After White's first move, it is usually Black, who determines the character of the game. The Keymer System 1.Nf3 and 2.e3 is an attempt from White to steer the game into lines and structures White likes. On his first Fritztrainer the young Indian Grandmaster Leon Mendonca shows the potential and the advantages of the Keymer System. Christian Höthe took a look at the course.