public void CalculateLastOccupierAvailableMoves()
{
chessGame.board.RemoveHighlightedCoordinates();
lastSelectedOccupierAvailableMoves = chessGame.CalculateAvailableMoves(lastSelectedOccupier);
chessGame.board.HighlightCoordinates(lastSelectedOccupierAvailableMoves.ToArray());
}