With the New York Knicks locked in a tight fight for the final playoff spot in the Eastern Conference, J.R. Smith hit the kind of shot that could end up making the difference between playing on and going home. Smith hit a 3-pointer for the lead with 1:04 left, and the Knicks held on to beat the Milwaukee Bucks 111-107 on Wednesday in a game that could turn out to be critical to both teams' playoff hopes.