I encountered a Shogi saying: 三桂あって詰まぬこと無し And I'm pretty confused about the ぬ there. If it was る I'd expect the meaning to be something like: "If you have 3 knights, you can't be mated" But ...
I have come across a conjugation of 死ぬ verb which I've never heard before. It is 死ぬる, I have heard it in a TV show, you can see the relevant part in this video. Is this a depreciated form? If so, ...