Two Over One (2/1) is a natural, game-forcing bridge bidding system where a two-level response in a new suit over a one-level opening commits the partnership to at least a game contract. The 2/1 system is based on Standard American with 5-card majors, but it introduces a key difference: when the responder bids a new suit at the two-level over a one-level opening, the auction becomes forcing to game. This means the partnership cannot stop below game, allowing both players to explore the best contract without fear of being passed prematurely. Bring your game up a level by learning this essential system of bidding.