Chess: king, queen, knight, pawn
|king of the castle(BrE)/hill(AmE)
|the most successful/powerful person
|Mark Zuckerberg is king of the social networking castle.
|a king’s ransom
|a large sum of money
|We paid a King’s ransom for a simple hotel room in the centre of New York City.
|live like a king/queen
|live in luxury/comfort
|Live like a king for two weeks with our unbeatable holiday packages.
|to queen it
|act in a superior way to others
|I don’t really like Janine. She’s always queening it over us. Telling us what to do, treating us like slaves.
|A knight in shining armour
|a person who helps or saves someone in a difficult situation
|If things go wrong, will you be my knight in shining armour?
|be a pawn in someone’s game
|have no power/be manipulated or used by others
|To him, I wasn’t a friend. I was there to help him. I was a pawn in his game of power.