Tricks AB, 2
YZ, 0
2. A↷ Y B Z
Qn♠ 3♠ 5♠ 7♠

Remark (Trick 2).—Y has called for trumps. Z, having four trumps himself, commences to echo his partner's call.

Trick 3.

Tricks AB, 2
YZ, 1
3. A↷ Y B Z
8♠ 7♥ Kg♠ 6♠

Remark.—Z completes the echo of the call.

Trick 4.