Deal 7	♠ A K 9 6 5 2 ♥ 10 9 8 3 ♦ 4 ♣ A 8		WEST   NORTH   EAST   SOUTH 1♠ pass 2♣ pass 2♥ pass 3♥ pass 4♥ pass pass pass North has 13 points and naturally opens 1♠. South, with 15 points, would bid 2♥ in standard bidding, but with 2/1 this promises a 5-card suit. So instead, South responds 2♣, forcing the partnership to game. Note that holding two 4-card minors South bids them up-the-line, just as in standard bidding. North has a nice 6-card ♠ suit, so you might think he would rebid them. But Opener's first responsibility with his second bid is to show a 4-card Major if he has one. This isn't much of a suit, but North still bids 2♥. You can see why it is important for Opener to show a 4-card Major. Since South couldn't bid ♥s in her first response the fit would have been lost if North had not mentioned the suit. South now confirms the trump suit with a 3♥ bid, and North shows his minimum by just bidding the game.  Deal 8
	♠ 7 ♥ A K 7 5 ♦ K 7 6 2 ♣ K Q 10 6