Advanced Sudoku Tips: How to Break Through Hard Puzzles

Hard sudoku grid with a highlighted cell showing a naked single and other cells marked for advanced techniques

Easy and medium sudoku puzzles can usually be solved with basic scanning and elimination. Hard and expert puzzles are different. At some point the simple techniques stop working and you need a more systematic approach. These advanced tips will help you break through the toughest grids using nothing but logic. Why Hard Puzzles Feel Impossible… Continue reading on Advanced Sudoku Tips: How to Break Through Hard Puzzles