private static void RemoveSoldier(IAttackable king, ISoldier soldier, IEnumerable <ISoldier> soldiers)
        {
            soldier.TakeAttack();

            if (soldier.HitsToDie == 0)
            {
                king.UnderAttack -= soldier.OnAttackKing;

                soldiers = soldiers.Where(s => s.Name != soldier.Name);
            }
        }