Sudoku. Lesson 23. Review. The swordfish pattern
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Sudoku. Tutorial #23 Hidden Matching pairs and other techniques.
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Sudoku Tricks: The Swordfish Pattern
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Swordfish Caught and Eaten! / Sudoku Tutorial #12
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Sudoku Tutorial #62. How to spot an X wing using rows, and then knowing what to do!
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Turbot Fish Explained with EXAMPLES
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Swordfish Sudoku: Pattern Recognition
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Tutorial 58. Hard sudoku puzzle with lots of techniques.
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