This book examines what might be described as the “pure” Reti Opening. White starts with 1 Nf3 and intends to meet 1...d5 with the “Reti” response 2 c4. One of the major advantages of playing these systems is that they rely far more on general strategic understanding than rote memorisation. However, this does not mean that Black is not set difficult problems to solve. In the modern era these lines have mainly been championed by Vladimir Kramnik and Lev Aronian. Both these players have frequently set very difficult problems for their elite opponents with these complex systems.