Q:

Who is Mr. Gold in the movie Revolver?

I have loved the movie Revolver and I cannot control my urge of fully understand it. From what I could make out of the movie, it is purely an analogy to chess. The characters of the movie are all pieces of the chessboard.
So who is Mr. Gold? Please give valid explanations to your theory!

A:

From the Wikipedia page on the movie: 

Sam Gold is seen to be the 'king' in this chess game of gang warfare.
  He is the ultimate figure that all men are supposedly aspiring to be.
  Sam Gold is revealed to be an ultimately powerless cipher, whose power
  is granted only by those who invest in him. He represents ego and
  self-investment. He is the personification of greed

A:

The movie isn't an analogy to chess. The movie is about the illusion that imprisons every one of us.
Deep beneath the films violence, blood and grit, lurks a spiritual and enlightening message - a message echoed throughout time by revered figures such as Buddha and Bodhidharma, a message also echoed in Kabbalah (which is probably where Guy Ritchie drew his inspiration from, as his then-wife, Madonna, is heavily into Kabbalah). And that message is this: we are not our ego; the ego, far from being our friend, is responsible for most of our pain and misery; the ego is a product of the mind and creates the illusion of separation, the ego is a prison, a prison that very few people recognise as such.
To answer your question: Mr. Gold is everyone's ego. In Jake's case, Mr. Gold is the part of Jake who wants to kill Macha.

