A position with the only legal move resulting in checkmate Theoretically, is it possible that for some position, the only legal move for a side leads to a checkmate (that is, the opposite king gets checkmated)? If so, has this ever occurred in a real game?
I want to offer a semi-realistic example. I think I have seen something like this in a game by masters in some book, but of course I cannot recall where. But this is something that at least can be realistically missed in calculations from far away.
[FEN &quot;6k1/5ppp/6r1/3b4/4r3/8/1Q5P/1R5K w - - 0 1&quot;]

White just gives a back rank mate, right? :)
Update: actually, I found a real game with a very similar motive, though not quite self-mate in one:
[FEN &quot;&quot;]
[Event &quot;Simul&quot;]
[Site &quot;Copenhagen DEN&quot;]
[Date &quot;1924.03.15&quot;]
[EventDate &quot;?&quot;]
[Round &quot;?&quot;]
[Result &quot;1-0&quot;]
[White &quot;Aron Nimzowitsch&quot;]
[Black &quot;Paulsen&quot;]
[ECO &quot;D32&quot;]
[WhiteElo &quot;?&quot;]
[BlackElo &quot;?&quot;]
[Source &quot;Skjoldager and Nielsen pp.399-400&quot;]
[PlyCount &quot;43&quot;]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. a3 cxd4
7. exd4 Be7 8. c5 O-O 9. Bd3 a6 10. O-O Qc7 11. b4 e5 12. dxe5
Nxe5 13. Nxe5 Qxe5 14. Bb2 Ng4 15. f4 Qd4+ 16. Kh1 Nf2+
17. Rxf2 Qxf2 18. Nxd5 Qxb2 19. Bxh7+ Kh8 20. Qh5 Qxa1+ (20...Bg4!)
21. Bb1+ Kg8 22. Nxe7# 1-0

An old Russian book by Judovich also lists the following position in a game between two amateurs &quot;whitnessed by J. Krejcik in a local club&quot;:
 [Fen &quot;8/4N1p1/7k/4B2P/5KP1/3q4/8/7R b - - 0 1&quot;]

The story goes that after 1...g5, both players resigned, because white forgot about the en passant rule, and black only remembered it after they made the move. I think we can safely assume it's made up, though.