Tactics in chess, for those whom are familar with the game,are the interactions of pieces that are deeper than simply taking material(s) that the advarsary has blundered off. The cordination of the chess pieces in a manner in which the pieces use their designated "abiltities" to accomplish an advantage is tactics.
Tactics are the backbone to practical chess. When learning tactics, it is more important to know and understand individual tactical devices, then to know their names. The knowledge of tactics gives rise to combinations, lending to stratedgy.
One of the tactics players encounter first encounter as they begin chess is the pin. A pin occurs when a piece is attacked, not necessarily threatened with capture, by an opposing player piece; thus preventing or discouraging it from moving from the line of attack since the this action would open up an attack upon a more piece behind it. Note: The rules of chess make a pin against a King an absolute pin, which cannot be broken unless the King moves,another piece comes into the line of attack between the King and the pinned piece, or if the pinning piece is captured. Pins often give rise to the win of material. When a piece is pinned and imobile, all it takes is a pawn attack to place the piece is terrible danger. Often at the price of the piece for the attacking pawn, a good trade for the attacker.
Pins quite frequently form the basis of simple material winning combinations, on the basis of attack using a pawn. Here is a simple example.