Sudoku
Free online Sudoku with a daily challenge — the same puzzle for everyone, updated every day. Three difficulty levels, automatic conflict checking, playable on mobile and desktop, and a shareable result card.
Mode
Time00:00
DifficultyDaily
Date2026-09-06
💡 Tap a cell then press a number; each row, column and box needs 1-9. Daily challenge is the same for everyone, updated every day
FAQ
What are the rules of Sudoku?
Every row, column and 3×3 box must contain the digits 1-9 with no repeats. Fill all 81 cells without conflicts to win. Every puzzle has exactly one solution and can be cracked with pure logic — no guessing needed.
What is the daily challenge?
A fixed puzzle updated every day — everyone in the world gets the same one, so you can compare times. After finishing you can generate a result card to save or share.
Does it warn me about mistakes?
Yes. When a digit repeats in the same row, column or box, the conflicting cells turn red and recover automatically once fixed. The black givens are fixed clues and cannot be changed.