Sudoku

What it does

Sudoku offers endless 9×9 puzzles in several difficulties: fill every row, column and 3×3 box with the numbers 1 to 9. Fast Mode lets you pick a number first and then tap all the squares it belongs in, and there is undo and erase. Solved puzzles put you on a scoreboard shared with the chat.

How to use it

1. Choose a difficulty
2. Tap an empty square, then a number (or use Fast Mode: number first, then squares)
3. Use Undo or Erase to fix mistakes
4. Solve the puzzle to land on the chat's scoreboard

Screenshots