Sudoku strategies
Plain-English guides to the techniques that solve Sudoku puzzles without guessing. Start at the top and work down.
Naked and hidden singles
The two moves that solve most Easy and Medium puzzles.
Read the guideNaked pairs and triples
Use pencil marks to clear candidates when two cells share the same two options.
Read the guidePointing pairs and box–line reduction
When a number in a box is stuck on one line, it rules that number out of the rest of the line.
Read the guideX-Wing
An advanced pattern for Expert puzzles, built from two rows and two columns.
Read the guide