Two-way checkback is a convention. This convention is alertable.

Two-way checkback is a convention to find a major suit fit. It is similar to 2 Stayman after 1NT opening, but two-way checkback is applied by the responder after a 1NT or 2NT rebid by the opener.

It is alternately called two-way checkback Stayman or two-way new minor forcing because it is similar to both, but with both 2 and 2 as the asking bids.

Convention Edit

The following sequence activates this convention:

Opener Responder
1/1 1/11
1NT2 2/23
  1. showing 4 of the suit
  2. denying 4 of the suit
  3. Two-way checkback, shows 5 cards in the bid major OR 4 cards in the other major. If the asking bid is 2, it is only invitational; if the asking bid is 2, it is game-forcing.

After the 2-level asking bid, opener's rebids are:

  • 2: length in s.
  • 2/2: 4 cards if it is unbid OR 3 cards if it is bid (jump to 3 if maximum after 2)
  • 2NT: no support (jump to 3NT if maximum after 2)

Implication Edit

If two-way checkback is on after a 1NT rebid by opener, the following sequence is weak:

Opener Responder
1 1
1NT 2

This shows at least 5 s and 4 s with about 6 to 9 points. With more points, 2 would be bid in place of 2.

Variants Edit

Two-way puppet checkback Edit

Most now play 2 as a puppet to 2, enabling the use of this convention to sign off at 2.

XYZ Edit

Some extend this convention to all responder rebids of 2 and 2 after 3 1-level bids in an uncontested auction (i.e. 1X-1Y-1Z-2m).

See also Edit