in book
English
editPrepositional phrase
edit- (chess, uncommon) Of a chess player: following a main line ("a standard sequence of opening moves considered to be best play").
- Antonym: out of book
- 2022 January 21, Colin McGourty, “Tata Steel 5: Rapport & Mamedyarov hit the front”, in chess24[1], archived from the original on 2022-05-19:
- The Sicilian opening was wild, but the speed of play made it clear both players were "in book", up to a point.
- 2023 January 19, Mark Crowther, “Giri overtakes Abdusattorov in a dramatic final round of the Tata Steel Masters to grab his first title”, in The Week in Chess[2], archived from the original on 2023-02-01:
- Wesley So had prepared a line with a temporary pawn sacrifice against Praggnanandhaa and both players appeared to be in book for a long time.