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401 – Defensive Bids Overcalls and Doubles

401

Overcalling – Bidding on Defense

Many beginning bridge players can get confused about the rules of Bridge changing depending on whether you are the ‘opener-responder’ or ‘the defense’. This lesson explains the bidding rules for the defense
How To Play Bridge – Lesson 401 – Overcalling

Overcalling

So far we have only learnt how to open the bidding and how to respond to partner’s opening bid. It’s much more fun, though, if everyone is bidding. If you bid after your opponents have opened the bidding, you are an overcaller.

The rules are now different. Instead of trying to get to game, you are attempting to:

  • Steal the contract
  • Obstruct the opponents
  • Suggest a lead to partner

Guidelines for Overcalling at the Level of 1

Suit Length Overcall at the One Level
5 cards Have at least two honors in the suit or a strong hand
6 cards Suit can be very weak

                    

If you have a good 5-card suit (good = 2 honor cards) you can simply bid that suit even with less than 12 TP. All you promise is a good suit, so partner shouldn’t expect a lot of points. A good rule of thumb for a good suit is that you should have 2 honors.





Instant Progress Quiz – Check all correct answers




 



  “X” A negative double

  “X” A takeout double

  1H

  Pass – as your heart suit isn’t good enough







Your right-hand opponent bids 1

What’s your overcall?

  • K Q J 10 9
  • A 6 2
  • 8 7 4
  • 9 3
Overcall 1. You have a good suit and points aren’t as important when you are overcalling. Even if you changed in your hand the A to the 9 you could still overcall 1.



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.