Sometimes players need to gain time on the clock by repeating the position, but most often its purpose is to wear down the opponent psychologically.
Pal BenkoAccording to such great attacking players as Bronstein and Tal, most combinations are inspired by the player's memories of earlier games.
Pal BenkoThere is nothing wrong with trying to exploit the natural human tendency to become impatient when forced to play a boring position.
Pal Benko