To me, the mood set in these first six paragraphs (up to the end of the chess game and what Mr. White says when he loses) is a pretty fun mood, but mixed with a few signs of danger to come.
I say that it is fun because the weather outside is bad but the family is having a fun time. The father is playing chess kind of badly and then trying to distract his son so he won't notice that he can win. That seems amusing and fun.
But the weather is bad and that's ominous. And Mr. White does get mad and complains about what their neighborhood's like (although that seems like it's just an excuse to complain).
If I didn't know the ending, I wouldn't think much of the bad stuff, though. I would think it was a fun mood that is being set.