The Modern Spanish: Breyer and Zaitsev Systems by Vassilios KotroniasPaperback, 352 pages, Russell EnterprisesRussell Enterprises 2020 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