private bool ScoreExists(string email)
    {
        ClubBAIST   cb     = new ClubBAIST();
        Reservation r      = cb.ReadReservation(int.Parse(Request.QueryString["r"]));
        User        u      = cb.ReadUser(email);
        bool        exists = false;

        if (u.Email != null)
        {
            List <Score> scoresForThisReservation = cb.ReadScoresForReservation(r.ReservationID);
            foreach (Score s in scoresForThisReservation)
            {
                if (s.UserEmail == u.Email || s.UserEmail == r.Player2 || s.UserEmail == r.Player3 || s.UserEmail == r.Player4)
                {
                    exists = true;
                }
            }
        }
        return(exists);
    }