round of bidding or later asks for a stopper. (remembering of course, that an immediate cue of opponent's suit is just showing a strong hand).
Responder's first duty is to bid NT with a stopper. Without a stopper, some other descriptive call must be made.
Partial or Full Stopper?
Three agreements are possible:
(1) Cuebid promises a partial stopper
and asks for partial stopper or better; or
(2) Cuebid denies partial stopper
and asks for full stopper; or
(3) Cuebidder may or may not have partial stopper
and asks for partial stopper or better
Option (3) is used in the Examples:
Examples
♠ KQx
♥ AQxxx
♦ xx
♣ Axx
you are Opener:
1♥ -- (2♦) –- 3♣ -- (pass)
?
cuebid 3♦, asking partner for diamond stopper.
♠ Qxx
♥ Kx
♦ AQxxx
♣ KJx
you are Responder:
1♥ -- (1♠ ) -- 2♦-- (pass)
3♦ - (pass) ---?
cuebid 3♠ , asking partner for spade stopper.