Roman Key Card Blackwood 1430

Roman Key Card Blackwood 1430

N
W   E
 
S
A Q 4 3
A K Q J
A 8 7 3
6

Dealer:

West

W N E S
1NT Pass 2 Pass
2 Pass 4NT Pass
5 Pass 6 End

In RKCB, the aces and the king of trumps are all regarded as 'key cards'. Responder reports the number of these key-cards with standard response bids.

5 1 or 4

5 0 or 3

5 2 (or 5), without the queen of trumps

5 2 (or 5), with the queen of trumps

This is called Roman Key Card Blackwood 1430.