and (2) with four (or more) cards in each major suit, corrects to the previously unbid major suit. In the standard form of Stayman over 2NT, the responder has only two normal rebids. If the notrump bidder names a major suit and the responder has four cards in that suit, the responder bids four of the notrump bidder's suit (game). If the notrump bidder names a major suit in which the responder does not have at least four cards or bids diamonds to deny a major suit, the responder bids 3NT (game). If the notrump bidder has four cards in each major suit, the notrump bidder corrects to the previously unbid major suit. In either case, a responder who rebids notrump over a response in a major suit promises four cards of the other major suit. Thus, a notrump opener who holds at least four cards in each major suit should "correct" by bidding the other major suit at the lowest level. Of course, once a fit is found, responder who has sufficient strength also may bid 4 (Gerber) or 4NT (Blackwood), or cue bid aces, depending upon partnership agreement, to explore slam in any of the above sequences. Some partnerships also admit responder's rebids of a major suit that the notrump bidder did not name. A bid of 4 over an opening bid of 3NT may be either Stayman or Gerber, depending upon the partnership agreement. If an adverse suit bid is inserted immediately after a 1NT opening, Stayman may be employed via a double (by partnership agreement) or a cue bid, depending on the strength of his hand. The cue bid, which is conventional, is completely artificial and means nothing other than invoking Stayman. For example, if South opens 1NT, and West overcalls 2, North, if he has adequate values, may call 3, invoking Stayman. South would then show his major or bid game in notrump. Alternatively, North, if his hand lacks the values for game in notrump, may double, which by partnership agreement employs Stayman. This keeps the Stayman bidding at second level. Partnerships who have not yet learned Stayman but choose to adopt Stayman (without having yet learned or having chosen not to use Jacoby Transfers) will need to adjust their use of normal two-level responses after a 1NT opening, because the availability of this convention changes the nature of what had been normal 1NT responses.