Sudoku Techniques & Strategies
Learn Sudoku solving techniques — naked singles, hidden singles, elimination, and more. Free guides for every skill level.
How to Play SudokuA complete beginner guide to classic 9×9 Sudoku — rules, first steps, pencil marks, and how to finish your first puzzle.Sudoku Tips for BeginnersPractical habits that speed up beginners — scanning patterns, pencil marks, difficulty progression, and common mistakes to avoid.Naked Single Sudoku StrategyLearn the naked single technique — when a cell has only one possible candidate left and how to spot it quickly.Hidden Single Sudoku StrategyMaster hidden singles — when a digit can only go in one cell within a row, column, or 3×3 box.Sudoku Elimination by Row, Column, and BoxUse cross-elimination across rows, columns, and 3×3 boxes to narrow candidates and unlock the next move.Pointing Pairs and Triples in SudokuLearn pointing pairs and triples — an intermediate technique that unlocks many Medium puzzles.When (Not) to Guess in SudokuProper Sudoku puzzles have a unique logic-only solution. Learn what to try before guessing and how hints help you learn.