ACOL 4NT (Four No-Trump)


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An ACOL 4NT opening bid shows an extremely strong hand, usually a one-suiter, that only needs to hear about which aces (if any) partner holds in able to bid a slam. The responses to the ACOL 4NT are as follows.

Responder's Bid Meaning
5 0 aces
5 The ace of diamonds, and no other aces
5 The ace of heart, and no other aces
5 The ace of spades, and no other aces
5NT Any two aces
6 The ace of clubs, and no other aces


Opener's rebids are natural. His hand must be good enough, of course, to play at the five-level opposite an aceless, trickless hand.

See also

  • ACOL 2C
    A strong, conventional opening bid showing a balanced 23 HCP or an unbalanced, game-forcing hand.

  • ACOL Two Bid
    A strong ACOL 2, 2, or 2 opening bid.

  • Strong 2C Opening Bid
    The Standard American method of using 2C as a strong, artificial opening bid.

  • Strong Two Bid
    The Standard American method of using 2, 2, or 2 opening bids to show strong hands.

About

Bridgebum began in 1999 and covers a large set of descriptions of bidding conventions, declarer play and defense, and more.

Latest Update

Meckwell Defense to 1NT
A defensive bidding structure for use against both weak and strong 1NT opening bids.

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