In a 44 boards tourney we had 2 times trouble with this decision.
We play 15-17 NT and both times the auction went 1NT 2♣! Dbl (we play Lebensohl)
case 1: 2♣ was DONT = ♣s + any higher, the full sequence was:
1NT 2♣! dbl 2♥*
pass 2♠ dbl all pass
alerted (!), I asked and LHO said, his p does not like clubs, he was not really sure what 2♥ showed (♠-group)
He fell 2 times but we should have been playing 3NT.
case 2: 2♣ was a self-made convention, aked for majors but could have been any hand without majors. The full sequence:
1NT 2♣! dbl pass
pass 2♥ dbl all pass
Scoring: MP
Partner led a trump, won the ♦return with the Q, LOW♠ (we play attitude there) which declarer won with the A, playing a low♣ from dummy which I won with the K. Do you have an idea of the whole distribution right now? I had not and played trump A, followed by a ♠. Partner held ♠Kx, so I must have been playing ♠, p returns trump to my A and I could give him a ♠-ruff. We set this contract only 1 time for a zero, others played again 3NT.
My LHO is known as "crazy and fearless" bidder, he was 6-4 in the majors with 4pts.
My questions now:
A.) Who, opener or advancer, decides under which conditions to dbl opps or to play 3NT, if Lebensohl is out because both are balanced? I >felt< both times that we should play 3NT but I followed the captaincy principle (wrong understanding here?)
B.) Which weapons do you have against NT defences in general? Just Lebensohl?
C.) Which weapons do you use against such "could be this or could be that, does not necessarily show that and that"-conventions?
D.) Which exact meaning has partner's dbl?
Caren

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