Kokish Relay (Birthright)

The Kokish Relay is used to show hands of 25+ points, without consuming too much bidding space. Playing Standard American opening would start with 2 (Two Clubs 19 To 21) and after partner's 2 negative response opener bids 2 which forces responder to bid 2 so that opener can describe his hand further:

This convention is also known as Birthright.