grey area

I have a span about 3 - 4 inches on either side of the webpage while I am on chess.com that is just grey. it is like the page is not fitting into the browser completely. it does it on every page of chess.com but not on any other sites. I know I have seen the whole thing fit into the browser before but i can't figure out how to get it right again. if anyone can help please do.

Post a screenshot (resize using Paint or similar).

I think it is supposed to be like that. Mine is at least. Is the logo in the grey at the top, and a bunch of web links at the bottom in the grey area. 
If som I think that is normal. 

it is because your screen resultion is set higher than the webpage's.  you can zoom your browser in to make if fit, although you may still have some grey. 

the chess.com logo is in grey but I know i have had it fit completely before, was thinking maybe i screwed up a setting or something

Hold down Ctrl and roll mouse wheel.