The format of the chess book in Chu-Han Chess was uncertain because the novel did not give a specific name or description of the chess book. However, according to some of the descriptions in the novel, it could be speculated that the Go book might be a document similar to the Go book, which contained the Go game and strategies as well as the author's analysis and opinions. It was also possible that the chess book was a rule book for a card game similar to a chess manual, but this was just a fictional element in the novel.