Sudoku Sprint

How to play

1. Choose a quick 6×6 puzzle or classic 9×9 Sudoku. The daily grid is the same for everyone on that UTC date; New puzzle makes another grid.
2. Fill each row, column, and outlined box with every number exactly once. For 6×6, each box is 2 rows by 3 columns; for 9×9, each box is 3 by 3.
3. Tap an empty square and a number below the board. On desktop, use number keys and arrow keys. Notes let you try possible numbers without a penalty.
4. A wrong guess adds 20 seconds. A hint fills one square and adds 45 seconds. The clock starts with your first move and pauses when the page is hidden.
5. Finish the grid to see your score, then share the exact puzzle link so a friend can try to beat your time.

Your unfinished puzzle and best time stay in this browser. There are no accounts, real-money prizes, or global rankings.