Clearly, you need a few things to be in your favour before you even think about playing this type of shot. First of all, you’ve got to feel confident. Second, a little bit of an upslope would help – if it’s on a downslope forget it. Third, you need a pretty decent lie. If the ball is on hardpan or sitting in a slight depression you have to adjust
your thinking; I’d be playing a regular chip shot and take my chances on holing the 10- or 15- footer left.

Before I go ahead and play this (see over), let me stress that while this is is a shot you might play once in a blue moon during a tournament, practising it does wonders
for your confidence and also for your general wedge and
bunker play.
To get this spot on, you have to have total control of the delivery of the clubhead. And the better you get that, the better your short game generally.