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The term two over one (abbreviated as 2/1) usually describes a non-jump new suit bid at the two level after a natural one level suit opening. The following sequences are two over one sequences:

Response Edit

In natural systems, a two over one response promises at least invitational strength and at least a four card suit. It is forcing and promises a rebid unless responder bids game.

However, in the 2/1 game forcing system, these responses by an unpassed hand forces the auction to the game level, hence the name (although some don't play 1 - 2 as game forcing).

Overcall Edit

A two level non-jump overcall after a one level opening guarantees five of the suit and usually with full opening strength. However, it may be lighter if at MP scoring, favourable vulnerability or at balancing position.

See also Edit

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