Only an idiot can deliver a king move checkmate..
Has a king move ever delivered checkmate (in a serious game?)

Good question! And there you go. A well known instance of a king move delivering checkmate, and I don't think many of us here would consider Lasker an idiot. Personally when I first saw this I thought delivering mate with 0-0-0 (queenside castling) was more elegant and aesthetically pleasing, but who am I to be quibbling with Lasker? Nice queen sacrifice as well. Enjoy, Ubzugabir.

That's such a great game. You really have to have some faith in your ability to see the line to drop a queen in that way.

Good question! And there you go. A well known instance of a king move delivering checkmate, and I don't think many of us here would consider Lasker an idiot. Personally when I first saw this I thought delivering mate with 0-0-0 (queenside castling) was more elegant and aesthetically pleasing, but who am I to be quibbling with Lasker? Nice queen sacrifice as well. Enjoy, Ubzugabir.
great game--wonderful queen sacrifice

By the way, in his memoirs Lasker noted that when he was asked why he had finished his game with Thomas with 18 Kd2# instead of 18 O-O-O#, he would say that he was aware of a Morphy game that had finished with castling long delivering checkmate, and deliberately chose Kd2 instead.

And I thought the bishop manouevre Be2 and then Bh5 instead of the superficially simpler Qh5 demonstrated real tactical sophistication.

And don't forget that well known 9 move Classic !!!
I'd hate to fall for this.. hate..hate...hate. (that is my OTB fear). I think I would have thought there was something up by move 3 with Ke3. I probably would have played 4...d6 to get my queen out.
If you need help, please contact our Help and Support team.
Has a king move ever delivered checkmate (in a serious game?)