BriJ

  BJ Bridge for Android

BriJ Conventions

Your Convention Card:
Acol with Benji 2 openers

Opening bids

Balanced

Unbalanced (or balanced with too many hcp for 1NT)

  • 1 of a suit: 12–19 high card points and losing trick count (ltc) of at most 7.
  • BriJ may open with 2 fewer high card points depending on vulnerability, playing position and the aggression level you have specified (currently Medium)

Opening suit bids at the 2 level

    Strong Benji minors with weak majors is a selected option

  • 2♣ with 21,22 or 25,26 high card points balanced, or 8 playing tricks in an unspecified suit (partner gives a relay response 2♦)
  • 2♦ with 23,24 or 27,28 high card points balanced, or 10 playing tricks in an unspecified suit (partner gives a relay response 2♥)
  • 2♥ is Benji weak 2 (high card points 5-10)
  • 2♠ is Benji weak 2 (high card points 5-10)

Opening suit bids at the 3 and 4 level

  • A 3-level opening bid in any suit is weak (5–10 high card points ) with a 7 card suit
  • A 4-level opening bid in any suit is weak (5–10 high card points ) with an 8 card suit

5-Card Majors not chosen

Response Bids

Stayman

    After 1NT with potential high card points for game and a 4-card major, bid 2♣ asking for majors

  • With a major, the opener then bids 2♥ or 2♠ to show their lowest-ranked major or
  • 2♦ to deny a major

Puppet Stayman after 2NT is a selected option

    3♣ asks for 4 or 5 card majors with partnership strength for game
    Responses:

  • 3♦ shows no 5 card major but at least one 4 card major
  • 3♥ or 3♠ shows a 5 card major
  • 3NT denies a 4 card major
  • After 3♦ response, 4♦ means both majors held
  • Otherwise responder bids 3♥ to show 4 spades, 3♠ to show 4 hearts and 3NT to show neither 4-card major held

'Normal' Stayman after 2NT not chosen

Baron after 2NT opener asking for 4-card suit not chosen

Transfers

After 1NT, transfer to a major is a selected option:
    With 5 cards in a major,

  • 2♦ asks opener to transfer to 2♥
  • 2♥ asks opener to bid 2♠
  • After 1NT doubled, transfer to any suit, including:  redouble→ 2♣ and 2♣→ 2♦
After 1NT, transfer to a minor is a selected option
  • with 6 cards in a minor, 2♠ asks opener to bid 3♣ and responder may correct to 3♦
After 2NT, direct opening or strong Benji rebid is a selected option
  • 3♦ requests a transfer to 3♥
  • 3♥requests a transfer to 3♠. 3♠ signifies a holding of 4 hearts and 5 spades

'Truscott 2NT over 1 suit doubled' is not selected

'Jacoby 2NT' support for partner's 1-suit opener is not selected

'Ogust' to partner's weak 2 opener is not selected

Splinter bid support for partner's 1-suit opener is not selected

'Inverted Minors' is not selected

Roman Key-card Blackwood (RKCB) is selected (alternative to standard Blackwood)

    4NT asks for key-card count (aces and the King of trumps) (used after a suit fit is found, with fewer than a combined 13 losing trick count)

  • respond 5♣ = 1 or 4; 5♦ = 3 or 0; 5♥ = 2 (without the Queen of trumps); 5♠ = 2 (with the Queen of trumps).
  • After 5♦ or 5♥ initial response, bid 1 rank up to ask for Q trumps – “bid slam if you have it” (not currently implemented in BriJ)

Blackwood not chosen

Gerber is not chosen

Quantitative 4NT is selected

  • 4NT asks partner to bid 6NT when holding a maximum NT opening hand (ensuring 33+ high card high card points for the partnership and therefore at most one ace in opposition hands); otherwise, pass with fewer hcp

Overcalls

Normal suit overcall

  • Over 1 suit opener shows 5 good cards and 8 – 15 high card points (10 hcp or very good suit at the 2 level)
  • Jump overcall if weak (5-10 high card points ) with a 6+ card suit, but beware of 3 clubs if ELH is on your Convention Card!
Unassuming Cue Bids not used

Normal suit overcall over 1NT

  • 2♥ and 2♠ similar to suit overcall at the 2 level, i.e. 10+ hcp and a 6 or good 5- card suit
  • Overcall with minors signifies ASPTRO

ELH (modified Ghestem) overcall is selected

    Over 1 suit opener, ELH shows at least two 5 card suits
  • Use with opening points and a losing trick count at most 7. Bid:-
  • Opponents suit = Extreme (highest and lowest ranked) suits held
  • 2NT = Lowest ranked of other suits held
  • 3♣ = Highest ranked of other suits held

