A complete step-by-step guide to learning Sudoku, covering rules, scanning, naked singles, and pencil marks. Start playing today!

Master Snyder notation, a powerful technique for tracking candidates and solving harder Sudoku puzzles.

Understand the two fundamental rules of Sudoku and the overall goal of the puzzle.

Learn how to find hidden singles, a key technique for eliminating possibilities and solving Sudoku.

Discover how to identify naked singles, the easiest and most fundamental Sudoku solving technique.