Score: Four-all.

Queen of spades turned up.

THE PLAY.

Trick 1.

Tricks AB, 0
YZ, 1
1. Z A↷ Y B
6♣ 10♣ A♣ 2♣

Trick 2.

Tricks AB, 1
YZ, 1
2. Z A Y↷ B
Kg♦ A♦ 3♦ 6♦