yup
Checkmate By King

I remember the Lasker v. Thomas example. The checkmate would have been even prettier if Lasker had chosen 18. O-O-O# instead of 18. Kd2#.

what we're posting are games where the king delivers checkmate (executing the mating move).
The OP's question is, precisely: "Can a king checkmate a king...?"
Duh!!!

which is obviously not the case for which reason we decided to move on to this topic.
feel free to participate or else please piss into someone else's pool."
Fool

Horrid choice of pieces!
Now, all these are just examples of discovered attacks, in which the K played a role. And post #21 is illegal.

You CAN'T checkmate by a K. These are both checkmate by R. Duh.
No it's not. Did the rook move?
Can a king checkmate a king (I already know the answer)?