Enfilade is a concept in military tactics used to describe a military formation's exposure to enemy fire. Well, the same concept applies in a game of chess. Check out this video tutorial from Grandmaster Alexandra Kosteniuk that shows you how to use the technique called enfilade. This chess position was taken from a 1737 chess book. White plays and wins by playing the rook and sacrificing it. See how the endgame of chess is really played.