One over one means bidding at the one level after a one level bidding.

Response Edit

In natural bidding, a one over one response by an unpassed partner is unlimited (6+ HCPs) and forcing for one round. It guarantees four cards of the suit (some plays 1-1 to be 5+ s).

Overcall Edit

A one over one overcall normally specifies about 8+ HCPs and 5+ of the suit. However, depends on vulnerability and scoring, sometimes a weaker hand or a strong hand with only 4 of the suit may overcall.

See also Edit

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