Visualization Techniques for Solving Sudokus in 5 minutes: Techniques, Strategies, Training Methods and Timing Charts for Hard and Extreme Sudokus More Books by Mike Colloby

How to Become a Top Sudoku Player : Techniques, Puzzles, Examples, Training Methods and Timing Charts for Hard and Extreme Sudokus How to Become a Top Sudoku Player : Techniques, Puzzles, Examples, Training Methods and Timing Charts for Hard and Extreme Sudokus
How to Become a Top Sudoku Player : Techniques, Puzzles, Examples, Training Methods and Timing Charts for Hard and Extreme Sudokus
2011