Q♦ 8♦ 5♣ x-------------x | Y | | | K♥ 8♥ 4♥ | A B | K♦ 10♦ 4♣ | | | Z | x-------------x A♥ J♥ 5♥ Hearts are trumps. The remaining trumps are all with A and Z. Z should lead ♥ five.