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, manoeuvring, the study of typical positions, and deep strategy in grandmaster games.
Mark Dvoretsky (1947-2016) was known as ‘the strongest International Master in the world’ in the mid-1970s when he decided to pursue a career as a chess trainer. His students Artur Yusupov and Sergey Dolmatov became World Championship Candidates. A meticulous chess analyst, Dvoretsky wrote many highly acclaimed books, his most famous being Dvoretsky's Endgame Manual. He became so popular as a coach that dozens of world-class players repeatedly sought his advice.
Artur Yusupov was ranked third in the world from 1986 to 1992, just behind the legendary World Champions 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 World Champion Anand to local amateurs in Germany, where he resides.