Kaspersky, is very, very good and I would be thinking something else is the problem and that it has nothing to do with us.
I ran norton's web scan over the page and it reported that it was fine:
and also on the sites home page
AVG also reports as safe
Something could have been running in the background on your PC and was trying to connect back to a russian site like a keylogger or virus. Kaspersky should fix anything thats wrong maybe do a full system scan using Kaspersky and make sure everything is ok.
If it happens again take a print screen and document what you see happening (is it when the score submits or random play)
But yeah I highly, highly doubt it is anything related to us.
We get russian bots on the site that sometimes post links in blogs or in their signature however most of them are blocked, we have never been attacked by them though and it is highly unlikely that they would bother with a rare fan site that makes no money and holds no user information.