The XYZ Convention

The XYZ convention in bridge gives responder one structure for the second bid after any three bids at the one level, such as 1♦ - 1♥ - 1♠, 1♣ - 1♥ - 1NT or 1♥ - 1♠ - 1NT. That second bid has several jobs at once. It must sign off with a weak hand, invite with a medium one and set up a game force with a strong one, often while still looking for a 5-3 major fit. Natural methods handle some of these badly, and the alternative is a different convention for each auction.

The name comes from the three bids. X is opener's opening, Y is responder's one-level response and Z is opener's one-level rebid. After X - Y - Z, responder has two artificial bids:

• 2♣ is a puppet. Opener must bid 2♦. Responder then passes with a weak diamond hand or makes an invitational bid, which opener can pass or accept.
• 2♦ is artificial and forcing to game. It says nothing about diamonds and asks opener to describe the hand further.

Every other rebid by responder is natural. Two of responder's own suit or a simple raise of opener's second suit is a weak signoff, and a jump to 3♣ shows an invitation with six or more clubs.

XYZ is on in every uncontested auction in which the first three calls are at the one level, including a 1NT rebid:

• 1♣ - 1♦ - 1♥, 1♣ - 1♦ - 1♠ and 1♣ - 1♦ - 1NT
• 1♣ - 1♥ - 1♠ and 1♣ - 1♥ - 1NT
• 1♣ - 1♠ - 1NT and 1♦ - 1♠ - 1NT
• 1♦ - 1♥ - 1♠ and 1♦ - 1♥ - 1NT
• 1♥ - 1♠ - 1NT

It is off in competition. After an overcall or a double, responder's bids return to their natural meanings and cue bids or doubles take over. It is also off when opener's rebid is at the two level, since XYZ needs all three bids at the one level. By a passed hand, the usual agreement is that 2♦ shows a maximum invitation instead of a game force.

One auction needs a word of care. After 1♣ - 1♦ - 1♥, a bid of 1♠ by responder is natural and forcing for one round. XYZ leaves it alone, and only 2♣ and 2♦ become artificial.

After the 2♣ puppet

Opener bids 2♦ whatever the hand. Responder's next bid shows the invitation, and opener then accepts or declines. After 1♣ - 1♥ - 1NT - 2♣ - 2♦ - 2♥, showing an invitation with five hearts, opener passes with a minimum and two or three hearts, bids 3♥ with a maximum and three hearts, and bids 4♥ with a maximum, three hearts and a ruffing value. After an invitational 2NT, opener passes with a minimum and bids 3NT with a maximum.

After the 2♦ game force

Opener describes naturally, with the same priorities as in new minor forcing: three-card support for responder's major first, then extra shape, then notrump.

The same 2♣ puppet handles a weak hand. Holding 7 points and five diamonds after 1♦ - 1♥ - 1♠, responder bids 2♣, waits for 2♦ and passes. The contract is a part score in a known fit instead of a misfit at 1♠ or 1NT.

• The natural 2♣ rebid disappears. A weak hand with clubs goes through the puppet and signs off in 3♣. An invitational hand with clubs jumps to 3♣ directly and needs six of them.
• Opener must never pass 2♣. Even with a club fit, opener bids 2♦. Responder may hold a hand that wanted to play in diamonds.
• The game force starts a level lower. Because 2♦ creates the force, opener and responder have the whole three level to look for the best game or a slam.
• Invitations stop at the two level. Opener can pass an invitational 2♥ or 2♠ with a minimum, which saves a level on every misfit.

XYZ compared with other checkback methods

New minor forcing applies only after a 1NT rebid, and its single ask covers both invitational and game going hands. Two-way checkback uses the same 2♣ and 2♦ pair as XYZ but also only after 1NT. XYZ applies that structure to every start with three one-level bids, so one agreement replaces several, including most of the work that fourth suit forcing does at the two level. Pairs who play two over one often add XYZ, since it sits comfortably beside a game forcing style.

What is the XYZ convention in bridge?

XYZ is a set of agreements for responder's second bid after three one-level bids, such as 1♦ - 1♥ - 1♠. Responder's 2♣ is a puppet to 2♦ for a signoff or an invitation, and 2♦ is artificial and forcing to game.

What does XYZ stand for in bridge?

The three one-level bids that start the auction: X is the opening, Y is responder's one-level response and Z is opener's one-level rebid. The convention applies to responder's next bid.

Is 2♦ in XYZ forcing to game?

Yes, by an unpassed hand. It is artificial and says nothing about diamonds. By a passed hand it shows a maximum invitation instead.

Does XYZ apply after an overcall?

No. XYZ is for uncontested auctions only. After an overcall or a double, responder's bids are natural and cue bids or doubles take over.

How do I sign off in clubs when playing XYZ?

Bid 2♣, let opener bid 2♦, then bid 3♣. A direct jump to 3♣ shows an invitation with six or more clubs.

Is XYZ better than new minor forcing?

It covers more auctions and lets invitations stop at the two level. The cost is the natural 2♣ rebid and one more agreement to remember.