Problem

The Auction:

East passed. South opened with 1♥. West doubled for takeout. North responded 2NT (+ 8 HCP at least 4 hearts). South declared 4 hearts.

West wins the first trick with the ♥A (trick 1) and leads the ♣J next.

As both South / North hold three diamonds with the only stopper being the declarer`s ♦K – how can the declarer restrict the losers to three tricks as West probably holds most of the missing honors?

Vul: Both

Contract: 4♥ by South.