This is a special and specialized opening bid, which asks partner directly how many Aces he holds. There is no question that the opener has at least sufficient playing tricks to make slam, and is asking partner to tell him whether he has any Aces or not. If the partner does hold a specific Ace, then the opener could bid a grand slam. The responses inform the opener about the number of Aces and the location of the Aces. A typical holding would be:
Responses of the Partner to 4 No Trump are:
5  : |
Shows no Ace |
5  : |
Shows the Ace of Diamonds |
5  : |
Shows the Ace of Hearts |
5  : |
Shows the Ace of Spades |
| 5 NT: |
Shows Two Aces, unspecified |
| 6 : |
Shows the Ace of Clubs |
This is the entire opening with the corresponding responses by the partner. The employment of this particular conventional method should only be utilized when the holding shows only one Losing Trick and the opener is only interested in the number and location of possibly held Aces.
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.
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