The conventional responses are as follows.
|2||The negative response, showing 0-6 points|
|2||5+ hearts, 7+ points and game-forcing|
|2||5+ spades, 7+ points and game-forcing|
|2NT||Natural and game-forcing, with 7-10 HCP|
|3||5+ clubs, 7+ points and game-forcing|
|3||5+ diamonds, 7+ points and game-forcing|
|3NT||Natural and game-forcing (of course), with 10-12 HCP|
Opener's rebids after hearing a 2 negative response are below.
|Any suit||Natural, showing a 5+ card suit. Forcing to game. Responder isn't allowed to pass!|
|2NT||Balanced, 23-24 HCP|
|3NT||Balanced, 25-27 HCP|
|4NT||Balanced, 28-30 HCP|
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