(Send your Powerbook 2020 code in the comment field at checkout)
Complete opening theory in an all-embracing opening book. That is the Fritz Powerbook 2021. With over 25 million positions including statistics concerning frequency, success rate etc. The Powerbook is the most important supplement to your Fritz program! Ideal for learning and studying your own variations and for practising them.
Also supplied with: a collection of the 1.5 million top level games from which the Powerbook 2021 was constructed as well as the special book “Strongbook”, generated from the strongest grandmaster games (ELO >= 2550) of the last hundred years (over 2 million positions).