Whether you're picking up a pencil for the first time or hunting for techniques to crack the toughest puzzles, these guides have you covered.
Beginner
Learn what Sudoku is, understand the rules, and master the essential techniques — scanning, elimination, and naked singles — that solve most puzzles.
Read guide →Advanced
Go beyond the basics with hidden pairs, X-Wing, Swordfish, and other patterns that unlock puzzles rated hard, expert, and beyond.
Read guide →Expert
Unique Rectangle and BUG+1 solve cells by exploiting the promise that a proper puzzle has exactly one solution — learn how, and when they're safe to use.
Read guide →Need help finding your next move?
Open the Solver →