In football, the area around the center line is usually a hazard-free space. But in chess, when a knight crosses the centre line – i.e. if it jumps from his own half of the playing field to that of the opponent – then it "usually sends a clear attack signal", writes Oliver Reeh in his tactics section in ChessBase Magazin #211. His collection of tasks in the new edition includes 38 games, which are peppered with many training questions. Attacking knights play an important role in almost all cases. We would like to present the first three tasks from the collection as well as an excerpt from his first interactive video here. Have fun!