/// <summary>
/// Add a result to the set.
/// </summary>
/// <param name="winner"></param>
/// <param name="loser"></param>
public void AddResult(Rating winner, Rating loser)
{
var result = new Result(winner, loser);
_results.Add(result);
}
/// <summary>
/// Record a draw between two players and add to the set.
/// </summary>
/// <param name="player1"></param>
/// <param name="player2"></param>
public void AddDraw(Rating player1, Rating player2)
{
var result = new Result(player1, player2, true);
_results.Add(result);
}