All Vulnerable		North 5♣		Contract : 6♣
Declarer (W) ♠  K ♥  K ♦  A Q 10 7 ♣  A K Q J 9 7 4	A♣ w		3♣	Dummy (E) ♠  A 10 7 4 2 ♥  Q 5 ♦  J 8 6 4 ♣  10 3
		> 2♣ South
Having lost one trick already, Declarer must win all remaining 12 tricks. He can only do this by taking the finesse in diamonds in the hope that the K♦ is onside (held by South). A 50% chance. Declarer needs therefore one entry to Dummy's hand, and there is one : Dummy's 10♣ *. Declarer should therefore win the first trump trick in his own hand with th A♣. What does Declarer lead next ? * There is a 2nd possible entry to Dummy in ♠s by overtaking Declarer's K♠ by Dummy's A♠. But this would be wasteful and is not necessary here.