Sudoku Techniques
Learn Sudoku solving techniques in order of difficulty. Explore how each technique works with examples.
45 techniques
Basic
Hidden Pair
Hidden Single
Naked Pair
Naked Quad
Naked Single
Naked Triple
Intermediate
Box/Line Reduction
Hidden Quad
Hidden Triple
Pointing Pairs/Triples
X-Wing
Hard
2-String Kite
BUG+1 (Bivalue Universal Grave)
Empty Rectangle
Finned X-Wing
Rectangle Elimination
Remote Pairs
Simple Colouring
Skyscraper
Swordfish
Unique Rectangle
W-Wing
X-Cycles
XY-Wing
XYZ-Wing
Very Hard
3D Medusa
Extended Unique Rectangle
Finned Swordfish
Grouped X-Cycles
Hidden Unique Rectangle
Jellyfish
WXYZ-Wing
XY-Chain
Extreme
Aligned Pair Exclusion
Almost Locked Sets (ALS-XZ)
Alternating Inference Chains (AIC)
Bowman's Bingo (Nishio)
Cell Forcing Chains
Death Blossom
Digit Forcing Chains
Junior Exocet
Nishio Forcing Chains
Pattern Overlay
Sue de Coq
Unit Forcing Chains