From the cover: The Spanish grandmaster and coach Jesus de la Villa has proven with his best-seller 100 Endgames You Must Know that he understands exactly what a chess student needs. Building on his experience as a writer and as a coach for juniors, he has carefully selected the 50 Mistakes every player should be aware of – so the mistake can be avoided. Your performance will improve dramatically because this book offers you: 50 important chess lessons; detailed and lively explanations; clear summaries and recommendations; dozens of tests. Further information about the book and a sample are available at newinchess.com