Sudoku Classic - Killer Sudoku 4+

Challenge your brain with this amazing Sudoku free game. Play and have fun!

CHALLENGE YOUR BRAIN
Hundreds of classic sudoku puzzles to test your skills.
Beautiful and intuitive interface, many options and great gameplay.
Perfect for both beginners and advanced players.

Relax and have fun in the campaign mode. With increasing difficulty, bonus levels and rewards as you progress in the game.

If you want to challenge a puzzle that fits your skills or your mood at the moment, choose the difficulty level (easy, medium, hard, evil and impossible) in the classic mode. You can also complete the daily challenges with puzzles with random difficulty levels and build up your trophy wall every month.

Got stuck? Use the intelligent hints to help solve the puzzle and also learn Sudoku techniques from it.

KEY FEATURES
- Hundreds of puzzles, different game modes
- Classic mode - with 5 difficulty levels, from easy to impossible
- Campaign mode - with bonus levels and rewards
- Daily Challenge - new puzzle every day, collect trophies
- Intelligent Hints - to help you solve the puzzles
- Pencil notes - update notes automatically whenever a number is positioned
- Highlight duplicates to avoid repeating numbers in a row, column and block
- Themes - 4 different themes, including dark mode for better eye comfort
- Auto-save - pause and continue game without losing any progress
- Stats - to help you track your performance and compare with others
- High scores, achievements and leaderboards

And many other features and options:
- Undo and Erase buttons
- Music and Radio
- Sound effects
- Timer
- Error limit: challenge yourself by limiting the number of errors per game
- Automatic error checking: highlight the numbers that do not match the final solution
- Lock a number to place it in multiple cells without using the keypad
- Hide completed numbers
- Highlight identical numbers
- Highlight each cell's row, column and block

Can you solve this puzzle? Play and have fun!