♥ K J 10 8 6 5 3
♦ K Q
♣ 8 7
| WEST | NORTH | EAST | SOUTH |
| 1♠ | |||
| pass | 2♥ | pass | 3♥ |
| pass | 3♠ | pass | 4♣ |
| pass | 4NT | pass | 5♥ |
| pass | 6♥ | all pass |
South opens 1♠, her 5-card Major and North responds 2♥.
South knows this is a 5-card suit, and bids 3♥, confirming the 8+card trump fit.
Once the trump fit is known, North revalues his hand to about 19 points. He makes a slam try with a control-showing bid of 3♠. He knows South won't take this as ♠ support since the partnership has agreed that ♥s are going to be trumps.
South now shows her control by bidding 4♣.
That was what North needed to hear; when Blackwood uncovers two Aces he bids 6♥.
The slam is a good one. If either the ♠Q or ♣K is right there are 12 tricks by way of a finesse. But the best way to play the hand would be to try to establish a ♠ in the South hand, and if that fails try the ♣ finesse.
Deal 11
♥ A Q 7
♦ 8 4
♣ A Q J