Autosave — Your current game is saved in your browser after every move. If you leave the page, you'll be able to resume exactly where you left off. Saves are kept for 7 days.
Shared stats — Your stats are shared with the Classic Sudoku 9×9 page. They're stored locally and never sent to a server.
Daily puzzle — The 📅 Today button loads the same puzzle for every player on a given day. It changes at midnight.
The daily puzzle offers a single sudoku 9×9 grid to every player, changed each day at midnight. The rules stay the same as classic sudoku: fill every row, every column, and every 3×3 box with the numbers 1 to 9, without repeats. Click 📅 Today to load today's challenge, or New to go back to a random grid at any time.
Since everyone solves the same grid on the same day, it's a great chance to compare your times with friends and family. Your stats (games, wins, streak, best times) are actually shared with the classic 9×9 Sudoku page.
It changes every day at midnight. Once a new day starts, a new challenge is waiting for you.
Yes, the New button generates a random grid at any time; the 📅 Today button goes back to the current daily puzzle.
Yes, stats (games, wins, streak, best times) are shared between this page and the homepage, since it's the same 9×9 game.
After solving a grid, click « ↗ Share result »: a text with your time, mistakes, and hints used gets copied, ready to paste anywhere.