203 ELO 21W / 33G
🥉
DI
 Dingle 1,138 ELO 2W / 5G
Full Beginner leaderboard →
Join the rankings — free
PLAY INSTANTLY

Try a puzzle right now

No account needed. Pick a difficulty and start solving.

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Ready to solve?
A fresh Beginner puzzle is waiting
No account needed  ·  Results not recorded
THREE DIVISIONS

Pick your arena

Each division has its own puzzle pool, ELO rating, and leaderboard.

Beginner
Puzzles10,496
Hints5 available
Max errors3

Simple logic, one candidate per cell. Great starting point.

Intermediate
Puzzles10,490
Hints3 available
Max errors3

Hidden singles, naked pairs, and locked candidates.

Expert
Puzzles10,482
Hints3 available
Max errors2

Advanced fish patterns, coloring, and wings. No mercy.

41,948 unique puzzles and counting

LATEST MATCH

Live Competition

Every match is a duel. Same puzzle, different strategies.

Beginner 20 min ago
JackMoor
13:44 · 0 err
WIN
VS
AC
Ace
13:44 · 1 err
LOSS
Watch Replay →
HOW IT WORKS

Three steps to glory

1
🎯

Queue Up

Pick your division. Hit play and get matched instantly.

2
⚔️

Solve & Compete

Both get the same puzzle. Race to finish faster with fewer errors.

3
📈

Climb Ranks

Win ELO, earn badges, top the SC League leaderboard each month.

🎓
SUDOKU ACADEMY

New to Sudoku? Start here.

Learn the rules, master solving techniques step by step — from Naked Singles all the way to Swordfish — and get practical tips to improve fast.

🟢 How to solve your first puzzle 📐 7 techniques with examples ⚡ Tips to improve your speed
Open Academy →
⚡

Real-Time 1v1

Matched against a real opponent. Same puzzle, different paths.

🧩

Solo Training

Not in the mood for competition? Practice at your own pace with unlimited puzzles.

🏆

ELO Rating

Dual rating: Global ELO + SC League ELO — resets each month for fresh competition.

🎬

Match Replays

Every game recorded move-by-move. Watch, learn, share.

📅

Daily Challenges

New puzzle every day. One shot, global leaderboard.

📺

Live Spectating

Watch matches live with AI commentator Eva.

🖨
Free & No login needed

Print Each Day Sudoku

Every day we prepare three fresh Sudoku puzzles — Beginner, Intermediate and Expert. Print them out, solve them with a pen. No screen required.

Today's Printable Sudoku

Start playing today

Free forever. No ads. No pay-to-win.

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Android app
Native app experience,
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