But this isn't simple elimination in that more than one number at a time is being evaluated. A "simple elimination" is the 9 in C8 due to the the 9s in F7 and J6. I've seen no method discussed which evaluates multiple concurrent possibilities.

I don't claim to be the first and only person to have noticed this but I haven't seen anyone describe it just as I never saw anyone describe my "Uniqueness" strategy. Shortly after posting that method I was sent a link to some buried Times article which I'd never seen and which was similar but not as clearly described. I also initially sent off my "discovery" to a sudoku site months before that article appeared.

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