Source: Superaccepting over 1NT

I recommend that opener almost always superaccept with the cheapest available step, 1NT-P-2Diamond Suit-P-2Spade Suit or 1NT-P-2Heart Suit-P-2NT; I feel it’s more important to leave responder room to show his second suit for game or slam exploration, than for opener to waste the whole 3-level to shut out an overcall.

I wouldn’t mind playing the cheapest step as my only superaccept. Most of my partners want me to do more than that, so I reluctantly agree to show a side worthless doubleton as opener if I have one.

There’s one further refinement I think is important. Notice that over 1NT-P-2Diamond Suit, when opener bids 2Spade Suit, 2NT, or 3club suit, there is room for responder to “retransfer” (force opener to be declarer) with a 3Diamond Suit rebid. Over 1NT-P-2Diamond Suit-P-3Diamond Suit and 1NT-P-2Heart Suit-P-3Heart Suit there isn’t. I play the “3M-1” superaccept as a superaccepting hand with no tenaces, like:

Spade SuitJxxx Heart SuitAxxx Diamond SuitAKx club suitAx.

If reponder holds any stray K-J or Q-T combinations, the lead should come up to his hand.

Therefore, my complete superaccept system over 1NT-P-2Diamond Suit:

  • 2Heart Suit Any hand without 4-card support, and any 4-3-3-3 hand.
  • 2Spade Suit Any hand with 4-card support, not qualified for one of the higher superaccepts.
  • 2NT 4-card support, x-x in spades.
  • 3club suit 4-card support, x-x in clubs.
  • 3Diamond Suit 4-card support, no tenaces, forcing responder to be declarer.
  • 3Heart Suit 4-card support, x-x in diamonds.

Similarly over 1NT-P-2Heart Suit:

  • 2Spade Suit Any hand without 4-card support, and any 4-3-3-3 hand.
  • 2NT Any hand with 4-card support, not qualified for one of the higher superaccepts.
  • 3club suit 4-card support, x-x in clubs.
  • 3Diamond Suit 4-card support, x-x in diamonds.
  • 3Heart Suit 4-card support, no tenaces, forcing responder to be declarer.
  • 3Spade Suit 4-card support, x-x in hearts.

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