The term does not refer to an official product released by ChessBase. Instead, it describes a modified or repackaged version of the original Fritz 11 software that can be run from a portable storage device (like a USB stick) without being installed on the host computer's hard drive or Windows registry.
was a significant rewrite of the popular chess program released by ChessBase in 2007. While there is no official "portable" standalone version, the software is known for its deep analysis tools and training features that can be used on laptops meeting its system requirements. Key Features of Fritz 11 fritz 11 portable