When you have two rows noted with the same number forcing the noted number into the third row, I call that TOMO, "The Odd Man Out" pattern. It comes up so often that it is goo to spot...
Likewise pairs of number in a box, will force additional pairs and thus through elimination force numbers into the remaining cells within a box. It is fortunate actually that there are an of elements, it forces the remainders to show themselves.
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