public class BattleSimulator
{
    //...
    public Func<List<Turn>, Turn, bool> EvaluationFunction { get; }


    public BattleSimulator(Turn initial,
            Func<List<Turn>,Turn, bool> evaluationFunction)
    {
        Initial = initial;
        EvaluationFunction = evaluationFunction;
        Victories = new List<Turn>();
        Defeats = new List<Turn>();
    }
}