XYZ-Wing
Level: Advanced
An extension of the XY-Wing where the pivot holds three candidates.
The XYZ-Wing occurs when a pivot cell holds three candidates {X,Y,Z}, with two wing cells {X,Z} and {Y,Z}.
In any cell seen by all three cells, Z must go into one of the three cells no matter what, so you can eliminate Z from that shared cell.
It has stricter conditions than the XY-Wing, but using a three-candidate pivot makes it a step up in chaining technique.