contra 2-3 opening

General

 

A lot depends of the meaning of the 2 opening : is it strong ? is it weak ? Is it a multi ?

 

When the opening is strong and you also hold a strong hand it is best to pass and see how the auction evolves.

 

When the opening is a multi (with weak and strong variants) and you hold a strong hand, the chances are high that the opening is weak. When there are good indications that the opening is weak, start your defence.

 

In general, our approach is natural : an suit overcall is a 5 card, a double promises at least a 3 card in the other suits. Yet, we put in place a special defence against 2 multi and we elaborate a bit on the defence against a weak 2M opening. There is also room for the "world convention".

 

Against 2 multi : Polish approach

 

Partly natural : an overcall is a 5 card, constructive, 2NT promises 15-18hp with stops in both majors

Partly conventional : double (by first defender) is a take-out double with respect to a weak 2 hand, meaning short in spades and at least a 3 card in hearts. WIth less than 3 card hearts and less than 15hp you pass for one round. If the opener holds hearts he will pass upon his partners 2♥ (P/C) . Now you can double to show your spades.

Against 2 ♥/ ♠ weak

 

Natural : an overcall is a 5 card, constructive, 2NT promises 15-18hp with stop in the opened major.

Double is a take-out on which his partner will apply 'Lebensohl' in order to differentiate between a constructive hand and a weak hand :

Eg. (2 ) X - (pass) - ?

3x = longest suit 8-11hp

3♠ = asking for a stop in ♠

2NT = weak or strong MF. The doubler must react with 3♣ (P/C).

The 2nd defender, when weak will pass or correct to 3x in his suit.

When strong : 3= GF, 4c , no stop in .

3NT = GF, 4c, stop in .

Against natural preemptive openings on 2 or 3 level :

 

WORLD convention

 

Defending with 4minor :

if cuebid in a minor : 2x5c M

if 4 am : 5c am + 5c ♥ /♠

if 4 m : 5c m and 5c AM

if ZT : 2x5c m

 

After 2/3 :

4♣ =>5+♥ and 5+♠ : a cuebid on level 4 promises both majors

4♦ =>5+♦ and 5+♥ /♠ : the other minor on level 4 promises a 5+c in that minor and a 5c M

 

After 2/3♦ : (not multi !)

4♣ =>5+♣ and 5+♥ /♠ : the other minor on level 4 promises a 5+c in that minor and a 5c M

4♦ =>5+♥ and 5+♠ : a cuebid on level 4 promises both majors

 

After 2/3♥ : (weak 2, Muiderberg, ...)

4♣ =>5+♣ and 5+♠ : no minor cuebid, so natural

4♦ =>5+♦ and 5+♠

4NT => 5+♣ and 5+♦

 

After 2/3♠ : (weak 2, Muiderberg, ...)

4♣ =>5+♣ and 5+♥ : no minor cuebid, so natural

4♦ =>5+♦ and 5+♥

4NT => 5+♣ and 5+♦

 

After 3 /3NT (Gambling)

4♣ =>5+♥ and 5+♠

dub => 2x4c M