SC4

4.1 Finding a Fit

4.2 What Can Partner Cover?

4.3 Partner's Suit is Useful

4.4 Partner's Shortness is Not Useful

4.5 Partner Never Shows the Shortness

4.6 How Many Trump Does Partner Have?

4.7 Impossible Spade

4.8 Singleton or Void

4.9 Preempting Helps Evaluation

4.10 Weak Freak