Opening Repertoire: Nimzo and Bogo Indian
                                
                                
                             
                            
                         
                            
                            
                        Christof Sielecki presents a repertoire for Black against mainline 1 d4, with the Nimzo-Indian and Bogo-Indian defenses. Sielecki focuses on lines where Black adopts a dark-square strategy. This creates a system-type approach linking variations to a common theme, making the repertoire much easier to learn and understand.