10 Advanced Sudoku Techniques to Master Difficult Puzzles
Beyond Basic Sudoku: Advanced Techniques Once you’ve mastered the fundamentals of sudoku, you may find yourself stuck on harder puzzles where basic scanning and elimination aren’t enough. This guide introduces 10 advanced techniques that expert solvers use to crack even the most challenging puzzles. Before You Begin: Prerequisites These advanced techniques assume you’re comfortable with: Pencil marks (candidates): Marking possible numbers in each cell Naked singles: Cells with only one possible candidate Hidden singles: Numbers that can only go in one place in a row/column/box Naked pairs/triples: Sets of cells that must contain specific numbers If you’re not familiar with these basics, start with our Beginner’s Guide first. ...