Deal 4
 
 
 
♠ A K J 8 6 5
4 3
7 5
♣ K 6 3
 
 WEST  NORTH  EAST  SOUTH
1♠22
pass2♠passpass
pass

North has a minimum 1♠ opening bid.
After East's 2 overcall both North and South know that the 2/1 Game Force in no longer on. South can therefore bid 2, showing at least 11 points. This bid is forcing on North for 1 round, but not forcing to game.

North next rebids his ♠s, promising a 6-card suit, but also indicating a minimum strength hand! Since the Game Force is not on, North would have to make a jump bid to show extra strength.

South has nothing further to say so the partnership arrives in a safe contract.

 Deal 5 
  ♠ Q
A 9 8 6 5
9 6 2
♣ A 7 4 2