Bookup is the world's only positional chess database, available for Windows 98/ME/XP/2000/NT.

Bookup has been described as a chess book that "comes to life on the screen." The most common application is quick research and training in chess opening theory.

In contrast to game databases, Bookup stores each position and finds any transposition (regardless of move order) instantly. This feature makes Bookup ideal for keeping track of opening th