Andoku 2 Free is an excellent Sudoku puzzle game that comes with a user-friendly interface suitable for both beginners and experts. It features six variations and eight difficulty levels, totaling 10,000 puzzles. Each puzzle has a unique solution that can be found without guessing.

The game includes the following variations:

• Standard Sudoku
• X Sudoku
• Hyper Sudoku
• Percent Sudoku
• Color Sudoku
• Squiggly Sudoku

Key features of the game include:

• Automatic saving
• Pencil marks
• Multiple input modes
• Unlimited undo and redo
• Portrait and landscape orientation
• Support for phones and tablets

The game is designed to provide assistance according to your preferences.

Assistant options include:

• Automatic error checking
• Automatic pencil mark removal
• Pattern highlighting

This version is supported by ad revenue.