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The Gerber convention is a 4C jump response to a no-trumps bid. Like Blackwood, it is a slam investigation bid that asks partner how many aces he holds.
- Exclusion Blackwood
The original 4NT convention invented by Easley Blackwood to...
- Bidding Principles
Bridge Bidding Conventions Hundreds of bridge bidding...
- Meckwell Defense to 1NT
Astro A defense to 1NT in which a double is for penalty, and...
- Bidding Systems
Bridge World Standard by The Bridge World A natural 2/1...
- Stayman
Stayman is usually not used with 4333 shape, since this...
- Exclusion Blackwood
The ACBL nominated John Gerber to the "Hall of Fame", offering the following testimonial: John Gerber won fame as a player, as a strong team captain and as the inventor of the ace-asking 4 bid that bears his name.
Because a raise to 4NT is usually invitational, you need an ace-asking device. John Gerber invented his now oft-misused convention so that after a 1NT or 2NT bid , a jump to 4 asks for aces. The responses are: 4 =0 or 4, 4 =1, 4 =2, 4NT=3.
The 4 clubs Gerber is a response to a no-trumps bid. Like Blackwood, it is a slam investigation bid that asks partner how many aces he holds. The difference from Blackwood is that Gerber is only used for no-trumps. This is because 1NT-4NT is natural, inviting partner to bid 6NT.
Gerber Convention. Developed by John Gerber in order to learn the number of Aces for NoTrump Slams. Blackwood Convention is not efficient for NoTrump Slams, because it is hard to understand if the bidding 5 NT is Game or a question for the number of Kings.
A bid of 4♣ initiates Gerber and is asking Partner for Aces. Once the process is started, precise answers are essential. Partner responds according to how many Aces are in his/her hand. Just like Blackwood, the bids go up the line. 4♦ = 0 or all 4 Aces (1 bid higher up the rank than 4♣) 4♥ = 1 Ace 4♠ = 2 Aces 4NT = 3 Aces
The Gerber convention uses the bid of 4 Clubs to ask partner to communicate by a bid the number of held Aces, and subsequently how many Kings. According to the concept, as soon as a suit or No Trump has been agree upon, preferably No Trump, the responder will bid 4 Clubs to ask for Aces.
