... In addition the DVD has a small but very exclusive book with the strongest GM games (ELO >= 2550) from the past 100 years (2 Mio positions). System requirements: Pentium PC, 32 MB RAM, Windows Vista, WindowsXP, Windows 7 and Fritz12 or 13, DVD drive. Im Shop kaufen: http://www.topschach.de/fritz-powerbook-2013-p-2438.html