How does paragraph 6 mainly add to the development of Mr. White?

Paragraph six of "The Monkey's Paw" helps to illuminate the impulsive nature of Mr. White.
While Mr. White plays chess with his son, he tries to divert Herbert's attention away from the board because he realizes that he has made "a fatal mistake." Then, he continues to try to distract his son by speaking about the wind. Herbert then calls checkmate on him, and he loses the game. 
In paragraph six, Mr. White again exhibits spontaneous reactions. He seems angry about having lost the game of chess because, after Herbert calls checkmate, he speaks with "sudden and unlooked-for violence." Further, he complains about where their house is located, saying that the road they are on is a terrible place to live—"This is the worst."
Therefore, the reader learns from this paragraph that Mr. White is discontent with his life and angry that he has lost the game. He is also a man who acts on impulse because he moves his chess piece too quickly, and he reacts with "sudden" emotion. These characteristics are indicators that he would be interested in the magical powers of the monkey's paw and how it could change his life if it brings him his main desire.