enum Color: String {
    case white = "белый"
    case black = "черный"
}

enum ChessFigures: String {
    case king = "король"
    case queen = "королева"
    case bishop = "слон"
    case knight = "конь"
    case rook = "ладья"
    case pawn = "пешка"
}

struct Chessmen {
    var chessFigure: ChessFigures
    var color: Color
    var coordinates: (Character, UInt)? = nil

    mutating func setCoordinates(char: Character, num: UInt) {
        self.coordinates = setCoordinates
    }

    init(chessFigure: ChessFigures, color: Color) {
        self.chessFigure = chessFigure
        self.color = color
       }
}

var whiteKing = Chessmen(chessFigure: .king, color: .white)
whiteKing.coordinates = ("A",4)
whiteKing.coordinates