Take a close look at the differences between the starting position (on the left) and the one after the technic has been applied (below). Once you fully integrate these into your mind you will be able to use this technic to solve problems on the puzzle.

Take a close look at the differences between the starting position (above) and the one after the technic has been applied (below). Once you fully integrate these into your mind you will be able to use this technic to solve problems on the puzzle.