Maybe it means... pawn takes Knight ?
Weird Notation

As others have said, this is descriptive notation. IMHO, it is more difficult to read than algebraic notation, since the black side is written from the black side's perspective, but not impossible.
Herei is a converter.
http://marianogappa.github.io/ostinato-examples/convert.html

It looks hard to me but certainly learnable.

Herei is a converter.
http://marianogappa.github.io/ostinato-examples/convert.html
Thanks bino mine. More cool apps or software that you can recommend?
I was reading a chess book when they were using a weird kind of notation like p-xkn I'm very puzzled.