Here, Chekhov gives us an opportunity to reconsider the scary term “structure.”
We might think of structure as simply: an organizational scheme that allows the story to answer a question it has caused its reader to ask.
Me, at the end of the first page: “Poor Marya. I already sort of care about her. How did she get here?”
Story, in the first paragraph of its second page: “Well, she had some bad luck.”
We might imagine structure as a form of call-and-response. A question arises organically from the story and then the story, very considerately, answers it. If we want to make good structure, we just have to be aware of what question we are causing the reader to ask, then answer that question.