You can whitelist chess.com in the avg software settings.
AVG Internet Security Blocks Chess.Com

Probably related to the GlobalSign problem
http://www.theregister.co.uk/2016/10/13/globalsigned_off/
Turning off the link scan feature would also likely work until the certificate fix propagates fully.
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I installed AVG Internet Security on my computer. When it is online i can't reach chess.com
Google Chrome's error message: ERR_SSL_PROTOCOL_ERROR
When i disable AVG i can enter chess.com.
I don't have this problem with other websites.
Is there a fix for this so i can enter chess.com and AVG internet security is on.
EDIT: Tried turnin on the program while i'm on chess.com. It seems problem is fixed for now.