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SUPRGERB.NTA
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1995-08-30
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SUPER GERBER
Because a 4C bid over 3NT is often needed in the natural sense, and
a raise of 3NT to 4NT is usually natural, we need to devise an ace-
asking convention for this awkward situation:
Opener Responder
1S 2C/2D/2H
3NT 4C is natural, not Gerber
4NT is natural, not Blackwood
How to ask for aces? Solution: Use the lowest unbid suit other than
clubs, a variation of the convention known as Super Gerber:
Opener Responder
1D 3NT
4C/4D - natural
4H - Super Gerber
4S - notrump raise, implying weakish diamonds
4NT - stronger notrump raise
The 4C rebid is too valuable as a natural bid to be used as Gerber.
The 4S bid says that opener's diamond suit needs a good fit to be
useful in a notrump slam (e.g., five cards to only one of the top
three honors). When there is a conflict, Super Gerber takes
precedence over the 4S slam try in notrump:
Opener Responder
1H 2D
3NT 4C - natural
4S - Super Gerber
Another sequence that needs comment:
Opener Responder
1H 1S
3NT 4C - natural
4D - Super Gerber
It is true that in this sequence 4C is no more valuable than 4D as
a natural bid, but for the sake of a general rule we let 4C retain
its natural meaning and use 4D to ask for aces.
Unfortunately, we must have one exception to the general rule of
what bid to use for Super Gerber:
Opener Responder
1D 1S
3NT 4H - natural, not Super Gerber
4C - Gerber
The 4H bid in this particular sequence is too valuable as a natural
bid, so we revert to 4C as Gerber.
Responses
Responses are the same as for regular Gerber, except for the
necessarily higher ranking of the step responses:
Opener Responder
1S 2C
3NT 4D - Super Gerber
4H - 0 or 3 aces
4S - 1 or 4 aces
4NT - 2 aces, 0-2 kings
5C - 2 aces, 3-4 kings
To inquire about kings, the lowest unbid suit (which is often the
Super Gerber suit) is bid at the five level:
Opener Responder
1S 2C
3NT 4D - Super Gerber
5C 5D - asks about kings
The king-showing responses are similar to regular Gerber, except
for the higher level:
Opener Responder
1C 3NT
4D 4H - 0 or 3 aces
5D 5H - 0 or 4 kings
5S - S- king or the other three
5NT - H- king or the other three
6C - C- king or the other three
6D - D- king or the other three
6H - two kings, same color
6S - two kings, same rank
6NT - two kings, nothing in common
When the king-asking bid is 5H, as may sometimes happen, the two-
king response must be reduced to two bids:
5H (asking for kings) 6S - two kings, same color
6NT - any other two kings
If the Gerber bidder returns to a suit previously bid naturally,
that is a sign-off, as is a notrump bid. Remember that the lowest
unbid suit is used to ask for kings, sometimes saving bidding
space:
Opener Responder
1H 1S
3NT 4D - Super Gerber
4S 4NT/5H - sign-offs
5C - asks about kings
5D - forgot this agreement
When a strong jump takeout responder rebids 3NT, opener must use
Gerber to ask for aces--since 4NT would be a raise:
Opener Responder
1S 3C
3S 3NT
4D is Super Gerber
4NT - natural raise
The strong jump takeout responder cannot use Gerber, however; his
4NT bids are always Roman Key Card Blackwood, and other bids are
natural:
Opener Responder
1NT 3D
3NT 4NT - RKCB
4C/4D/4H - natural, forcing