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- Known and Unknown in Sudoku
- How Many Sudoku Puzzles Are There?
- What Is the Minimum Number of Clues?
- Logical Strategies and Trial and Error
- 2. Starting Out
- 3. Naked Pairs
- 4. Naked Triples
- 5. Naked Quads
- 6. Hidden Pairs
- 7. Hidden Triples
- 8. Hidden Quads
- 9. Pointing Pairs
- 10. Box/Line Reduction
- 11. The X-Wing Family
- 12. Sword-Fish
- 13. Jelly-Fish
- 14. Generalizing X-Wing
- 15. Seeing Is Believing
- 16. Simple Colouring (or Chains)
- 17. Multi-Colouring, Types 1 and 2
- 18. Y-Wing Strategy
- 19. XYZ-Wing Strategy
- 20. WXYZ-Wing Strategy
- 21. Y-Wing Chains
- 22. XY-Chain Strategy
- 23. Remote Pairs
- 24. Forcing Chains
- The Dual Forcing Chain
- The Triple Forcing Chain
- 25. X-Cycles Introducing Nice Loops
- Nice Loop Rule 1
- Discontinuous X-Cycles
- Nice Loop Rule 2
- Nice Loop Rule 3
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- 26. Grouped X-Cycles
- 27. Alternating Inference Chains
- Grouped Alternating Inference Chains
- 29. Almost Locked Sets (ALSs)
- The Almost Locked Set XZ Rule
- 30. Almost Locked Sets in Chains
- 31. Finned and Filleted X-Wings
- The Sashimi Observation
- 32. Pattern Overlay Method
- 33. Fillet-o-Fish Strategy
- Filleting Generalized
- 34. Aligned Pair Exclusion
- Extended Aligned Pair Exclusion
- 35. Empty Rectangles
- 36. Sue-de-Coq
- 37. Death Blossom
- 38. Unique Rectangles
- Spotting the “Deadly Pattern”
- Type 1 Unique Rectangles
- Type 2 Unique Rectangles
- Type 2b Unique Rectangles
- Type 3 Unique Rectangles
- Type 4 Unique Rectangles
- Type 4b Unique Rectangles
- 39. The Hidden Unique Rectangle
- 40. Avoidable Rectangles
- Other Avoidable Rectangles
- 41. Bi-Value Universal Grave
- 42. Jigsaw Sudoku: The Law of Leftovers
- 44. Killer Sudoku
- 45. Cell Combinations Strategy
- 46. Innies and Outies
- 47. Cage Splitting
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