XYZ Nice Loop
Close a loop through an XYZ-Wing's shared digit and an external strong link to derive eliminations beyond the wing alone.
All candidates have been entered in the empty cells.
A marks the three-candidate center and the two bivalue ends. Their common digit joins the two candidates in B and C through a two-place choice. Therefore, the connection closes a loop. Candidates 1, 2 and 4 marked × can be removed.