RESPONSES TO AN OPENING 2NT
The purpose of transfers after an opening 2NT is to find a trump fit on hands that don't know where they want to play. There isn't room to use them for delicate investigation on hands that know what trumps will be, but want to know more about partner's hand anyway.
System remains on after a double, but is turned off after an overcall.
|3C||Stayman (ordinary four-card)|
|3D||transfer to hearts|
|3H||transfer to spades|
|3S||transfer to clubs|
|4C, 4D, 4H, 4S||Transfer to next suit. Super-accepts are banned at the four level.|
|4NT||quantitative invitation to 6NT|
|5 of a minor||to play|
|5 of a major||"pick a slam", 5440 shape with a void in the bid suit.|
|5NT||quantitative invitation to 7NT|
|any slam||To play, showing a no-loser trump suit at the six level. Not a transfer.|
|Cue-bid after overcall||Take-out, game-forcing, likely to have slam interest.|
|New suit after overcall||Natural, at least a five-card suit, game-forcing. Makes no promise as to suit quality.|
|Jump shift after overcall||If four of a minor or 4NT, it's ace-asking. Otherwise it's to play and possibly pre-emptive.|
|Double||Take-out if below 4S. To make a takeout double and then keep bidding even when partner pulls it is game-forcing and natural (showing only a four-card suit) up to 3NT or else above that a slam try, agreeing partner's suit. If you want to play in a part-score, all you can do is pass and hope partner finds a reopening double, then make your non-forcing bid.|
|Redouble||Wants to double the opponents for penalties.|
DEFENCE TO AN OPENING STRONG 2NT
All such bids are to be assumed to be weak and pre-emptive, so a reply from partner is non-forcing.