Interview Screening Question

I received the following test as a screening step to a potential Software Engineer position. I thought it was pretty good compared to the type and nature of screenings you usually get in the Tampa Bay market.

Here it goes:

Implement the missing class without modifying the provided classes.
The correct output should be:
Local Boys = 6 (Home)
Tourists = 0 (Away)

 

using System;

namespace Test {
    public class FootballTeam : Team {
        public FootballTeam(string name, FieldAdvantage side)
            : base(name, side) {
        }

        public override int NumPlayers {
            get {
                return 11;
            }
        }

        public void Touchdown() {
            Score += 6;
        }
    }

    public class Game {
        public FootballTeam Home = new FootballTeam("Local Boys", Team.FieldAdvantage.Home);
        public FootballTeam Away = new FootballTeam("Tourists", Team.FieldAdvantage.Away);

        public static void Main() {
            Game game = new Game();
            Referee referee = new Referee(game);
            game.Home.Touchdown();
            game.Away.Touchdown();
            game.Home.Score += 100;
            Console.WriteLine("{0} = {1} ({2})", game.Home, game.Home.Score, game.Home.Side.ToString());
            Console.WriteLine("{0} = {1} ({2})", game.Away, game.Away.Score, game.Away.Side.ToString());
        }
    }

    public class Referee {
        public Referee(Game game) {
            game.Home.ScoreChange += new Team.ScoreChangeEventHandler(OnScoreChange);
            game.Away.ScoreChange += new Team.ScoreChangeEventHandler(OnScoreChange);
        }

        private void OnScoreChange(Team.FieldAdvantage side, int newScore, ref bool overrule) {
            if ((side == Team.FieldAdvantage.Away) || (newScore > 100))
                overrule = true;
        }
    }
}

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