Complicated conventions can cause trouble at the table, but if properly
employed, they can help you find your best contract. Take a look
at Roman Keycard Blackwood in action.
Scoring: Matchpoints (Pairs)
Hand #31
Dlr
E
Vul
N/S
AKJ97
7
AJ92
AJ5
54
KJ102
865
10987
103
9653
1074
Q643
Q862
AQ84
KQ3
K2
West
North
East
South
Pass
1NT
Pass
2*
Pass
3
Pass
4NT
Pass
5
Pass
5
Pass
6
Pass
6
Pass
7
Pass
7
All Pass
*Jacoby Transfer
BIDDING: As soon as
South opened 1NT, North was thinking about a grand slam. South's
jump to 3 really got North excited because
this showed a maximum no-trump with four spades. This partnership
used Roman Keycard Blackwood and South's 5
response showed one keycard (keycards= 4 aces + trump king). 5
asked if South held the trump queen and the 6 response
said "yes, and I also have the king of clubs". Next the 6
asked about the diamond king and the 7 response showed the king of
diamonds along with the queen. North could now count twelve
tricks with several ways to find another so he bid the grand slam.
PLAY: West led the ten of
clubs and it only remained for declarer to draw trumps and ruff dummy's
third club in his hand for the thirteenth trick. Note there are
only twelve tricks in a no-trump contract.
It's true many players in the North seat might just leap to the grand
slam after discovering South had four spades and a maximum hand, but if
South held Kxx(x) of diamonds with his values in the other suits, the
slam might fail. Roman Keycard is a powerful convention but I
urge you to study it carefully before adding it to your convention card.