Maybe, it's difficult to tell. Facebook isn't exactly known for its security, but there are also other variables to consider here. You could have malware on your system that has been sniffing passwords, and that's how they got the password there. Or it could just even be a simple, innocuous matter of the poker game data having been reset. I tend to avoid Facebook, so I don't know if they have any particular review process of things before people can access them via their website, but the app itself could have been malicious. Or depending on how the app stores data, maybe the number of chips you had was stored in a cookie file, and you deleted all your cookies.
There's a large range of possibilities to explain what happened that run anywhere from very simple and innocuous to intentionally malicious, so it seems a bit hasty to jump right to the conclusion that someone hacked your account.
I have an account on facebook, besides networking i use to play poker with it. It is quite obvious that it has been hacked as all my chips disappeared by itself. My account has a Sixteen character password, made up of randomly selected letter and symbols and my email asociated with the account has an equally strong password.
So my question is if my account is hacked does it mean that my pc is compromised too? any suggestion on how to prevent any further attempts to hacked my account would be greatly appreciated.