This chess course is aimed at the club and intermediate players and presents the theory and playing hooks in Open Games, appearing after moves 1. e4 e5 2. Nf3 Nc6 3.Bc4. The course presents the overview of the actual variants and 630 exercises for solve. This course is in the series Chess King Learn (https://learn.chessking.com/), which is an unprecedented chess teaching method. In the series are included courses in tactics, strategy, openings, middlegame, and endgame, split by levels from begi