Sudoku play online

This is a classic Sudoku puzzle game. It comes with 4 level of difficulty: Easy, Medium, Hard and Extreme. Whether you are a Sudoku advanced player or beginner, this is a perfect Sudoku game for you. It has a pencil mode which you can make a note. If you are stuck, you can reveal a cell. You can have option to highlight duplicate numbers within the same row, column or block. The best part is all incomplete game progress will be saved!

Main features:
- 4 difficulty levels: Easy, Medium, Hard, Extreme
- 2000 puzzles. 500 puzzles per difficulty level
- Pencil mode to make notes
- 2 number entering modes: Tap the number row to set number in cell or long press to lock the number for multiple use
- Settings to highlight duplicate numbers within same row, column and block
- Settings to highlight same row, column and block
- Save progress for all incomplete levels.
- Remaining number count
- Pause game
- Best time