Bridge base basic, also known as BBO basic, is a bidding system for the game of bridge based on the Standard American Yellow Card (SAYC).
[2] Like SAYC, BBO basic depends upon hand evaluation using the high card point (HCP) method.
Your partnership should be in a game-level contract when responder adds a minimum of 12 points to partner's promise of at least 13.
Unlike Standard American Yellow Card, where a strong jump shift is recommended,[3] responder shows a very strong hand in BBO Basic by using the "principle of slow arrival".
While this promises 6 points or more, information is needed to make the optimum contract.