This convention is alertable. Bergen raises are conventional raises of a 5-card major suit opening. After a 1♥ or 1♠ opening, a 3♣ response shows 4-card minimal support, while a 3♦ response shows 4-card invitational support. It is usually played with Jacoby 2NT. Bergen raises are developed as an application of the law of total tricks, which indicates that one should compete at the 3-level with 9-card trump fit regardless of strength. Responses