AUCTIONS AFTER A GAMBLING 3NT

Pass/redoubleto play
4Dshape-asking, wanting to know about partner's singletons.
either minor at any level, except 4Dpass-or-correct, e.g. with strong holdings in the majors, a diamond void and four small clubs you might bid a pass-or-correct 5D.
4 of a majorto play
4NT4 top tricks, asks opener to bid 6NT with an eight-card suit.
4+NT if a passed hand"please bid your minor", like a pass-or-correct 5C except that partner is definitely going to play the hand.
5 of a majorLooking for a grand slam in partner's suit. Shows a hand that's ruffing the splintered suit (either void or stiff ace) and exactly three top tricks in the other suits. Partner should bid the grand slam if holding something like 7321 with three cards in the splintered suit, i.e. has enough length opposite partner's shortage that you'll get enough ruffs for the grand slam, while there's no need for more than three top tricks in the other suits.
5NT5 top tricks, asks opener to bid 7NT with an eight-card suit. With only a seven-card suit, they bid 6NT.
any slamto play

DEFENCE TO A GAMBLING 3NT

Doublepenalties
Suit overcallnatural, game-forcing
4NT overcallStone Age Blackwood (4C is 0/4 aces, 4D is 1 ace, etc.)
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Copyright 2015 Finn Clark.