Tutorial 53 Spotting a 3X3. A powerful technique in sudoku puzzles.

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A very important trick to know when doing hard puzzles.

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This video give you some hints on how to solve harder puzzles. Did you notice that there was a 12/12 hidden matching pair? Thanks to one of my advanced palyers for pointing this out. I cover hidden matching pairs in tutorial #23.
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Видео Tutorial 53 Spotting a 3X3. A powerful technique in sudoku puzzles. канала Sudoku Guy