Start here! A complete step-by-step guide covering everything you need to know to begin playing Sudoku.
Learn the two fundamental rules that govern every Sudoku puzzle.
Learn the scanning technique to find hidden singles and solve puzzles faster. Step-by-step guide with examples and video.
The first technique every beginner should master - finding cells with only one possible number.
Learn to spot cells where only one number can fit - a fundamental solving technique.
Discover numbers that can only go in one place within a row, column, or block.
Identify two cells in a group that contain the exact same pair of candidates to eliminate them elsewhere.
Find two candidates that appear only in two specific cells within a group to remove other notes from those cells.
Scale up your logic. Spot locked sets of 3 or 4 candidates and learn why you never need to look for complex patterns like Pentas.
Learn the essential skill of using notes to track possible numbers and solve harder puzzles.
An efficient system for tracking candidates that will revolutionize your solving approach.
Ready for harder puzzles? Learn the techniques used by expert solvers.