Tactic

In chess, a tactic refers to a sequence of moves that limits the opponent's options and may result in tangible gain. Tactics are usually contrasted with strategy, in which advantages take longer to be realized, and the opponent is less constrained in responding. The fundamental building blocks of tactics are move sequences in which the opponent is unable to respond to all threats, so the first player realizes an advantage. This includes forks, skewers, batteries, discovered attacks, undermining, overloading, deflection, pins, and interference. Other tactical categories are double attack, pawns breakthrough, blockade, decoying, discovered attack, passed pawn, X-ray attack, interception, deflection, pin, demolition of pawns, annihilation of defense, pursuit (perpetual attack), intermediate move, space clearance and more. Often tactics of several types are conjoined in a combination.