Solving Sudoku by Heuristic Search – David Carmel Blog
Very Easy Sudoku Puzzle Book For Beginners: 250 beginner level Sudoku puzzles. If you are new to Sudoku, you will also learn basics and simple Sudoku strategy in this book. (Beginner Sudoku):
sudoku | number game | Britannica
What is sudoku? How to solve, rules, benefits to the brain, explained.
Sudoku Master - Sudoku Puzzle - Apps on Google Play