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