Coup de Talon (heel kick) - the final capture is f5-d5-b5-b7x
If in a Coup de la Trappe the 'trap square' is opened by a backward capture, it is called a Coup de Talon (heel kick). A particularly ingenious example is given here. The final capture f5-d5-b5-b7x is extremely hard to visualize in the initial position