40+ Technique Solver
Hidden Pair, X-Wing, Sue-de-Coq… an intelligent engine that explains every step.
40+ techniques, ranked mode, daily puzzles and live 1v1 duels. A premium Sudoku experience.
Try the mobile app
A platform that sharpens your mind, keeps you competitive, and helps you grow.
Hidden Pair, X-Wing, Sue-de-Coq… an intelligent engine that explains every step.
ELO system, seasonal leaderboards and live matchmaking. Race to the top in real time.
Five new puzzles every day, 30-day streak achievements. Track your consistency.
Register in 30 seconds, start playing immediately. Or try as a guest.
Casual fun or competitive ranked? Five difficulty levels for every taste.
Earn ELO, unlock achievements, win permanent badges at the end of each season.
Your account is ready in 30 seconds. Nothing to download.
Sudoku is a number-placement puzzle on a 9×9 grid. Place digits 1–9 so every row, column, and 3×3 box contains each digit exactly once. Pure logic, no math required — just careful elimination and pattern recognition.
Master these patterns to crack any difficulty. Each technique page includes a real solver-verified puzzle you can play.
Yes. Solo, multiplayer, daily challenge, solver and the technique library are all free with no account required.
Every day five new puzzles are released — one per difficulty. All players solve the same puzzle so the leaderboard is fair. Visit Daily to play and track your streak.
Yes. Upload the photo on the Sudoku Solver page; OCR detects the digits and the solver explains every move.
Not at first. Naked singles and hidden singles solve most easy and medium puzzles. Learn one new technique at a time from our technique library as puzzles get harder.
+10 points for each correct cell, −5 for mistakes (cannot go below zero), plus a finish bonus. Player with the highest score when the room ends wins.