Scotch is an aggressive opening. Here are some lines to remember. In this line, black allows to triple its own pawns. After a queen exchange, black loses its castling rights. And the final punch is a treat to watch. Following is a game play...
In this end game combination which appears very frequently with Colle System, black develops all his pieces on queen side, letting us attack the king side.
This is from a recent game I played with white against a 1400+ rated opponent. The game starts with the Colle System. Look, how easy it is to trap a queen.
