Tricks AB, 1
YZ, 0
1. Z A↷ Y B
4♦, Kg♦, 8♦, 5♦

Trick 2.

Tricks AB, 2
YZ, 0
2. Z A↷ Y B
7♦ A♦ Qn♦ Knv♦

Trick 3.

Tricks AB, 3
YZ, 0
3. Z A↷ Y B
2♠ 10♠ 3♠ Knv♠

Remark.—Y has the king of spades.