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Slam Bidding - Gerber Convention Ace Asking 

 
If you or your partner have bid notrump at any level in the auction, you should not use 4 NT to ask for the number of aces held. You must use a different asking bid to find out this information. Gerber Convention is an alternative which is very popular and it has the added benefit of starting at a much lower level.

Asking for Partners Aces - Gerber

After you have discovered that your partnership has at least 33 combined points and the suit or lack of suit fit the Gerber is a bidding convention designed to describe the Aces held in partners hand to decide whether a grand slam or a small slam can be achieved. Gerber is usually invoked by one of the partners jumping to 4♣  where the club suit has not been bid by your side in the current auction.

Your partner's responses to your jump bid to 4♣ Gerber Convention is as follows:

 

Partners
Gerber Bid  
Your
Reply  
 What your response means   Bidding Sequence  
           
4 4  0  or all of the Aces (its usually very easy to tell)
 4 - 4
4 4  1 Ace  4 - 4
4 4  2 Aces  4 - 4
4 4 NT  3 Aces  4 - 4 NT

Table of responses to Partners Ace Ask



Practice your Gerber Ace Asking Responses


   4
   4
   4
   4 NT



   4
   4
   4
   4 NT



   4
   4
   4
   4 NT



   4
   4
   4
   4 NT



   4
   4
   4
   4 NT







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