Lesson 15 of 17
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406 – Overcalling 1NT

406

1NT Overcall

When the opponents open one of a suit and you overcall 1NT, you show a balanced hand with the strength of a strong 1NT. The normal range for a 1NT opening is 12-14 Acol or 15-17 Standard American. The overcall can be stronger up to 18 points
Bridge Lesson 412 – <span class="glossary-tooltip glossary-term-26900" tabindex="0"><span class="glossary-link"><a href="https://members.60secondbridge.com/glossary/1nt/" class="glossary-only-link">1NT</a></span><span class="hidden glossary-tooltip-content clearfix"><span class="glossary-tooltip-text">This bid in the opening position usually indicates that the bidder has a balanced distribution of suits however with some unbalanced hands you will respond 1NT just to keep the bidding low The distribution of suits in the hand can be in either of the three fol...</span></span></span> Overcall

The Direct 1NT Overcall

A direct overcall of 1NT is similar to an opening bid of 1NT: One small difference is that the upper limit is a little higher, 18 points. That’s because it’s more dangerous to overcall 1NT than to open 1NT. Our left-hand opponent is in a better position to make a penalty double if the auction belongs to their side. The opening bid has both shown the opposition has points and given an indication of the best opening lead. So we’d like a little extra points to bid. The other difference from the 1NT opening bid is that we need one or more stoppers—high cards and length—in their suit(s).
This is because our left-hand opponent now has a good idea what to lead, especially if the opening bid is in a major, promising five or more cards

    Direct Position 1NT Overcall

  • A balanced hand
  • 15- 18 HCP
  • Stoppers in opposition suit

1NT in the Balancing Position

When the opponent on the left opens the bidding and the next two players have passed, we are in the balancing position. If we pass, the auction is over. In this position, it’s usual to compete with 3 points—less than you would in the direct position.
A 1NT ibid n the balancing position shows 12 -15 points. When in the balancing position you can overcall 1NT with less points than if you were in the direct position.
With a hand unsuitable for a suit overcall or a takeout double you should make a balancing 1NT bid, hoping that partner will have some points since the left hand opponent did not open strong and the right hand opponent didn’t have enough points to reply.
With a stronger hand in the balancing position start bidding with a takeout double and then go to No Trumps

    1NT Overcall in the Balancing Position

  • A balanced hand
  • 12 – 15 HCP
  • Stoppers in opposition suit


West opens the bidding 1C and East Responds 1D – What should you Bid?

  • K 4
  • K 9 8
  • A K 6 5 2
  • Q J 6

Overcall 1NT – you have stoppers in diamonds and clubs and 16 HCP

Responses

The Acol Bidding System

*If you live in the UK, Ireland, Australia or New Zealand Acol is the most widespread system Acol has the following characteristics:
  • It is a natural system: most opening bids, responses and rebids are made with at least 4 cards in the suit bid, and most no trump bids are made with balanced hands.
  • It is a four-card major system: only four-card suits are required to open 1 or 1, unlike Standard American and many other systems where five-card suits are typically required.
  • It makes extensive use of limit bids: limit bids describe the hand so closely, in terms of high card points (HCP) and shape, that the one who makes the limit bid is expected to pass on the next round, unless partner makes a forcing bid.
  • Understanding and correct use of limit bids and forcing bids is fundamental to applying the system: all no trump bids below the level of 4NT are limit bids, as are all suit bids that merely repeat a suit already bid by the partnership; changes of suit may be forcing or not depending on the approach bids.
  • The level of the 1NT opening bid influences other bids: the normal choice is between a “weak no trump” (12–14 HCP) and a “strong no trump” (15–17 HCP).
  • All 1 of a suit opening bids then promise at least 4 cards in the bid suit
  • Notrump follow-up conventions include Stayman, Jacoby transfers Blackwood and Gerber Convention.