Note:
In competition only DBL maybe
a
check-back!!!
Non-forcing
Check-back
This
occurs after 1m-1M-1NT-2C
- 2H: Singleton spade and 4 hearts
- 2D: Otherwise
- Pass: Weak canapé with diamonds
- 2M': 5-4, round forcing
- 2M: Invitation, 5+ suit
- 2NT: Weak canapé with clubs
- 3C: Invitation canapé with clubs
- 3D: Invitation canapé with diamonds
- 3M': 5+5+, round forcing
- 3M: Invitation, 6+ suit
- 3NT: Proposition with 5 cards in H/S
Forcing
Check-back
This
occurs after 1m-1M-1NT-2D and is the
only way to make a game forcing bid.
- 2M: 3-card fit
- Rebid of opening suit: 5+ good suit
- New suit: Natural (usually 5-4)
- 2NT: Otherwise
Wolf Sign-off
This
is a "negative ping-pong" occurring after:
- 1C-1D-2NT-3C
- 1m-1M-2NT-3C
- 1H-1NT (showing 5+ spades)-2NT-3C
Opener has to bid 3D after
which responder bids:
- Pass
- Repeat own suit: Sign-off
- 1m-1S-2NT-3C-3D-3H: 5-5, sign-off
- 1m-1H-2NT-3C-3D-3S: Looking for 4 spades, game only (usually 4-4
in majors)
- Jump in a new suit: freak hand, game only
- 3NT: Mild slam try in clubs
By inference any responder bid other than 3C
is strong.