XY Notrump (also known as Two Way Checkback and Two Way New-Minor-Forcing) is a bidding convention in contract bridge.
Using the convention
After opener's one of a suit (X), partner's one of a suit response (Y) and opener's 1NT rebid (a very common sequence), 2 from opener's partner forces 2 from opener. Holding a weak hand with diamonds, one can now pass. Other bids are invitational, describing also the nature of the hand. A 2 response to 1NT, however, is game forcing with any hand. Responder may also jump to 3 of any suit (except 3, which is signoff) to show a slam-invitational hand with good suit(s).
Examples
For example, on the sequence 1-1 (with or without opponent's interfering);1NT-2;2,2 will show an invitational hand with minimum five spades and four hearts, 2 an invitational hand with minimum five spades (in which case one does not have four hearts) or possibly six spades with or without four hearts. 2NT will show a balanced invitational hand, 3 typically an unbalanced invitational hand with club support. However, when one instead forces game with 2, opener will immediately start describing his own hand. He may, on basis of the aforementioned auction, with 2 being the only difference, bid 2 holding four hearts, 2 holding three card spade support, etc. Further bids are primarily natural.
Advantages
XY Notrump gives very good control finding both games and slams, as the final "mission" of the sequence is established at a relatively early stage of bidding.
Playing, as very common in combination with XY no trump, the
Walsh convention :''See the Glossary of contract bridge terms for an explanation of unfamiliar words or phrases.''
Walsh is a convention used in the card game of bridge in response to an opening bid of 1. The convention has its origins in the Walsh System develope ...
or even
Transfer Walsh Transfer Walsh is a bidding convention used in contract bridge. After a 1 opening bid, responses of 1 and 1 show heart and spade suits respectively. The "Walsh" terminology refers to the fact that these bids may conceal an equal or longer diamond su ...
, one still has the chance of stopping in 2 on weak hands, often impossible using for example
Checkback Stayman
Stayman is a bidding convention in the card game contract bridge. It is used by a partnership to find a 4-4 or 5-3 trump fit in a suit after making a one (1NT) opening bid and it has been adapted for use after a 2NT opening, a 1NT overcall, an ...
.
Variations
A popular expanded version of XY Notrump is the so-called "XYZ
meaning the principles of regular XY Notrump is valid even after one of a suit (X) - one of a suit (Y); one of a suit (or notrump) (Z) auction. It replaces such a method as
Fourth suit forcing.
See also
*
Walsh convention :''See the Glossary of contract bridge terms for an explanation of unfamiliar words or phrases.''
Walsh is a convention used in the card game of bridge in response to an opening bid of 1. The convention has its origins in the Walsh System develope ...
*
XYZ convention
*
Transfer Walsh Transfer Walsh is a bidding convention used in contract bridge. After a 1 opening bid, responses of 1 and 1 show heart and spade suits respectively. The "Walsh" terminology refers to the fact that these bids may conceal an equal or longer diamond su ...
*
New minor forcing New Minor Forcing (NMF), is a contract bridge bidding convention used to find a 5-3 or 4-4 major suit fit after a specific sequence of bids in which opener has rebid one notrump. The convention is triggered by responder at his second turn by an arti ...
*
Checkback Stayman
Stayman is a bidding convention in the card game contract bridge. It is used by a partnership to find a 4-4 or 5-3 trump fit in a suit after making a one (1NT) opening bid and it has been adapted for use after a 2NT opening, a 1NT overcall, an ...
Notes
A publication on the XYZ variation of the XY Notrump conventionA system publication based on Baard Olav Aasan methods, concerning particularly Transfer Walsh and XY no trump (in Norwegian)
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Bridge conventions