The Roman Keycard convention is a powerful tool. The keycards are
the four aces plus the king in the agreed trump suit. The
convention also lets you find out about the trump queen. Here it
is in action.
Scoring: Matchpoints
Hand #35
Dlr
E
Vul
N-S
832
AK9875
AK10
A
J1064
Q53
Q87654
K654
2
9762
K1032
AQJ1097
Q3
J84
J9
West
North
East
South
Pass
2
Pass
4NT
Pass
5*
Pass
5
Pass
6
All Pass
*1 or 4 keycards
BIDDING: My partner in the South seat opened a weak two bid
and my thoughts went immediately to slam. However, we sometimes
open a weak two with a five card suit, so I was concerned about trump
quality. The answer could be found with Keycard Blackwood.
South's 5 response showed one or four
keycards so I knew we were missing one important card. My 5
bid asked about the spade queen. His leap to 6 told me he
held the lady but no outside king. Without the queen, he would
have bid 5.
PLAY: West lead a club and my partner quickly wrapped up thirteen
tricks. He led the spade eight from dummy and continued with a
small one to his hand. He then went back to dummy with a diamond
to repeat the finesse. He discarded his losers on dummy's heart
suit after ruffing the fourth round.
To realize the value of the convention, what would you have bid if
South had denied the spade queen? What if his suit was:
AJ9754 or K109854? Do you still want to be in slam?