1 No Trump

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GEELSE BRIDGE CLUB

 

lokaal Geels Brouwhuis

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1 No Trump

from 12 -15 hp or 26-31 zp,

balanced, 4333, 4432, 5332

no 4 card major

 

Answers - undisturbed

 

  • Pass : to play

 

  • 2♣ : The DUKE-convention (see Strategy in menu). The opener is expected to bid 2♦. The weak partner with a 5 card ♦ will pass or bid his 5 card major 2M. Having a two suiter with 10-11hp, he can show this via 2NT (both minors), 3♣/♦ (5c ♣/♦ and 5c♥ ) and 3♥/♠ (5c ♣/♦ and 5c♠ )

 

  • 2♦ : RF, 10+, relay bid . Asking to describe further the hand of opener with the conventional sixpack-answer : s123/456 (min and no 5card,5c♣,5c♦) / (max and no 5card,5c♣,5c♦). Then the continuation is natural.

 

  • 2♥/♠ : RF, 10+hp, 5c ♥/♠ (no Jacoby transfer !) . Note that - due to the openings conditions - opener has ALWAYS a 3-2 or 3-3 card in the majors. His reply now is again stepwise simple :

s12 = min w/ 2-3c support M

s34 = max w/ 2-3c support M

s56 = max , 2c M with 5c ♣/♦

  • 2NT : NF, 10-11 hp,

 

  • 3♣/♦: NF, 10-11 hp,6+c ♣/♦
  • 3♥/♠ : NF, 8-9hp, 6+c ♥/♠

 

  • 3NT/4♥/♠ : to play

P

meaning

O

meaning

P

meaning

2♣

Duke

2♦

obligatory

pass, 2x

2NT,3x

 

see duke

2♦

RF, 10+hp

s123/56

min/max n0 5card,5c♣ ,5c♦

 

 

2♥/♠

RF, 10+hp, 5c♥/♠

s12/34/56

min, 2c,3c/max,2c,3c/max,2c,5c♣/♦

 

 

2NT

10-11hp,

 

 

 

3♣/♦

10-11hp, 6c♣/♦

 

 

 

 

3♥/♠

8-9hp, 6c♥/♠

 

 

 

 

The 1NT opening forms together with the 1♦ opening a tandem to treat all hands without a 5 card major.

It is worthwhile to notice that Stayman is not necessary as the opening never contains a 4 card major. Yet, it hinders the opponents who have to enter the auction on level 2, not without risk.

When opponents overcall 1 NT ?

 

If the opening is doubled, we apply the HELVIC procedure :

 

  • 2x = two suiter in x and x+1
  • pass = or 9+hp or two suiter in shape suits. If RHO passes, the opener must redouble. Partner with9+hp will now pass and else bid the lowest suit of his shape suits.

 

  • redouble = 5c in a suit to be named after pass by LHO and 2♣ bid by opener

 

If RHO does not pass, the opener may not bid anymore. The danger of a penalty double has disappeared.