Discovering Chess Openings - John EmmsPaperback, 192 pages, Everyman Chess In Discovering Chess Openings John Emms argues that studying openings doesn't have to be hard work it can be both enjoyable and enlightening. The key to successful opening play is not simply learning lines off by heart; instead it's the understanding of the basic principles, and here the reader is guided through the vital themes: swift development, central control and king safety.