Tricks AB, 1
YZ, 0
1. Y B Z A↷
6♣ Kg♣ 4♣ 3♣

Remark (Trick 1).—A defensive trump lead, to avoid opening a three card suit.

Trick 2.

Tricks AB, 2
YZ, 0
2. Y B↷ Z A
7♣ A♣ 8♣ 5♣

Trick 3.

Tricks AB, 3
YZ, 0
3. Y B↷ Z A
8♦ Kg♦ 6♦ 5♦