Sentence:  <WSD>Angle shots</WSD> are used to gain an unfair advantage in the game-to obtain information that a player shouldn't legally have yet, or to manipulate opponents. What can make <WSD>angle shots</WSD> so frustrating is that they are nearly always impossible to prove. 
Meaning of the word marked with <WSD> tags:  An act performed in order to angle-shoot; a trick used to gain unfair advantage.