static const char * type2str(const Type & t);
static Piece * AddPiece(std::vector<Piece*> & v, int x, int y, const Colour & colour, const Type & type1, const Type & type2, int type_index=-1);
static const char * type2str(const Type & t);
static Piece * AddPiece(std::vector<Piece*> & v, int x, int y, const Colour & colour, const Type & type1, const Type & type2, int type_index=-1);