If you’re using an older iPhone or iPad and wondering why the Chess.com app isn’t working, it’s nothing to do with iOS 11: it’s because the total game counter has hit the magic number of 2,147,483,647 …
This is the maximum value for a 32-bit integer, so 32-bit devices can’t cope with the fact that the app now needs to display a higher number of games.
The developer says that it plans to have a fix out within 48 hours, and that players can use the web version in the meantime to continue their games. 64-bit devices are also unaffected, meaning the iPhone 5S and up, and the iPad Air and later.
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