The great Aaron Nimzowitsch wrote the key sentence: Neither attack nor
defence is the essence of positional play, but prophylaxis! Prophylaxis
consists of different measures taken against the opponent’s tactical
threats and strategic plans. But don’t think that the prevention of your
opponent’s plan is purely defensive. It is simply part of the preparation
of our plan! This difficult, but extremely important subject is explained
on the DVD with the help of many examples, including classics but also
modern games. Video running time: 3 hrs 30 min.