Ok just checked my history and have found some of the pages which i will submit to Chess.
Please be aware of the problems these link might cause of you click them.
Below is a screenshot. The responses they show are bogus.
The URL also changes as you will see from time to time I think they have done this by hijacking some server space somewhere as not to be traced.
http://wayretail.com/?57f611a52fec3998ccc6a901d98e7dc7
I've just had a response from Chess who have told me this:
We’d received reports that this might be happening, and we need just a few more URLS. Our guess at the moment is that the ad group we’re using is cycling in some ads that we do NOT approve of. However, the two reports we had so far turned out to be malware on the reporter’s end (malware can use empty ad space to put up an ad, and be based on the users computer, not the internet).
If you could send me a screenshot of such an ad, I can make sure we either get that removed.
There seems to be some sense in what Chess.com say as Im a BT customer and the adds often refer to and are branded to BT thats what nearly got me however I only ever get the adds when im on the chess site normally after ive been on here some time. The page doesnt appear as a pop up it actually knocks out the chess game im in and replace the url with scam site. There is no cross to come only an accept option - you have to close the page entirely and log back into chess to continue. I will send them images and links as soon as it appears again. Ill post here too so you can be vigilant too.