The Deflection

According to the Chess Tactics Guide, a deflection is "a cunning kind of decoy tactic used in the build-up to a main assault, where your opponent has a piece guarding a square or region of the Chess Board that would give you great attacking potential." 

Here is another link to a puzzle of a historic game:http://www.chess.com/news/weekly-chess-puzzle-8981

Use the deflection carefully, as it may cost you the game if you sacrifice a piece without calculating the best moves your opponent can make.

Here is a beautiful game:

Good luck with your chess!