Boston Celtics guard Jordan Crawford (27) defends as New York Knicks guard J.R. Smith (8) shoots a 3-pointer in the first half of Game 2 of their first-round NBA basketball playoff series in New York, Tuesday, April 23, 2013. (AP Photo/Kathy Willens)NEW YORK (AP) — In what they regarded as a "should-win" game, the New York Knicks couldn't lose. Not the way they defended after halftime.