Two-Way Checkback

What is Two-Way Checkback?

Two-Way Checkback is used after opener rebids 1NT. Instead of using only one artificial checkback bid, responder gets two conventional routes: one for invitational hands and one for game-forcing hands.

The common memory hook is simple: 2 starts the invitational route, usually asking opener to relay to 2, while 2 creates a game force and asks opener to describe major-suit support and shape.

With a roughly 12-14 HCP 1NT rebid, a common split is 2 for about 10 to a bad 12, or a weak hand with long diamonds that intends to pass the relay, and 2 for a good 12 or more. Shift those thresholds when opener's rebid range differs, as it does in many weak-notrump methods.

Why split the hands?

The split makes later auctions clearer. Invitational hands can stop safely at the two or three level, while game-forcing hands do not need to waste space proving strength.

This is especially useful when responder has five cards in their major, four cards in the other major, or a long minor with game interest.

• 2 followed by a major rebid often invites.
• In treatments that route the relevant balanced invites through 2, 2 followed by 2NT is natural and invitational.
• 2 followed by pass can be a weak diamond signoff if agreed.
• 2 starts game-forcing exploration.
• The natural 2 signoff is sacrificed. A weak diamond signoff remains available only by routing the hand through 2 and passing opener's 2 relay.

Direct rebids depend on the auction

After a one-minor opening, a direct rebid of responder's own major at the two level is weak and to play. The other-major bid is different: after a 1 response, direct 2 commonly shows a weak hand with at least five spades and four hearts, asking opener to pass or correct. After a 1 response, direct 2 is a responder's reverse whose strength is a partnership agreement; published methods play it as invitational or game-forcing.

Direct 2NT also needs an explicit agreement. A common simple treatment is natural and invitational. An advanced XYNT treatment instead uses it as a relay to 3 for a club signoff and other structured hands, routing the relevant balanced invitations through 2. Responder’s continuations after the forced 3 are open space, and partnerships can attach their own treatments there, such as shortness-showing or two-suited hand types. Do not combine follow-ups from the two structures.

• Direct two of responder's own major: weak, to play.
• After a 1 response, direct 2: commonly weak with 5+ spades and 4+ hearts, pass or correct.
• After a 1 response, direct 2: a reverse; define whether it is invitational or game-forcing.
• Natural direct 2NT: a balanced invitation; delayed 2NT can then distinguish a five-card major by agreement.
• Relay direct 2NT: an artificial puppet to 3; the relevant balanced invitations go through 2 instead.
• Direct three-level bids: treatment-dependent; published methods use them for weak minor signoffs, natural game forces, or distributional slam tries.

Responder follow-ups after 2

After the 2 relay and opener's 2, responder clarifies the hand. A new major shows four cards and invitational strength; rebidding responder's major shows a five-card or longer suit and invites; a jump to three of responder's major shows a good six-card suit with invitational values; passing 2 may be a weak diamond escape if the partnership allows it.

Delayed 2NT depends on the direct-2NT agreement. In one common structure it shows a balanced invitation with a five-card major, while direct 2NT handles a balanced invitation with only a four-card major. In an all-invites-through-2 structure, delayed 2NT covers a wider set of balanced invitations.

The danger is memory load. Both players must know which sequences are invitational, which are forcing, and which are signoffs.

Opener's rebids after game-forcing 2

After the game-forcing 2 inquiry, opener describes the hand: three-card support for responder's major, an unbid four-card major, a good five- or six-card opening minor, or otherwise a 2NT rebid. Since game is forced, the pair can use slower bids to find the best strain.

When opener holds both major-suit features, the priority order is a partnership agreement. Support-first methods show three-card support before the other major. Other-major-first methods, sometimes described as hearts first or up the line in the common 1m - 1 auction, show four hearts before delayed spade support.

This is where the convention earns its keep: responder can separate invitational noise from serious game and slam tries.

• Support first: show three-card support for responder's major before a new major.
• Other major first: show an unbid four-card major before delayed support.
• With no higher-priority major feature, show a good five- or six-card opening minor at the three level.
• Bid 2NT only with none of the agreed descriptive features.

Examples

Two-Way Checkback is strongest when responder can choose the right route immediately.

Common mistakes

FAQ

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