Chessbase Chess Software
Contains 21 Million Opening Positions, Derived from 1.7 Million High Class Tournament Games
The Fritz Powerbook 2020 contains 21 millions opening positions, derived from 1.7 million high class tournament games. Together with each position all relevant information is stored: all moves that were played in the position, by players of what average rating, with what success and performance results.
Fritz Powerbook 2020