XYZ-wing
A trivalue pivot with two bivalue pincers eliminates the shared candidate
How to use it
The xy-wing with the pivot carrying all three symbols: a pivot with candidates {x, y, z} and two pincers seeing it, one {x, z}, the other {y, z}. Whichever value the pivot takes — x, y or z itself — at least one of the three cells ends up being z. Every cell that sees all three therefore loses z.
The target set is smaller than the xy-wing's (common peers of three cells, not two) but the pattern is just as easy to spot: one trivalue cell next to two bivalue cells sharing its extra candidate.
Why it is sound
The pivot holds {x, y, z}; the pincers, seeing the pivot, hold {x, z} and {y, z}. Whichever of the three values the pivot takes, it is z itself or forces a pincer to z (x kills the first pincer's x, y the second's y). Every solution has z in at least one of the three cells, so any common peer loses z.
A worked example
The pivot r2c5 carries three digit candidates, {2, 3, 7}; two bivalue pincers see it — r6c5 and r5c5, both in column 5, each holding digit 3 as one of its two candidates. If the pivot is 3, it is 3 itself; if the pivot is 2, the pincer sharing that 2 must fall back on its 3; if the pivot is 7, the other pincer does. Every scenario puts a 3 somewhere in column 5, so a cell that sees all three of them cannot hold one: digit 3 dies at r4c5.