2 shows game-forcing values (minimum strength determined by the opening 1NT range). It asks partner to bid his cheapest 4-card major, if he has one.
Opener's first priority is to show a 4-card major. Lacking one, he should bid 2NT or a minor suit.
|2||Shows 4 hearts.|
|2||Shows 4 spades and denies as many as 4 hearts.|
|2NT||Denies a 4-card major or 5-card minor. Opener's shape is 4432 or 4333.|
|3||Shows a 5-card club suit, and denies a 4-card major.|
|3||Shows a 5-card diamond suit, and denies a 4-card major.|
The major drawback of Double-Barreled Stayman is losing the ability to play
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