Many White players have the starting moves 1.c4 and 1.Nf3 in their repertoire to be flexible and possibly enter preferred variations through move transitions.
Grandmaster Niclas Huschenbeth suggests to reply to both moves with 1...c5 and presents a complete Black repertoire in a total of 14 videos.
The advantage of the reply 1...c5 lies in the fact that move transitions to d4-systems are not possible anymore. This video series is intended for advanced players.
Learn a complete black repertoire against the moves 1.c4 and 1.Nf3, update your theoretical knowledge and play the opening like a grandmaster!
GM Niclas Huschenbeth talks about the structure of the video series and how you can take the most away from it. Besides solving the video exercises, Niclas recommends going through the variations in the eBook. Additionally, he emphasizes that you can post any questions directly below the videos.