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Stayman Convention
To use the Stayman convention selected the Stayman option in the Conventions Dialog.
Opposite an opening bid of 1 No Trump or 2 No Trumps the Stayman convention can be used. To bid the Stayman convention a player should hold:
11+ (weak no trump), 8+ (strong no trump or 2 no trump) points
at least one (and usually two) 4+ card major
a short suit.
To use Stayman bid 2 Club (over 1 No Trump) or 3 Club (over 2 No Trump) asking the opener to bid their lowest ranking 4+ card major suit. If they do not hold a 4+ card major they respond 2 Diamond.
If you are playing the Stayman convention and you hold a club suit with no other viable bid, bid clubs over a no trump opening then bid clubs again when partner has responded.
An alternative to Stayman over a 2 No Trump opening bid is to use the Baron Convention.