YOUR DAILY LOGIC BREAK
Hard Sudoku
Explore hard Sudoku for a deeper logic challenge. Sign in and progress through city chapters to unlock Hard puzzles, save games and discover landmarks.
Guest play is Easy only. Registered players unlock Medium, Hard and Expert by completing six different levels in the preceding difficulty in each city.
Take time to compare candidates
Work methodically through candidate notes and eliminate possibilities that conflict with a row, column or box. Undo lets you revisit an entry while you practice.
How to play Hard Sudoku
Fill every row, column and 3 × 3 box with the digits 1–9, without repeating a digit. Select a cell and enter a number, or use notes to record possibilities. Notes, undo and hints are available in the game.
Daily Sudoku practice, at your pace
Make a puzzle part of your daily routine on a phone, tablet or computer. Choose from the existing puzzle collection whenever you want to practice. This is daily practice, rather than a shared puzzle that resets each day.
Save your journey
Play Easy as a guest without signing in. Create an account to save unfinished puzzles and progress between devices, and explore city chapters and landmark rewards.