The Ruy Lopez is one of the most important chess openings, hugely popular with amateurs and masters alike. Black players allowing the Ruy Lopez main lines will usually be condemned to passivity, defending a slightly worse position for as long as White chooses this situation to continue. World Champion Magnus Carlsen doesn't like passivity. He prefers unconventional and active systems that allow him to take command and put pressure on his opponent from early on. That's why Magnus Carlsen has revolutionized the old Møller Attack, one of the sharpest and most uncompromising variations against the Ruy Lopez. As yet largely disregarded and unexplored by the majority of players, Carlsen's new approach allows Black to break free early and start giving White a hard time. FIDE Master Ioannis Simeonidis is the first to cover this system, which he has called it the Neo-Møller, in detail. Simeonidis has made lots of discoveries, presents many new ideas and shows that it is a reliable and playable system. Since the Neo-Møller is a very early deviation from the main lines, it's easy for Black to actually get it on the board and take opponents out of their comfort zone. Simeonidis has created a compact, inspirational and highly accessible guide. One thing looks certain: White players of the Ruy Lopez are going to thoroughly dislike the Neo-Møller!