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.
Morsch adapted his Quest program, and ChessBase released it for sale that year as Knightstalker in the U.S. and Fritz throughout the rest of the world.
In 1995, Fritz 3 won the World Computer Chess Championship in Hong Kong, beating an early version of Deep Blue.
In 2004, Fritz 8 added a Handicap and Fun mode, allowing players to choose the Elo rating and style that the engine will use.
On June 23, 2005, in the ABC Times Square studios, the AI Accoona Toolbar, driven by a Fritz 9 prototype, drew against the then FIDE World Champion Rustam Kasimdzhanov.
The 2013 release of Deep Fritz 14 switched engines from the original author Frans Morsch's to Pandix, written by Gyula Horváth.
Fritz 15 was released on November 25, 2015, with new features, including switching to Vasik Rajlich's famous Rybka engine.
[13] In November 2022, a settlement was reached in which it was agreed that the license obligations of the GPL-3.0 for the products Fat Fritz 2 and Houdini 6 have not been complied with.
In the future, Chessbase will comply with the license terms and to adequately inform the public about the use of the Stockfish software in its products.
[14] The American company Viva Media, now a division of Encore, Inc. has been licensed to sell many versions of the Fritz engine and GUI combination.
In 1998, the German company Data Becker released the program 3D Schach Genie, containing the Shredder engine and Fritz interface.