Let's work backward here.
Last of all, this is a beautiful feed from Kristaps Porzingis, who sees that a mismatched Derrick Rose is fronting Carmelo Anthony in the post and that he has a slim but useful angle to get Melo an easy shot. If Rose didn't front, Melo would still have great position and a big height advantage, with the threat to kick out if help came.
Second of all, this is a wonderful identification of the mismatch by all the Knicks who start on the near side of the court. Porzingis, Arron Afflalo, and Langston Galloway all agree that Afflalo should clear out so the Knicks can exploit the Rose-Melo mismatch, either by posting him up or beating a front with a good entry pass.