What setup-and-payoff technique, limits and failure modes follow from the four Russian records of Chekhov's "gun" remark (letter, Gurlyand, Nemirovich-Danchenko, Shchukin)?

The four records point at four different jobs for the same image: policing a promise to the spectator (letter), keeping a first-act prop to the last act (Gurlyand), cashing an act-ending "loaded gun" in the next act instead of withdrawing it in the interval (Nemirovich-Danchenko on The Seagull), and ruthless editing of a beginner's story (Shchukin). Together they yield a promise audit and a hook-payoff check, with a narrow reading of the limit: they say planted things must be paid, and none of the passages read says every payoff needs a plant. Red herrings and over-signposting are not discussed in any passage read. Curator qualifications: Excerpt check with correct KOI8-R decoding: all S11-02/-03 excerpts found verbatim, incl. Shchukin 'если вы говорите в первой главе, что на стене висит ружье, во второй или третьей главе оно должно непременно выстрелить' and Nemirovich-Danchenko 'публика же любит, чтобы в конце акта перед нею поставили заряженное ружье' / 'но надо, чтоб потом оно выстрелило, а не было просто убрано в антракте'. Wikipedia: 'recorded, with some variation, in several letters by Anton Chekhov'; '"One must never place a loaded rifle on the stage if it isn't going to go off. It's wrong to make promises you don't mean to keep."'; Shchukin rendered as 'If you say in the first act that there is a rifle hanging on the wall'. Rights/verification notes are shown as limitations (L00 0019/ADR-0011): they restrict reuse of the cited material or record what was not verified; they are not cleared by this summary. Limitations: [component_reuse_restriction] Rights hold on 20th-century editorial commentary and reminiscence editions (producer). Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "http://www.lib.ru/LITRA/CHEHOW/vosp.txt",
      "note": "ru.wikisource oldid 5658775; lib.ru LITRA/CHEHOW/vosp.txt (KOI8-R); en.wikipedia Chekhov's gun (fetched 2026-10-22)"
    },
    {
      "url": "https://ru.wikisource.org/wiki/%D0%9F%D0%B8%D1%81%D1%8C%D0%BC%D0%B0._(%D0%9E%D0%BA%D1%82%D1%8F%D0%B1%D1%80%D1%8C_1888_-_%D0%B4%D0%B5%D0%BA%D0%B0%D0%B1%D1%80%D1%8C_1889)_(%D0%A7%D0%B5%D1%85%D0%BE%D0%B2)",
      "note": "ru.wikisource oldid 5658775; lib.ru LITRA/CHEHOW/vosp.txt (KOI8-R); en.wikipedia Chekhov's gun (fetched 2026-10-22)"
    },
    {
      "url": "https://www.gutenberg.org/cache/epub/1756/pg1756.txt",
      "note": "ru.wikisource oldid 5658775; lib.ru LITRA/CHEHOW/vosp.txt (KOI8-R); en.wikipedia Chekhov's gun (fetched 2026-10-22)"
    }
  ]
}