Roman Key Card Blackwood - 1430 version
RKCB is similar to Blackwood, but instead of four Aces there are Five Keycards. They are
the Aces plus the King of the agreed trump suit. Starting with 4NT, a reply of 5♣ shows 1 or 4 Keycards,
5♦ shows 0 or 3, 5♥ shows 2
Keycards but no trump Queen, and 5♠ shows 2 Keycards with the trump Queen.
If your side has all five Keycards, bidding 5NT will repeat the process for Kings, remembering that there
are only three Kings since the trump King is counted as a Keycard. There are two popular methods for
responding to 5NT. The first is the same as normal Blackwood - 6♣ shows no Kings,
6♦ shows one, and 6♥ shows three. This is
the method used in the recommended bidding here.
If the response to 4NT is 5♣ or 5♦ the 4NT bidder may choose to ask
about the trump Queen rather than ask for Kings. She does this by bidding the cheapest non-trump suit.
Partner denies the trump Queen by returning to the trump suit. A 5NT bid confirms the trump Queen, but
shows no outside Kings. Bidding any non-trump suit confirms the trump Queen and also the King of the suit
Void showing by Responder is handled just as in regular Blackwood except it refers to one or two Keycards, rather
than one or two Aces.
Click any Deal to start.