GENERAL BIDDING PRINCIPLES

  • A competitive bid in the pass-out seat is a king weaker than if bid directly.
  • More flexible about aggressive third-seat opening bids.
  • Assume strong overcalls of weak bids and weak overcalls of strong bids
  • SPECIFIC SYSTEM POINTS

  • Responses to a natural 1NT/2NT overcall have the same meaning as after a no-trump opening bid of the same level.
  • 5332 is treated as balanced, even with 5CM. Thus 1H 1S 2H shows a six-card suit.
  • A one-of-a-suit opener's 2NT rebid is game-forcing opposite a weak response, but natural opposite a stronger one.
  • New suit response (below game) to partner's overcall/weak two/pre-empt is forcing (if the intermediate hand passed)
  • Super-accepts are only permitted in response to transfers bids up to the three-level.
  • "RULE OF THUMB" GUIDELINES TO USE IF IN DOUBT

    Splinter LevelBlackwood LevelGrand-Hunting Level
    Unnecessary jump shiftsplinterExclusion BlackwoodComplete two-suiter
    To transfer and then bid a second suitassumed to be either natural or a splinter (in the absence of more specific agreements for a particular sequence), depending on whether or not it's an unnecessary jump. However you can't splinter for your own suit except as responder in certain sequences after partner opened a strong balanced hand, so 1H 1NT 4D (for example) is natural because responder hasn't shown a suit.Exclusion Blackwood, except that the cheapest non-trump bid if Minorwood has been bypassed will normally be taken as Minorwood.Complete two-suiter

    TERMINOLOGY

    Splinter Levelbelow four of an agreed trump suit
    Blackwood Levelbetween four and five of an agreed trump suit
    Grand-Hunting Levelbetween five and six of an agreed trump suit
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    Copyright 2015 Finn Clark.