Defense to Two-Suited Overcalls
Invisible Cuebids allow the responder to describe more hands after the right hand opponent intervenes with a two-suited overcall, such as Unusual 2 No Trump or Michaels Cuebid. Responder's bid of the suit of the right hand opponent is similar to a cuebid, even though the suit of the right hand opponent has not actually been bid yet, hence it is called an invisible cuebid. The cheaper invisible cuebid is called Lo IQ in the table below. The other invisible cuebid is called Hi IQ. The following diagram show the possible responses of the partner of the opener.
Bid: Meaning After Unusual 2NT * After Michaels Cuebid ** 1 - 2 NT 1 - 2 Lo IQ: Limit Raise of better 3 2 Hi IQ: 10+ and 5+ cards in fourth suit 3 *** 2 **** Jump IQ: Game-forcing Splinter 4 / 4 3 / 3 Raise: 6-9 points 3 3 New suit: 6-9 and 5+ cards in suit 3 3 * Two lower unbid suits, in this case Clubs and Hearts ** Majors *** Shows Spades **** Shows Clubs
If you wish to include this feature, or any other feature, of the game of bridge in your partnership agreement, then please make certain that the concept is understood by both partners. Be aware whether or not the feature is alertable or not and whether an announcement should or must be made. Check with the governing body and/or the bridge district and/or the bridge unit prior to the game to establish the guidelines applied. Please include the particular feature on your convention card in order that your opponents are also aware of this feature during the bidding process, since this information must be made known to them according to the Laws of Duplicate Contract Bridge. We do not always include the procedure regarding Alerts and/or Announcements, since these regulations are changed and revised during time by the governing body. It is our intention only to present the information as concisely and as accurately as possible.
VulkaN...2020