Positional sacrifices, improving piece placement, defence in worse positions, prophylaxis, and building and breaking fortresses, are skills every club player needs to master in order to win more games. Junior World Champion Daniel Naroditsky teaches very practical lessons, based on his own experience. Daniel Naroditsky (1995) turns out to be not only a remarkable chess prodigy, but also a born writer and instructor who gives crystal-clear verbal explanations on the essence of positional chess. In a special introduction Daniel's parents tell the story of how their son wrote this book. An astonishing work and an instructive delight.