1H OPENER'S REBID

BIDOPENER'S REBID AFTER 1H-1SOPENER'S REBID AFTER 1H-1NT1H/1S OPENER'S REBID AFTER A GAME-FORCING TWO-OVER-ONE MINOR-SUIT RESPONSE1H/S OPENER'S REBID AFTER A WEAK SINGLE RAISE FROM RESPONDEROPENER'S REBID AFTER FIT-JUMP IN SUPPORT OF MAJOROPENER'S REBID AFTER A PASSED-HAND 2C, SHOWING A WEAK HAND WITH THREE-CARD SUPPORT FOR A MAJOROPENER'S REBID AFTER A PASSED-HAND 2D, SHOWING AN INTERMEDIATE HAND WITH THREE-CARD SUPPORT FOR A MAJOROPENER'S REBID AFTER STRONG SINGLE-SUITED JUMP SHIFT
PassProhibited response; the fit-jump is a forcing bid.
Pass after doubleShows a non-horrible four-card suit, willing to play in the doubled conventional bid if partner has trumps too.
pass after doublePartial support for partner's suit, i.e. three cards.Natural, nothing to say.Partial support for partner's suit, e.g. three after 1S 2D, or a doubleton after 1S 2H.Not interested in raising pre-emptively. Denies having either (a) significant extra strength or (b) greater-than-minimum trump length.Partial support for partner's suit, e.g. three after 1S 2D, or a doubleton after 1S 2H.
RedoubleTo play, good five-card suit, but partner's allowed to take it out if unsuitable.
redoubleSignificant extra strength and not even partial support for partner's suit, i.e. either a singleton or doubleton. However not a void, because partner might gamble to play in the redoubled contract. Shows interest in doubling the opponents for penalties.Strong and unbalanced, shows interest in doubling the opponents for penalties and likely to hold values in any suit that partner has denied with their 1NT response.Not even partial support for partner's suit, either a singleton or doubleton. However not a void, because partner might gamble to play in the redoubled contract. Says nothing about strength, since the partnership is known to have at least game-going values.Shows game-forcing strength and an interest in possibly doubling the opponents for penalties.Not even partial support for partner's suit, either a singleton or doubleton. However not a void, because partner might gamble to play in the redoubled contract. Says nothing about strength, since the partnership is known to have at least game-going values.
1NT12-14 balanced, denies spades
New suitNatural (even if the opposition have overcalled in the suit), shows five of first-bid major and four of second suit.Natural (even if the opposition have overcalled in the suit), unbalanced.trial bidTrial bid, even at the 4-level. A hand that wants to cue bid can go via the Serious 3NT.natural and forcing, to be assumed to be a trial bidNatural (even if the opposition have overcalled in the suit), 5-4 shape, denies trump support
Rebid6 hearts, single-suited6-card suit, denies en route second suit unless at least 7-4 shape.Natural, denies en route second suit.to playnatural, denies trump support
ReverseNatural (even if the opposition have overcalled in the suit), reversing strength, unbalanced.
2 of minorNatural (even if the opposition have overcalled in the suit), 5-4 shape
2Snatural, unbalanced, reversing strength (normally 16+)
Raise4 spades, limit raise4-card support100% pre-emptive, to playtrump fit.
2NTGame-forcing, unbalancedGame-forcing, unbalanced.12-14 balanced. If the opening bid was 1S then opener is unlikely to have hearts as well, because we open 1H on a 12-14 4432 with both majors.game-forcingforcing relayGame-forcing, unbalanced. It's not to play, because a weak no-trump can't seriously want to play in 2NT opposite a known bad hand. Better just to sign off in the agreed trump suit as quickly as possible and hope that the opponents don't realise the situation.Game-invitational, showing an upper-range weak no trump with only four of the bid suit.12-14 balanced, no support for partner's suit
Jump rebidGood 6-card suit, at least reversing strength. Any continuation over this by responder in an uncontested auction is game-forcing.Reversing strength, single-suited with a good six-card suit and denying support for partner.to playBig six-card suit, reversing strength.
Jump rebid, e.g. 1H 1S 3HStrong (normally 16+) and single-suited, 6 hearts. Any continuation over this by responder in an uncontested auction is game-forcing.
