The chess nerd is unhelpful by nature, hardly laughs unless someone gets the 12th move of some opening wrong and he generally dislikes people. He feels superior to everybody rated lower than him or anybody that does not play chess and hates people rated higher.
Trying to get info or help out of this guy is like asking a camel to do-operate in a sand storm and it is worse if you want him to smile, nothing on the planet is funny to him.
Thank god he doesn't know how to use tools because I ain't lending him any.
You have your average guy that plays chess. He has a few beers enjoys the game, might even study an opening or two. He does Judo or has a garage workshop, he knows how to fix the car and weld ,maybe he lifts a bit of weights. He is a friendly,helpful guy but will kill you and bury your mutilated body in the woods or burn something of yours to the ground if you mess with his family.
Then you have the chess nerd. He barely knows how to boil a kettle and only walks barefoot on grass or sand if there is a firing squad forcing him to.He does not know how to use an angle grinder and he is unfit and weak but he knows 15 variations of every imaginable opening and actually reads books on chess.