Scoring: IMP
(1♣) - Pass - (1♦) - Pass
(2♥) - Pass - (Pass) - X
(Pass) - ???
1♦ = T-Walsh
2♥ = Unbalanced minimum with exactly three hearts.
2)
Scoring: IMP
(1NT) - Pass - (2♦) - Pass
(2♥) - Pass - (2♠) - Pass
(3♠) - Pass - (4♠) - ???
15-17 and transfer ordinaire
3)
Scoring: IMP
Pass - (1♦) - 2♠ - (3♥)
Pass - (3NT) - Pass - (Pass)
???
Opener cannot hold a balanced hand.