How to play bridge?(2)

Now, we all know that the contracts can be divided into two categories, trump and no-trump. Last time, I was talking about the no-trump contract. Today, I want to introduce how to play the "trump contract".

Take this game for example. If you are sitting at South, and you are playing 7S. How to play?

The first step is counting how many tricks you can win. However, the trump contracts are more complicated than no-trump contracts. The most important reason is that there is one special skill in the trump contract, which is called "ruff(王吃)". Because the trumps are the biggest cards in the game, you can win the tricks by using trumps to "ruff" the other suits. The only requirement is that when you ruff the trick, you should not have the suit in your hand.

Look at this picture. How many tricks you can win directly? Eleven. You can win 6 spades, 3 hearts, 1 diamond, and 1 club. However, if you use the trumps to ruff the small diamonds in your hand, you can win 2 more tricks, then you can make 7S.