Watch the first video on how to play the 2/1 bidding system. My advice would be to open this video up in YouTube . The links to all the other videos in this series are down below…
2 over 1 lesson 2 (2 over 1 continuations)
2 over 1 lesson 3 (2 over 1 continuations)
over 1 lesson 4 (The forcing 1NT continuations)
2 over 1 lesson 5 (The forcing 1NT continuations)
2 over 1 lesson 6 (Serious 3NT)