book move

plural book moves

1. board gamesAn opening move considered to be the best play; a move in a main line.

   Book move — A standard or conventional move. Not to be confused with a "text move."

   [2022 June 13, Isaac Aronow, “Chess Terms and Vocabulary”, in The New York Times, archived from the original on 17 Jan 2023

   1 more example

   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.

   2020 October 21, Peter Doggers, “Top Chess Players Peak Between 35 and 45, Research Shows”, in Chess.com, archived from the original on 09 Dec 2022