<<shudder>> Stupid friggin' Game Center has made Chess unplayable on my MacBook. As soon as I open Chess, GC auto-opens. But even worse, once I close it, a couple seconds later it forces itself to re-open! I don't want to connect to this stupid platform, and I just want to play offline. Not to mention that I don't even have an Internet connection most of the time anyway. Someone, please, tell me how I can give Game Center the horrible death it deserves. Thank you.