In a carefully worded statement like this (clearly it has been reviewed by legal council) you will say things that cannot be charged as defamation in the appropriate courts.

It's also a gambit to get Hans to say something like "sure, Carlsen, say whatever you want" which could be used as a defense in a defamation case.

There's even a hint that Carlsen has evidence of cheating that has yet to be revealed (but not this game).