Y-Wing
Fish & Wings14 / 32A pivot and two pincers squeeze out a third digit.
Three cells with two candidates each: a pivot holding {A,B}, one pincer holding {A,C} that sees the pivot, and another holding {B,C} that also sees it. The pivot can't dodge both pincers.
If the pivot is A, the first pincer becomes C. If it's B, the second pincer becomes C. Either way, some pincer is C — so any cell that sees both pincers can't be.
See it in action
Step 1 of 4
The setup
Collect the bivalue cells (exactly two candidates). For each, treat it as the pivot and look among the bivalue cells it sees for the matching {A,C} / {B,C} pincer pair. Step through this real position to see it happen.
Practice
Find the Y-Wing and remove the shared pincer digit from every cell that sees both pincers.
Drill 1 of 29Tap a cell, then the candidate digit you want to remove.