At the time of the first edition, this opening was just becoming popular in Grandmaster chess. It soon became a hot item and for this edition we had over 20,000 games in our database. Champions of the defense include Grandmasters Agdestein, Dolmatov, Gleizerov (more than 100 games!), Glek, Karlsson, Moskalenko, Nikolic, Ulibin, and Vaisser. The theory is now pretty well established. I recommend that you start by studying the Overview below and looking at the games cited in the next paragraphs. I have concentrated on the lines most frequently seen in high level games. The opening is so absurdly transpositional that there is no way to organize it exhaustively. The most important thing is to note where the pieces usually land.