The latest versions of the consumer products are Deep Fritz 13 and Fritz 13.
Morsch and his friend Ed Schröder produced a chess program in the early 1980s. In the early 1990s, the German company ChessBase asked Morsch to write the Fritz chess programs (called Knightstalker in the USA). In 1995, Fritz 3 won the World Computer Chess Championship in Hong Kong, surprisingly beating a prototype version of Deep Blue.
From 25 November to 5 December 2006 Deep Fritz played a six-game match against Kramnik in Bonn. Fritz was able to win 4–2. In this match, Kramnik blundered away game 2, allowing a mate in one.
On the September 2010 SSDF rating list, Deep Fritz 12 placed sixth with a rating of 3110, 135 points higher than Deep Junior 10.1, and 103 points lower than No. 1 ranked Deep Rybka 3 x64. Deep Fritz 11 is eighth on the same list, with a rating of 3073.
On the December 2010 edition of the CCRL rating list, Deep Fritz 12 placed sixth with an Elo rating of 3088, 29 points higher than Deep Junior 11.1a x64, and 174 points lower than No. 1 ranked Deep Rybka 4 x64. Deep Fritz 11 is also sixth on the same list, with a rating of 3097
Version history 
|Version||Year of release||Platforms||New features|
|Fritz 6||2000||Windows||revised graphics, improved menu|
|Fritz 7||2001||Windows||online play, highscore lists, chat functions, watch other people play|
|Fritz 8||2003||Windows||photo-realistic virtual 3D boards that zoom and tilt, 500,000+ games database including historical matches between the world chess champions Bobby Fisher and Boris Spassky, Napoleon versus The Chess Automaton|
|Fritz 9||2005||Windows||new preset AI opponents, handicap, realistic sound effects for the various types of chess pieces, several new 3D enhanced playing boards, board customization|
|Fritz 12||2009||Windows||Redesigned Ribbon interface, new Fritz 12 engine, openings book by Alex Kure, 12 hours chess tutorial videos with international trainers and world class players, updated database of 1.5 million games from 1625 to 2009|
|Fritz 13||2011||Windows||“Let’s Check” online knowledge base for chess, Application Menu Button changed to File Menu button|
|Deep Fritz 13||2012||Windows||Deep Fritz 13 includes everything that the single core version (Fritz 13) does. The difference is that the deep version can use 2 or more cpu cores to analyze the game much faster. According to the manufacture the deep version is 60% faster on a dual-core machine compared to single core version. Deep Fritz 13 also includes a new feature called "the chessbase engine cloud". The feature makes use of the cloud technology and lets users use engines that are running on other people's computers and use them to do position analyses, blunder searches, engine matches, etc.|
Fritz and Chesster 
|Fritz and Chesster|
|Mode(s)||Single-player, 2 players in Fritz and Chesster 2 and 3 after playing King Black|
Fritz and Chesster is a series of introductory chess programs based on the Fritz engine. Each program provides basic tutorials and games based around one aspect of chess, allowing children to learn the basic rules easily without overwhelming them with too many options at once.
Games are based around Prince Fritz, the son of King White, and his cousin Bianca, as Chesster the rat (among others) teaches them the fundamentals of chess so that they can defeat King Black.
There are three programs available in the series:
- Learn To Play Chess With Fritz and Chesster covers all the rules of chess, from basic moves to castling and stalemate.
- Learn To Play Chess With Fritz and Chesster 2: Chess in the Black Castle covers chess strategy and tactics, chess openings, and endgames.
- Learn To Play Chess With Fritz and Chesster, part 3: Chess for Winners contains opening schemes, tactics, recognizing checkmates, endgame training, and key squares.
See also 
- Anti-computer tactics
- Brains in Bahrain
- Chess engine
- Computer chess
- IBM Deep Blue
- List of chess software
- Pocket Fritz
- "Chess champion loses to computer". BBC News. December 5, 2006. Retrieved 2008-05-04.
- "New chess duel Man vs Machine", Chessbase, 3 January 2006
- "Kramnik vs Deep Fritz: Computer wins match by 4:2", Chessbase, 5 December 2006
- Susan Polgar: Blunder of the century? Biggest blunder ever?
- http://www.mobygames.com/game/fritz-6 Fritz 6 on mobygames
- http://www.mobygames.com/game/fritz-7 Fritz 7 on mobygames
- http://www.mobygames.com/game/fritz-8 Fritz 8 on mobygames
- http://www.mobygames.com/game/fritz-9-play-chess Fritz 9 on mobygames
- http://www.chessbase.com/shop/product.asp?pid=467&user=&coin= Fritz 12 on ChessBase