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Strategies for solving sudoku puzzles

Basic Sudoku strategies
Basic strategies explained step by step for solving all sudoku number place puzzles.
 

• new puzzle Sudoku strategy
   
• candidates Sudoku strategy
   
• single candidate Sudoku strategy
   
• single position Sudoku strategy
   
• hidden candidate Sudoku strategy
   

Advanced Sudoku strategies
Advanced strategies explained step by step for solving all sudoku number place puzzles.

• Naked pair Sudoku strategy
   
• Naked triples Sudoku strategy
   
• Naked quad Sudoku strategy
   
• Hidden pair Sudoku strategy
   
• Hidden triple Sudoku strategy
   
• Hidden quad Sudoku strategy
   
• Interaction Sudoku strategy
   
• Multiple interactions Sudoku strategy
   
• Excluding chain Sudoku strategy
   
• Forcing chain Sudoku strategy
   
• X-wing Sudoku strategy
   
• Swordfish Sudoku strategy
   
• Jellyfish and Squirmbag Sudoku strategy
   

Free sudoku puzzles

Free diabolical sudoku puzzles
These sudoku are really hard and created by the author.

Strategies Sudoku - Frequently Asked Questions

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