The Ruy Lopez Powerbook 2023 is a comprehensive special book with which you can check your opening lines and set out on a search for promising additions to your repertoire. For this new edition of the Ruy Lopez Powerbook 2023 once again only games from the engine room of playcess.com were used. The enormous total of 2.71 million Ruy Lopez games allows for meaningful statistical analyses not only for the main lines but also for numerous side variations. A must for all Ruy Lopez players! The Ruy Lopez Powerbook 2023 is an opening book which you can use with your Fritz or ChessBase program. It does not contain a database – i.e. no games are supplied with it.