官子谱
Large classic Chinese problem collection (over 1000 problems) in circulation from the sixteenth century onwards. First author/editor Guo Bailing. Published in 1660; again edited and published 1689 by Tao Shiyu.
The name implies endgame problems, and the collection has many examples of a relatively unusual type of question: not orthodox life and death, but ways to attack a group that will live with best play, but at the cost of points. The collection expanded to include many types of question - effectively any way of exploiting bad shape.