Grand Slam Force


When a small slam looks like a slam-dunk but a possible weakness in trumps is inhibiting a grand slam, the GSF can be used to explore for a Grand Slam by bidding 5N when that bid cannot be mistaken for a natural bid nor for part of Ace/King asking.

Asker's partner should bid the grand slam if he holds 2 of the top 3 trump honors; otherwise, he should bid the small slam.

If the 5N is a jump bid, the last suit bid is presumed to be the trump suit unless some other suit was clearly indicated as trump prior to that bid or if that bid was a conventional raise, such as a splinter bid.


Other Responses to 4N GSF:

    While the simplest responses are to bid Grand Slam or Small Slam, many other response systems are available such as this one:

    If Spades are trumps:

      5 = 3 or 4 small trumps only
      5 = 3+ trumps including the Queen.
      5 = 3 trumps including the Ace OR King.
      5 = 4+ trumps including the Ace OR King.

    If Hearts are trumps:

      5 = 3 or 4 trumps, no A,K, may have the Q.
      5 = 3 trumps including the Ace OR King.
      5 = 4+ trumps including the Ace OR King.

    If Diamonds are trumps:

      5 = 3 or 4 trumps, no A,K, may have the Q.
      5 = 3+ trumps including the Ace OR King.