{
  "id": "checkmate.other-set",
  "term": "checkmate",
  "sense": "other-set",
  "pos": "noun",
  "status": "published",
  "level": 15,
  "domain": "agency",
  "style": "window",
  "definition": "Walls set by another so that no action within its reach keeps a thing inside its window; the window ends while the thing persists.",
  "folk_gloss": null,
  "emergence": {
    "components": [
      "wall.range-end",
      "set.fix",
      "action.deed",
      "reach.action",
      "keep.maintenance",
      "inside.spatial",
      "window.range",
      "change.process",
      "persist.continue",
      "power.over",
      "model.representation",
      "time.dimension"
    ],
    "interaction": "The opponent's pieces set walls on each square the king could go to and on the one it stands on; a model of the position lists each action and finds each outside the window. The game ends on that reading, and the king is never taken.",
    "novel_properties": [
      "an end read from the model before it happens",
      "a loss in which no part is removed",
      "power that works by closing each exit at the same time"
    ]
  },
  "examples": [
    {
      "text": "A chess game ends at checkmate: the king is attacked and no legal move removes the attack, and the king itself is never captured.",
      "domain": "chess"
    }
  ],
  "relations": [
    {
      "id": "smothered-mate.self-set",
      "type": "contrasts-with",
      "note": "SETTER other vs self: in smothered mate the closing walls are the king's own pieces"
    },
    {
      "id": "zugzwang.forced",
      "type": "contrasts-with",
      "note": "checkmate: no action stays inside the window; zugzwang: actions stay inside, each one worse"
    },
    {
      "id": "doomed.inevitable",
      "type": "contrasts-with",
      "note": "doomed: drift reaches the wall later; checkmate: each path already crosses it, so the end is declared now"
    }
  ],
  "used_by": [
    "smothered-mate.self-set"
  ],
  "forms": [
    "checkmate",
    "checkmated",
    "checkmates",
    "checkmating"
  ],
  "closed": true,
  "provenance": {
    "author": "claude-opus-5-5:hand-curated",
    "date": "2026-09-28",
    "confidence": 0.85,
    "sources": [
      "schema/power-agency-phase.md"
    ]
  },
  "canonical": "https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-checkmate.other-set"
}