Most players play too many boasts
at an incorrect angle which is too wide and brings the ball
back towards the opponent (Shot A) enabling him to play a
choice of shots.
The more effective boast is to play the ball at a narrower
angle, further along the side wall, so that it hits the side
wall, then the front wall low and dies away from the opponent
before reaching the other side wall (Shot B).
When played in the correct proportion to deep straight and
cross court drives, the boast will generally force the opponent
to play a loose and obvious cross court which you can then
hit deep (straight or cross court), remembering to keep the
angle narrow so that it does not hit the side wall.