ASPTRO is a selected option

    Overcall over 1NT, showing 2-suited hand in at least 9 cards
  • Use with opening points and at most a 7 losing trick count
  • 2♣ shows ♥and another unspecified suit
  • 2♦ shows ♠ and another unspecified suit
  • 2NT shows two 5-card minors

Doubles and redoubles

  • Over 1NT with 15+ high card points double is for penalties. Partner should try to take out into a long suit with a very weak hand with fewer than 5 high card points
  • Over suit openers, including weak preempts, double is for takeout. Later in the auction, double over 3♠ or higher is for penalties
  • A negative double or redouble denies partner's opening suit and (usually) offers major(s) (with balance of points)
  • A responsive double may follow partner's takeout double, suggesting any suit will do

Finding NT contracts

  • With enough high card points in the partnership (22 for 2NT, 25 for 3NT), BriJ bids suits to show cover. The contract ends with the 'least bad' suit if there is no cover from either partner in a particular suit

Showing a strong hand

  • BriJ observes the usual conventions of reverses (bidding over the barrier corresponding to a simple raise of my last bid), jumps in the same suit (showing 6 cards), jump shifts (bidding over the barrier in a new suit).
    All these bids show extra strength beyond a normal opening hand, typically an additional count of 2 - 6 high card points and a reduction of 1 or 2 in the losing trick count

Playing conventions

Defence leads (in rough order of preference)

  • Top of touching honours: a sequence of 2 or more in a suit contract; a sequence of 3 or more in a NT contract
    (In BriJ, ‘touching’ takes account of cards already played and can also take account of cards seen in dummy)
  • 4th down from an honour card
  • Singleton or Top of doubleton (in a suit contract)
  • 3rd down from an honour
  • Middle-up-down or trump lead if nothing better

Signalling

  • Count: high-low = even
  • Count: low-high = odd

Discards

  • No special methods as yet

Some jargon you need to understand when you feel ready

  • Points, strictly "high card points" (hcp), are one measure of how strong your hand is. Count 4 for each ace, 3 for each king, 2 for each queen and 1 for each jack. A hand with 10 points is average because the whole pack has 40 points. An opening hand usually has 12 points.
    In BriJ the point count is automatically adjusted to allow for your playing position, e.g. to "add a king" in the take out seat and "get in the way" of opposition bids under some circumstances
  • A doubleton is a suit from your hand with just 2 cards
  • A singleton is a suit from your hand with just 1 card
  • A void is a suit from your hand with no cards present
  • A balanced hand is one with no voids, no singletons, at most one doubleton and (usually) no 5 card major
  • The losing trick count (ltc) assesses hand strength in a suit contract, created by its shape.
    BriJ uses a standard technique to estimate how many tricks a particular hand will lose:

    Look at ace, king, queen and jack in each suit and count losers up to a maximum of 3 per suit.
    For example count 1 loser for Ax (x is just a non-picture card). After 2 rounds are played, you can ruff (trump) the 3rd round so we assume just the 1 loser. In a bit more detail, count:

    * A void = 0 losing tricks.
    * A singleton other than an ace = 1 losing trick.
    * A doubleton AK = 0; Ax or Kx = 1 losing trick; xx = 2 losing tricks.
    * A three card suit AKQ = 0 losing tricks; AKx, AQx or KQx = 1 losing trick.
    * A three card suit Axx, Kxx or Qxx = 2 losing tricks; xxx = 3 losing tricks

    The total count for all the suits in your hand is used to help in bidding. Typically a suit opening hand will have 7 losing tricks and a NT hand will have 8 losing tricks. Think in terms of game if you and your partner have a combined losing trick count less than 15.
  • No trumps (NT) describes a contract where no trump suit has been selected
  • A jump bid is one where a lower bid in the suit would have been legal. A jump by opener signals strength whereas in an overcall, it often signals weakness in combination with a long suit
  • Aggression level determines whether BriJ exaggerates the strength of a hand it is bidding. The effect can be an assumption of increased high card points (e.g. add a King in the take-out seat) and / or a reduction in the losing trick count (e.g. when the opposition has doubled your partner's opening bid and we have a fit). The extent of the effect depends on vulnerability and the hand's position in the bidding round as well as the aggression level you set. Level 1 makes few adjustments. level 3 uses maximum aggression
  • A game in bridge is an auction that reaches the 4 level in a major suit contract, the 5 level in a minor suit contract or the 3 level in NT. Typically the partnership needs 25 hcp for a NT game, but game in a suit contract often depends more on shape than high card points . After a limit NT bid such as a 1NT or 2NT opener, partner can assess there is potential for game by making use af partner's maximum possible hcp

More to come....