Module fen 

Forsyth-Edwards Notation, a standard notation for describing a chess position.

Wikipedia FEN
Chess Programming FEN\

Example:
Starting Chess FEN = “rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1”

Enums

ParseFenError

Traits

Fen

Implement Fen for any types which can be fully parsed from a FEN string.

FenComponent

Allows converting data that can be represented as a FEN sub-string to and from &str.