Puzzle string:
Sudoku
- Sudoku
- Play Sudoku
- Play Sudoku
- Basic Strategies
- Singles in Rows, Columns, and Blocks Strategy
- Naked Pairs, Naked Triples, Naked Quads Strategy
- Hidden Pairs, Hidden Triples, Hidden Quads Strategy
- Pointing Pairs, Pointing Triples, Intersection Removal Strategy
- Box/Line Reduction Intersection Removal Strategy
- Advanced Strategies
- X-Wing Strategy
- Simple Coloring (Singles Chains) Strategy
- Y-Wing Strategy
- Rectangle Elimination
- Swordfish Strategy
- Challenging Strategies
- X-Cycles Strategy
- XY-Chain Strategy
- 3D Medusa Strategy
- Unique Rectangle Strategy
- Hidden Unique Rectangle Strategy
- XYZ-Wing Strategy
- Utilities
- Sudoku Solver - Unique or Multiple Solution Finder
- Evaluate Sudoku Puzzle Difficulty - How easy or hard is it?
Thonky's Sudoku
- Table of Contents
- Sudoku Main Page
- Play Sudoku
- Play Sudoku
- Basic Strategies
- Singles in Rows, Columns, and Blocks Strategy
- Naked Pairs, Naked Triples, Naked Quads Strategy
- Hidden Pairs, Hidden Triples, Hidden Quads Strategy
- Pointing Pairs, Pointing Triples, Intersection Removal Strategy
- Box/Line Reduction Intersection Removal Strategy
- Advanced Strategies
- X-Wing Strategy
- Simple Coloring (Singles Chains) Strategy
- Y-Wing Strategy
- Rectangle Elimination
- Swordfish Strategy
- Challenging Strategies
- X-Cycles Strategy
- XY-Chain Strategy
- 3D Medusa Strategy
- Unique Rectangle Strategy
- Hidden Unique Rectangle Strategy
- XYZ-Wing Strategy
- Utilities
- Sudoku Solver - Unique or Multiple Solution Finder
- Evaluate Sudoku Puzzle Difficulty - How easy or hard is it?