A bid of the next step up (eg 2♥– Pass-2♠) as a negative response to a strong two opening bid. Over 2♠, some players use 2NT as the negative response, others 3♣.
A bid of the next step up (eg 2♥– Pass-2♠) as a negative response to a strong two opening bid. Over 2♠, some players use 2NT as the negative response, others 3♣.