Sudoku Lesson 3 - Matching Sets, Pairs and Triples (Intermediate)

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An intermediate sudoku technique which identifies groups of cells where you know the numbers, but not the order they will be placed. This is a candidate elimination strategy that is very common, and can be used in nearly every puzzle above an "Easy" rating.
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You explain things very well, Cary. Thank you. I'll be referring to your site a lot.

stephenmneedham
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Wow! I learned not fast but, at least I learned.

leomacias
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3:40. Ehy below. It could 69 pairs at top instead of 15 so 9 could go to top. You should have explained clearly❓❓❓

alejan