DS-SD 1     Bidding : 1♣ - 1♠ - 2♣ - 2♦ - 2♠ - 3♠ - 4♠ - Pass
Opener ♠ - A 8 3 ♥ - A ♦ - 9 7 6 ♣ - A J 10 6 5 4		Responder ♠ - K 10 9 6 5 ♥ - 7 3 2 ♦ - A Q J ♣ - Q 2
Responder bids his "false" (3-card) diamond suit in order to enable Opener to show 3-card delayed spade support. Without spade support Opener would have rebid his clubs once more, denying a heart stopper.
DS-SD 2     Bidding : 1♦ - 1♥ - 2♦ - 2♠ - 3♥ - 4♥ - Pass
Opener ♠ - A 4 3 ♥ - K 7 6 ♦ - A Q 6 4 3 2 ♣ - 4		Responder ♠ - K Q 5 2 ♥ - Q 10 8 4 2 ♦ - 5 ♣ - A J 3
Responder's bidding does not reveal whether he holds 4 or 5 hearts. All the same Opener must show delayed 3-card heart support.
DS-SD 3       Bidding : 1♦ - 1♠ - 2♣ - 2NT - 3♠ - 3NT - Pass
Opener ♠ - K 9 5 ♥ - 4 ♦ - A K 9 7 3 ♣ - A Q 10 3		Responder ♠ - A 10 8 2 ♥ - K Q 10 ♦ - Q 8 5 2 ♣ - 9 6
Opener must show his 3-card spade support after Responder's 2NT. Responder with only 4 spades and the hearts covered bids on to 3NT.
DS-SD 4     Bidding : 1♠ - 2♥ - 2♠ - 3♦ - 3♥ - 4♥ - Pass
Opener ♠ - K Q 8 6 4 3 ♥ - K 2 ♦ - K Q ♣ - 7 6 4		Responder ♠ - 2 ♥ - A Q J 10 5 ♦ - A J 8 4 3 ♣ - 3 2
Responder's 2♥ shows 5 hearts. Opener's delayed raise therefore only shows 2-card support. Responder, with a strong heart suit and no club stopper goes for 4♥ © 2013 Michael Furstner