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Sudoku Strategie and Video Tips
The Ultimate Sudoku Guide
Beginner
Moderate
Hard
Expert
Goal of the game
1. No duplicates of the numbers 1-9 horizontally.
2. No duplicates of the numbers 1-9 vertically
3. No duplicates of the numbers 1-9 in the 3x3 cell groups
Click on a cell and use your keyboard to type in the numbers
Index 21 Tips.com