5 is the long option, on a pass to 3 he comes back to the ball, 2 goes long opposite, 4 stays in the middle. 3 can skip it back to 1, behind ball level.
Billy Donovan - against a halfcourt trap, always change sides of the floor before the halfcourt line.
Tom Crean - against a 1-3-1, be in a 2-1-2 set and engage the big at the centre by having your strongest guard sit on his thighs looking for the ball, then turn and look opposite on every catch.
breakthroughbasketball.com - facing a halfcourt trap, it's important to reverse the ball a few times until you can advance it to a safe spot.