This text is sectioned according to the nature of the opening bid:
1. Opponent opens with 1 of a suit - (neither alerted nor strong)
- 1 of a suit natural
- Alerted minor openings
- A 1 NT opening
- A weak '2' in any of D¦H¦S
- 3-level pre-emptive bids
- 4-level pre-emptive bids
There are a considerable number of options available, not to forget PASS!
T-O Double (12)13-15 with some support in unbid suits. With 16+ a double is Mandatory unless a more precise bid listed below fits like a glove!
PASS. Nothing to say. Note: In this scheme of things, when holding strong defensive
values in the opponents suit one is obliged to PASS and await any action taken by
partner - preferably a PD which can be converted to penalties if this
makes sense. Note: a T-O double is not suitable in this case.
Natural suit overcalls Usually a 5+ card at 1-2-level. At the 2-level at least 1 1/2 Quick tricks is desirable. These bids have a wide range. Partner should treat them as a 3rd hand opening. Opener must correct if appropriate.
Jump ovrcalls in a 6+ card Major suit: intermediate values, vulnerability sensitive: NVul 8-11, Vul 11-14
2NT: Weak 2-suiter. Shows Highest & Lowest unbid suits at least 5-5
Cue-bid: Weak 2-suiter. 2-suited in highest 2 unbid suits 5-5; jump cue-bid same but strong.
Jump cue-bid. Shows a strong 2-suited hand in the two highest ranking unbid suits
3¦: Strong 2suited overcalls : The bid minor + highest unbid Major suit
Pre-emptive double jumps in any new long suit.
1NT: frequently 2-suited 5-4 in lowest 2 unbid suits. Promises 4 card in the lowest unbid minor. Can be either weak or strong. Summary of possible meanings exposed by the rebid.
a 1NT overcall offers a number of other strong possibilities such
3-suited in the other suits or 6-4 hands (that's 4 in the anchor suit
and 6 in an unbid Major suit at the 3-level.
2. Alerted minor opening bids
Defences are listed below:
- 1C strong 16+ e.g.precision or any other strong club system
- 2C strong 23+ as in ACOL or as in Standard Americain or 2/1
- 1C short i.e. <=3 card - could be a 5 card Major version or even'Beta itself!
- 1D short 12+ e.g. precision (12-15)
- 2D Multi usually 2 or 3-way. (Beta plays it 3-way)
1 Club Strong 16+
Beta advocates use of TRAP strongly. This is very aggressive - as it needs to be!
If you still have a precision or similar system pair in your club - try it out!
Essentially the idea is to rob them of their advantage of having more
bidding room to manouver in and they will be less likely to double you
in a 1¦2 level contract when they have game potential
Pre-emptive bids with a good 7 card suit make for excellent defence - unlikely to come unstuck!
I am less confident of the utility of 5-5 2 suited overcalls
2 Club Strong 23+
Certainly more risk here - watch the vulnerabilities attentively!
Any intervention has a risk BUT when you disrupt their bidding and get a result it is worth a great deal!
A 6 card suit 2-level overcall can disturb any coded responses which an
increasing number of pairs are favouring including Beta! rather than
the old 90+% 2D response
However a really good 3-level 7+ card pre-empt can provoke difficulties eliminating a whole level of bidding.
More dubious are 2-suited overcalls at least 5-5 these can come
backfire: *: C+S; 2D: D+H; 2H: H+S; 2S: S+D; 2N: both minors. We
don't advocate them over a 2C opening - Beta prefers an alternatively
variation mentioned under TRAP.
1 Club Alerted 12+ can be <=2 Cards
Beta into this category!
Our primary advice is to call 2C with good values & a 5+ card Club
suit! If you do not do this it can be very difficult to find a Club fit
later on. On the other hand it also robs the opponents of any advantage
that can be obtained with 1-level responses.
In the case of Beta, responder is no longer required to bid with 0-5HCP
and will now give his normal responses with 6+ at the 2-level.
Weak jump overcalls are also available too.
A Forcing T-O double is available for solid opening bids 12+ HCP <=7 1/2 LTC with no upper limit with some support ineach of the other 3 suits.
1 Diamond Alerted 12+ can be <=2 Cards
Same advice as for 1C! above - bid 2D naturally with a 5+ card Diamond suit
Weak jump overcalls are also available too.
A Forcing T-O double is available for solid
opening bids 12+ HCP <=7 1/2 LTC with no upper limit with promising
minimum support in each of the other 3 suits.
Overcall a Precision artificial 12-15 opening bids as follows: bid your
shortage suit - can be met very effectively with a 2C!
shortage bid! Consider a 1NT! showing both minors; 1S
can show a Strong balanced hand lsuch as a 1NT 15-18. opening.
2 Diamond Multi
Again Beta uses this opening in a 3-way style.
Over alerted minor openings we advocate:
PASS unless the following suggestion is available.
* is a 16+ Take-out double short in Diamonds.
3. 1NT balanced opening (12-14 ...15-17 and all 3 point ranges in between
Note: Over 15-17 NT the following remains valid but when vulnerable exercise serious extra caution.
When non-vulnerable the risks are greatly reduced.
Note: When vulnerable exercise more caution too - more distributional: e.g suits 5-4-3-1 or better
Our preferred 2nd position defence:
CDH & Rubinsohl
2 5+ card natural
*2*: T-O Double 15+ HCP may be passed ONLY when expecting penalties. Usually 6+ HCP.
action with 2 suits (one a minor): CD: It is conventional now to bid 'up-the-line' -
a wriggle may
then take place if any bid is unacceptable (0-2 cards) in an attempt to
get out in a higher ranking suit and hopefully a better fit. Wth 3+
card support partner's bid should be passed unless guaranteed a fit in any higher suit. Bidding should not pass
2NT except with a 6+ card suit. Note: a 4333 hand my require a 2C bid on 3 ca higher suitrds!
Single suited hands with a 5+ card Major may be bid directly in response of a T-O Double.
If RHO bids Redouble alerted (conventionally usually weakness
asking for a 2C rebid which he may PASS or name his 5+ card
suit.) PASS is the usual bid if preferring penalties.
Otherwise bid 2 any as above.then PASS
can be the best option unless holding a good quality suit which can now be shown naturally at the 2-level. If the redouble is natural (to play) Bid your 5+ card suit (taking out your partners double) or PASS with 6+ HCP
Opponents open 1 Club Strong (16+) - E.g. Precision
Any club length See TRAP
Opponents open 1 Diamond Precision
See BetaAcol Suggested Defence
Based on principle of treating artificial bids ARTIFICIALLY!
In particular we do not overcall holding a Major - unless making a weak 2 or 3 Jump overcall.
Opponents open 1mi! (12-15 and alerted as possibly 2 or less cards)
Beta uses an alertable 1C. Beta 1C worst is a minimum of 2 cards ih regular distributions
1NT multi: See 1NT overcall for complete details uses are the same as given above too. Note: Anchor suit is always lowest unbid minor and at least 4 cards..
2mi: (opponents minor!). Natural 5+ card - Not both Majors
All other bids are as given above over 1 of a suit openings. Exception is the loss of the cue-bid which is now natural as above
(There is an alternative defence, rather complex, only played by agreement - see Math6 'Attack is the best defence') Not currently in betaacol standard *4*
Protective Double Up to 14(15) HCP