Fritz (chess)

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Fritz is a German chess program originally developed for Chessbase by Frans Morsch based on his Quest program, ported to DOS, and then Windows by Mathias Feist. With version 13, Morsch retired, and his engine was first replaced by Gyula Horvath's Pandix, and then with Fritz 15, Vasik Rajlich's Rybka.

The latest version of the consumer product is Fritz 18 Neuronal.^[1] This version supports 64-bit hardware and multiprocessing by default.