Prophylaxis

The method of playing chess wherein a player prevents the opponent from playing good moves is Prophylaxis. The opponent will not be able to play tactical moves, due to his position becoming worse. The advantage of such a style is to avoid risk; in case the opponent is an attacking player, he may get frustrated, lose patience and commit blunders.

Famous masters who popularized this style were Aron Nimzowitsch, Tigran Petrosian and Anatoly Karpov. Play through one such wonderful example on Chessgames --> Click Here

Play through a nice video of Petrosian's game below.