"book move" meaning in English

{
  "forms": [
    {
      "form": "book moves",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "book move (plural book moves)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Chess",
          "orig": "en:Chess",
          "parents": [
            "Board games",
            "Tabletop games",
            "Games",
            "Recreation",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2020 October 21, Peter Doggers, “Top Chess Players Peak Between 35 and 45, Research Shows”, in Chess.com, archived from the original on 2022-12-09:",
          "text": "The researchers only considered the phase between move 10 and move 100 to rule out most of the \"book moves\" and didn't consider games that lasted fewer than 20 moves.",
          "type": "quote"
        },
        {
          "ref": "[2022 June 13, Isaac Aronow, “Chess Terms and Vocabulary”, in The New York Times, archived from the original on 2023-01-17:",
          "text": "Book move — A standard or conventional move. Not to be confused with a \"text move.\"",
          "type": "quote"
        }
      ],
      "glosses": [
        "An opening move considered to be the best play; a move in a main line."
      ],
      "id": "en-book_move-en-noun-ySaAL1zh",
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "opening",
          "opening"
        ],
        [
          "move",
          "move"
        ],
        [
          "best",
          "best"
        ],
        [
          "play",
          "play"
        ],
        [
          "main line",
          "main line"
        ]
      ],
      "raw_glosses": [
        "(chess) An opening move considered to be the best play; a move in a main line."
      ],
      "related": [
        {
          "word": "outbook"
        }
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "book move"
}

{
  "forms": [
    {
      "form": "book moves",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "book move (plural book moves)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "outbook"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Chess"
      ],
      "examples": [
        {
          "ref": "2020 October 21, Peter Doggers, “Top Chess Players Peak Between 35 and 45, Research Shows”, in Chess.com, archived from the original on 2022-12-09:",
          "text": "The researchers only considered the phase between move 10 and move 100 to rule out most of the \"book moves\" and didn't consider games that lasted fewer than 20 moves.",
          "type": "quote"
        },
        {
          "ref": "[2022 June 13, Isaac Aronow, “Chess Terms and Vocabulary”, in The New York Times, archived from the original on 2023-01-17:",
          "text": "Book move — A standard or conventional move. Not to be confused with a \"text move.\"",
          "type": "quote"
        }
      ],
      "glosses": [
        "An opening move considered to be the best play; a move in a main line."
      ],
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "opening",
          "opening"
        ],
        [
          "move",
          "move"
        ],
        [
          "best",
          "best"
        ],
        [
          "play",
          "play"
        ],
        [
          "main line",
          "main line"
        ]
      ],
      "raw_glosses": [
        "(chess) An opening move considered to be the best play; a move in a main line."
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "book move"
}