Kotronias: The Modern Spanish: Breyer and Zaitsev SystemsTwo Solid, Strategically Complex Ways to Meet the Spanish! The Breyer and Zaitsev Variations of the Ruy Lopez are two of the most dynamic lines played today. Examining them from both White and Blacks point of view, Greek grandmaster Vassilios Kotronias discusses their strengths, weaknesses and presents suggested improvements where necessary. The Breyer Variation of the Ruy Lopez is the brainchild of Hungarian hypermodern Gyula Breyer. He suggested the