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Wbridge5 Conventions
Available systems
Hand evaluations
Opening Bids
Up to 2NT
Pre-emptive
Responses to openings of: 
1 of a suit
1 NT
2 ♣
2 , 2, 2 ♠
2 NT
Responses to Stayman
Opener's rebids
Competitive bidding
Intervening bids
Doubles
The Sputnik double
Michael's cue-bid
Options
Optional conventions
The weak two
Suit agreement
Games and slams
Departures from the SEF

Suit agreement


Splinter bids

A jump response at the 4-level shows a vois in the suit bid and 4-card support for opener's suit. In the same way, a double jump in a new suit by opener shows a void in this suit plus 4-card support for responder's suit


Truscott 2NT

The Truscott 2NT is a bid of 2NT after your partner opens the bidding with one of a suit (major or minor) and the next player makes a takeout double. It shows a good raise to the three-level or better, say 10+ points and 4-card support (5-card support if partner's suit is a minor). Using this convention means that any immediate raise to the three level or higher over an opponent's takeout double is pre-emptive. Opener will know not to expect much from you in the way of high cards


Fit-showing 2NT and 3NT bids

This option must be checked in order to employ the 2NT Special or the 2NT Jacoby options. However, if neither of these is selected then these bids have the following meanings

  • 2NT: 11-12 points and 3- or 4-card support for the major suit opened and a balanced hand
  • 3NT: 13-15 points and 4- or 5-card support for the major suit opened and a balanced hand

2NT special

With this convention, a 2NT response shows 12-15 points, 3- or 4-card support for opener's suit and a balanced hand. After a 3 ♣ relay bid by opener, responder re-bids as follows:

  • 3 : 3-card support for opener, minimum strength
  • 3 : 4-card support for opener, minimum strength
  • 3 ♠: 4-card support for opener, maximum strength
  • 3NT: 3-card support for opener, maximum strength

A response of 3NT shows 16-19 points, at least 3-card support and no other biddable suit


Jacoby 2NT

To use this convention, your partnership agrees that after you open 1 or 1 ♠ and your partner is an unpassed hand, his jump to 2NT shows:

  • Forcing-to-game strength (12 plus points)
  • Good trump support (3 or more cards)
The 2NT response forces you to at least game level. It is not a suggestion to play in notrump; it shows a balanced hand with support and asks the 1 or 1 ♠ opener to further describe his hand:
  • With a minimum opening (less than 16 points) opener bids the game
  • With more strength, he bids a singleton or rebids his suit at the 3-level, or bids 3NT if balanced
Note that the Jacoby 2NT convention is "on" only if responder has not previously passed in the auction. If you are a passed hand, your jump to 2NT is natural, showing a balanced hand of 11-12 points

A response of 3NT shows 16-19 points, at least 3-card support and no other biddable suit


1 major - 4 major weak

An immediate jump to game after an opening of 1 or 1 ♠ is weak and is made with a minimum of 4 cards and 10 points in support. High-card points should not exceed 10


Bergen

These are conventional responses to opener's 1 of a major:

  • 3 ♣: 4-card support and 9-10 support points
  • 3 : 4-card support and 11-12 support points

The convention does not apply after an opening pass by responder. In this case the jump to 3 ♣ or 3 shows a strong supporting hand with 5 Clubs or 5 Diamonds