Roman Key Card Blackwood 1430

With no agreed suit, standard Blackwood is used.


4NT Responses can show the number of key cards (Aces + trump King), trump Queen, void.

    5 = 1 or 4 keys counting the trump King
    5 = 0 or 3 keys counting the trump King

      If responder bids 5 or 5, he is not able to show the trump Queen.
      Asker may bid the next higher non-trump suit to ask about the Queen:

        After 4N-P-5-P. Asker bids 5 if Diamonds are not trumps; otherwise, he bids 5.
        After 4N-P-5-P. Asker bids 5 if Hearts are not trumps; otherwise, he bids 5.
        Responses:
          Bid the trump suit without the trump Queen.
          Bid 5N with the trump Queen and no side-suit Kings.
          Bid a non-trump suit with the trump Queen AND the King of the suit bid.

    5 = 2 or 5 keys WITHOUT the trump Queen
    5 = 2 or 5 keys AND the trump Queen
    5N = 0, 2, or 4 keys with an unnamed void
    6// = 1 or 3 keys and a void in the suit bid excluding the trump suit.
      For example, if Diamonds are trumps and bidding has gone 4N-P and you have a void in Hearts,
      bidding 6 lets your partner know that you have a void in Hearts or Spades without going past 6.
      (If the void were in Clubs, you would have bid 6.)
      If Hearts are trumps, you can bid 6 or 6 to show 1 or 3 keys and a void in the suit bid.
      Since you will not bid 6 if Hearts are trumps, a bid of 6 indicates 1 or 3 keys and a
      void in Spades, the only suit left, without your having to bid past 6.

5N Asks for number of Kings, excluding the trump King, and implies having all keys.

    Responses:
      6 = no Kings
      6 = 1 King
      6 = 2 Kings
      6S = 3 Kings


RKCB In Competition

    Modified ROPI:

      After 4N-(Dbl)
        Redbl = 0, 3, or 5 key cards.
        Pass = 1 or 4 key cards
        5 = 2 key cards WITH the Queen of trump.
        5 = 2 key cards WITHOUT the Queen of trump.

    Modified DOPI:

      After 4N-(any) or *optionally just after 4N-5
        Double = 0, 3, or 5 keys
        Pass = 1 or 4 keys
        Cheapest = 2 keys WITHOUT the Queen
        Second-cheapest = 2 keys WITH the Queen.

      *Optionally after 4N-(5), when bidding up the line may get you too high.
        Example: 1-(2)-4N-(5)-

        Double = 2 or 4 keys
        Pass = 1 or 3 keys


Options

    RKCB - Kickback
      Asker bids 1 above the agreed suit to save space.
      Responder continues RCKB 1430 up the line.
        Examples:
          1-4-...
            4 = asking
              4 = 1 or 4 keys
              4 = 0 or 3 keys
              4N = 2 or 5 without Queen
              5 = 2 or 5 with trump Queen
              5 = 0, 2, or 4 keys with an unnamed void
              5/5/6 = 1 or 3 keys and a void in the suit bid
                    excluding the trump suit.
          1-1-3-...
            3 = asking
              3N = 1 or 4 keys
              4 = 0 or 3 keys,
               etc.

    Last Train Cuebid

      After agreeing on a major suit, a 4-level suit bid below the trump suit means that
      Asker has extras and slam interest if responder also has extras.
        Examples:
          1-3 = limit raise shows 10-12 points.
          4 = Opener has 20-21 points and asks if responder has a good 11 or 12.
        1-4-4
          Responder's Splinter shows 4+ Spades, singleton or void Hearts, and 13+ points.
          Opener has ~17 points and asks if responder has ~15.