3 of minorNatural (even if the opposition have overcalled in the suit), game-forcing, 5-4 shape
3 of a minorgame-forcing, 5+ hearts and 4+ of second suit, or 5-5 if a game-forcing 2NT rebid was available
Jump shiftnatural, game-forcingnatural, game-forcing
Jump raise, e.g. 1H 1S 3Sstrong (normally 16+), 5 hearts and 4 spades
Jump raiseMinorwoodto playTrump fit, reversing strength. If four of a minor, Minorwood.
Jump shift above reverseAuto-splinter, showing a singleton/void and a self-supporting trump suit. Game-forcing.
Jump shift below 4 of agreed suitsplinter
Unnecessary jump shift up to Splinter LevelSplinter, agreeing partner's trump suit and showing a small singleton or void. Splinters are normally game-forcing, but if two of them were available then the lower is merely invitational, e.g. 1C 1S 3D/4D are both splinters, since 1C 1S 2D would have been a reverse.Splinter, agreeing partner's trump suit and showing a small singleton or void. Splinters are normally game-forcing, but if two of them were available then the lower is merely invitational, e.g. 1C 1S 3D/4D are both splinters, since 1C 1S 2D would have been a reverse.
Jump shift at splinter levelSplinter in support of partner's suit, purely shape-showing, neither confirms nor denies extra high-card strength.splinter
3NTBased on a long, solid suit, i.e. akin to the equivalent bid had the opening bid instead been one of a minor. Shows a hand with lots of tricks off the top (seven or eight if partner is weak). Any continuation except four of opener's suit is investigating slam.Serious 3NTto playto play, if jump then a void in partner's suit
Raise fit-jump minorGame-forcing, not Minorwood
Raise fit-jump major3-card support, slam try
4 of minorsplinter
Jump raise to gameTo play, shape rather than strength
4-level rebidto play
Game-level rebidGood 7-card suit (missing at most one of the top four honours) that would be (a) happy in game opposite a void and (b) good for grand slam opposite that missing singleton honour.Good 7-card suit (missing at most one of the top four honours) that would be (a) happy in game opposite a void and (b) good for grand slam opposite that missing singleton honour. However the hand's nothing special in terms of high cards, probably 12-14 points or so.Good 7-card suit (missing at most one of the top four honours) that would be (a) happy in game opposite a void and (b) good for grand slam opposite that missing singleton honour.Good 7-card suit (missing at most one of the top four honours) that would be (a) happy in game opposite a void and (b) good for grand slam opposite that missing singleton honour.Good 7-card suit (missing at most one of the top four honours) that would be (a) happy in game opposite a void and (b) good for grand slam opposite that missing singleton honour. However the hand's nothing special in terms of high cards, probably 12-14 points or so.
4NTRKC Blackwood for spadesquantitative invitation to 6NT5-card support, 4 Key Cards. It's absolutely not Blackwood, since there's unlikely to be any such need for precipitate action. With a hand that wants to bid Blackwood, you'll just have to make a quiet waiting bid and see what partner does next.RKC BlackwoodBlackwood, for responder's suit if major
5 of majorinviting slam, asking about trump quality
5-level rebidquantitative invitation to 6 of suitquantitative invitation to 6 of suitCompletely solid trump suit, no losers even opposite a void. Responder's next bid is RKC Blackwood response, showing Key Cards.
Jump raise to 5Showing a trump fit (obviously) and all the key cards, i.e. all four aces and the king of trumps, which is already 19 points without even considering the rest of the hand. The advantage of this bid is that it bypasses a Blackwood bid that neither partner would have wanted to say. Your hand obviously has no interest in asking for key cards, while conversely your partner would have probably been nervous of doing so, having none himself. Further continuations (if any) are cue-bids, looking for a grand slam.4-card support for partner in an unbalanced hand, but without any key cards or small singletons.
Jump shift to Blackwood LevelExclusion Blackwood
5NTGrand Slam Forcequantitative invitation to 7NT
Jump shift to Grand-Hunting LevelComplete two-suiter. If the partnership had previously bid more than one suit and so there's ambiguity about which suits are being promised, then the other one is the first-bid suit of the player who just jumped.
Any slamNo systemic agreement; the natural interpretation
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Copyright 2015 Finn Clark.