Who am I? Tactician or position player? Attacker or defender? Should I play 1.d4 or 1.e4? Sicilian or French? If you know your strengths and weaknesses you will score more points and you will be more successful. In their "Player Types" ChessBase course Karsten Müller and Luis Engel take a close look at playing styles, and in an extensive interview Karsten Müller reveals a few things they discovered.