I play for spade 3-3, clubs 3-2 and heart 4-2 so i suppose to have 9 triks 3 spade, 2 heart, 4 clubs, i need only 1 trick, so i play K and A of heart and heart and i discard a daimod. Now the defence can play daimod and daimond and i cut in dummy my 10 tricks, or play spade and i cut another heart.