This course teaches play in key opening positions in open games (1.e4 e5 except 2.Nf3). These sharp openings for White were especially popular with the great chess players of the past, including Steinitz, Spassky, and Bronstein. In these openings, the cost of a mistake is high, and it is necessary to know or be able to find the only correct move. By solving the exercises in this course, you can better understand the subtleties of these openings and avoid mistakes in key opening positions during actual games.