The main theme of volume 4 is prophylaxis, a concept first expounded by Nimzowitsch and one which has been brilliantly developed by Mark Dvoretsky and his pupils. The art of positional play is explained in terms of planning, maeuvring, the study of typical positions, and deep strategy in grandmaster games.
Artur Yusupov was ranked No. 3 in the world from 1986 to 1992, just behind the legendary Karpov and Kasparov. He has won everything there is to win in chess except for the World Championship. In recent years he has mainly worked as a chess trainer with players ranging from current World Champion Anand to local amateurs in Germany, where he resides.