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67B1 - The lebensohl convention -
level 1 ★
Le Lebensohl convention is used by the responder, after his partner opened 1 NT and an overcall by the opps. we describe here a simple version of the convention which is not used in Ibridge exercises.
There are two configurations
If you have enough strength to bid game and a stopper in the opps suit : your response is a cue bid (Stayman), 3 SA (without a card Major ), or bidding a suit at the 3 level (with a card Major or a ) card minor
Without a stopper in the opps' suit bid 2 NT forcing bid transfer for ♣, or a suit at the level (natural bid, weak)
Finally, a double is punitive/li>
S
W
N
E
1NT
2
2NT
K
J
8
10
9
5
A
6
5
J
10
9
8
Problème E5617 2 NT that shows the lack of a stopper in ♥
S
W
N
E
1NT
2
3NT
K
J
8
A
J
9
5
10
6
5
J
10
9
Problème E5618 3 SA that shows the ♥ stopper and enough strength to play game (and debies 4 cartes in ♠).
The 2 NT bid
It shows:
An ambiguous strength , Game is possible, but not certain.
and, a lack of stopper in the suit of the overcall
After that bid,will rectify to 3♣ and the responder will :
Pass with 6 cards in ♣
bid 3 ♦ with 6 cartes in ♦
Cue bid = Stayman
bid 3 ♥ ou 3 ♠ : naturel avec 5 cartes
bid 3 NT, natural ...without a stopper in the suit of the overcall.
S
W
N
E
1NT
2
2NT
Pass
3
Pass
3
A
J
8
3
10
9
5
A
6
5
J
10
9
Problème E5622 3 ♥ Stayman for ♠
S
W
N
E
1NT
2
2NT
Pass
3
Pass
Pass
K
J
3
10
9
K
J
8
6
5
3
J
10
Problème E5623 PASSGame is unlikely...
With a stopper in the opps's suit and strength to bid game
as if the opps had remained silent you will investigate what the best game is
The cue bid is a Stayman
3 SA to play them
3 level bids are natural and forcing : they show 5 cards in the Major or 6 cards in the minors
S
W
N
E
1NT
2
3
K
J
10
9
8
K
J
9
10
6
J
10
9
Problème E5619 3 ♠ Forcing, the opener will conclude at game: 3 NT with the ♠ fit, or 4 ♠ with the fit.
Xith a weak hand
With no possibility of a competitive bid...you must pass !
Otherwise : you can bid at the 2 level with a 5 card suit.CIt is purely a competitive bid and the opener will pass (in general..).
S
W
N
E
1NT
2
2
Q
J
10
9
8
J
9
10
6
5
J
10
9
Problème E5620 2 ♠ Non forcing bid that shows a weak hand and 5 cards in ♠ with no ♥ stopper
2 NT that shows the lack of a stopper in ♥