Advanced Sudoku Solving Strategies

Singles Chains a.k.a Simple Colouring

Multi-Colouring

Y-Wing a.k.a XY-Wing

Y-Wing Chain

XY-Chains

XYZ-Wing

WXYZ-Wing

Aligned Pair Exclusion

Remote Pairs

Unique Rectangles

Guardian/Broken Wings

Death Blossom

Fishy Sudoku Solving Strategies

X-Wing

Sword-Fish

Jelly-Fish

Squirm Bag

Multivalue-X-Wing

Basic Sudoku Solving Strategies

Naked Pairs

Naked Triples

Naked Quads

Hidden Pairs

Hidden Triples

Hidden Quads

Intersection Removal