ChessBase

ChessBase is a German chess-technology company based in Hamburg. Its business combines specialist software, digital chess databases, engine-based analysis, training media, online play, and chess journalism. The company is best known for ChessBase, a database and analysis environment used by chess professionals, coaches, tournament players, and enthusiasts, and for Fritz, a family of chess-playing programs and graphical interfaces. The company grew out of Computer-schach und Spiele, a magazine founded by Frederic Friedel and colleagues during the early 1980s, when computer chess was becoming an established hobby. After a conversation with world champion Garry Kasparov in 1985, Friedel became interested in the possibility of a searchable computer database of recorded games that could assist players with opening preparation and opponent research. Physicist and programmer Matthias Wüllenweber developed the first ChessBase database application for the Atari ST. The product was introduced publicly in the February 1987 issue of Computer-schach und Spiele, together with the first ChessBase Magazine disk. ChessBase differentiated itself by treating chess information as a structured data product rather than merely as a collection of printed books or standalone playing programs. Its database tools allow users to store, search, annotate, classify, and analyze games. Search functions can cover players, openings, positions, tactical and strategic motifs, material configurations, and other features. The software uses a proprietary ChessBase format while also supporting Portable Game Notation and external chess engines. Its products have incorporated both internally distributed engines and engines supplied by independent developers. The company's software portfolio expanded significantly in the 1990s. Fritz, initially developed by Dutch programmer Frans Morsch and later ported for ChessBase by Mathias Feist, gave the company a major consumer-facing playing product. In the United States it was initially marketed as Knightstalker, while the Fritz name was used in other markets. ChessBase subsequently added or distributed engines including Hiarcs, Junior, Nimzo, Shredder, Zappa, Rybka, Houdini, and Komodo in various periods. The Fritz graphical environment also became a platform for features such as adjustable playing strength, engine analysis, cloud engines, and online access. ChessBase broadened beyond software sales through training and media. It published ChessBase Magazine and produced CD-ROMs, DVDs, and later digital training materials covering openings, tactics, endgames, famous players, and instructional video. The Chess Media System, introduced in 2003, synchronized video instruction with moves displayed on an electronic chessboard. Grandmasters and world champions, including Garry Kasparov, Viswanathan Anand, Vladimir Kramnik, and Rustam Kasimdzhanov, contributed to training content, while other grandmasters created opening and instructional series. The company's online activities include Playchess, an internet chess service for games, discussion, lectures, interviews, and chess variants; an online game database; web-based tactics training; and web applications for playing Fritz and storing personal games. ChessBase News provides chess reporting, tournament coverage, interviews, product information, and instructional material in several languages. Regional operations and media channels extend the brand's reach, including ChessBaseUSA and ChessBase India. ChessBase India has developed a particularly large video audience, with more than 2.5 million YouTube subscribers and more than 2.5 billion total views reported as of December 2024. ChessBase has also faced scrutiny over software licensing and attribution. Developers of Stockfish alleged that Fat Fritz 2 incorporated GPL-licensed Stockfish code without adequate compliance and criticized the product's presentation. ChessBase added references and argued that the product included a…

ChessBase originated in the early computer-chess community surrounding Computer-schach und Spiele, a magazine associated with Frederic Friedel and his colleagues from 1983 onward. In 1985, Friedel spoke with world champion Garry Kasparov, who suggested that a searchable database of prior games could make preparation against particular opponents much easier. Friedel then worked with Bonn physicist Matthias Wüllenweber, who created the first ChessBase database program for the Atari ST. The product, known as ChessBase 1.0, was presented in the February 1987 issue of Computer-schach und Spiele, alongside a ChessBase Magazine disk containing edited games. The company soon moved from database software into computer chess. In 1991, it announced that Frans Morsch's chess program would be sold for personal computers. The product was initially called Knightstalker in the United States and Fritz in other markets. Mathias Feist helped port the program to MS-DOS and Windows. Fritz became one of the company's principal consumer brands and later served as a graphical environment for multiple engines. Fritz 5, released in 1998, included a friend mode that adjusted the program's playing strength to the user's assessed level, a concept that continued in later interfaces. During the 1990s, ChessBase expanded its editorial and training activities. Grandmaster Rainer Knaak joined the company in 1994 and prepared annotated material for ChessBase Magazine and game-database products. Grandmaster Daniel King was another early contributor to instructional CD-ROMs, which developed into the FritzTrainer multimedia series. ChessBase-related publishing also included opening books and other instructional works distributed through partners in the United States. The software portfolio became an aggregation point for prominent chess engines. Hiarcs 6 was added to the Fritz interface in 1996, followed by Junior and Nimzo in 1998. In 1999, after Shredder won the World Computer Chess Championship, ChessBase hired its developer Stefan Meyer-Kahlen and distributed Shredder through a Fritz-style interface. The company also released collections and products involving other engines, including Zappa, Chess Tiger, Gambit Tiger, Rybka, Houdini, and Komodo. Its interfaces gained support for external Universal Chess Interface engines, allowing users to work with a broader engine ecosystem. ChessBase placed its game database online in 1998 and began offering more grandmaster-authored training material. In 2003, it introduced the Chess Media System, which linked instructional video with moves shown on an electronic board. The company commissioned or distributed courses featuring leading players such as Garry Kasparov, Viswanathan Anand, Vladimir Kramnik, and Rustam Kasimdzhanov. It also developed opening and general instructional series, including FritzTrainer and Daniel King's Power Play materials. ChessBase's online presence grew through Playchess, a commercial internet chess service offering games, discussion, lectures, interviews, and variants. The service was distributed through ChessBase playing products and also offered a downloadable client. It used an internal currency called Ducats for selected services. By 2011, the service was described as having tens of thousands of online players, including titled players. ChessBase later added web access to Playchess and introduced browser-based tactics training, online Fritz play, and personal game storage during the 2010s. The company also operates ChessBase News, a multilingual chess-news and product-information site. Its regional presence includes ChessBaseUSA and ChessBase India. ChessBase India, operated by International Master Sagar Shah and Amruta Mokal, became a significant video and reporting outlet for Indian and international chess audiences. By December 2024, it was reported to have more than 2.5 million YouTube subscribers and more than 2.5 billion views. A major controversy concerned Fat Fritz 2, an engine product criticized by Stockfish developers and Lichess for allegedly incorporating Stockfish code and presenting insufficient acknowledgment of its open-source origins. ChessBase added references and maintained that the product differed because of additional neural-network contributions, while critics challenged that explanation and linked the network lineage to other open-source projects. Stockfish developers sued ChessBase in July 2021, alleging violation of the GNU General Public License. The parties reached a settlement in November 2022. The episode remains an important part of ChessBase's corporate and product history because it highlighted licensing, attribution, and openness issues in commercial chess-engine distribution.

1. 2024ChessBase India reaches a large video audience

   ChessBase India was reported to have passed 2.5 million YouTube subscribers and 2.5 billion total views by December.

   Source
2. 2022Fat Fritz 2 dispute is settled

   ChessBase and the Stockfish developers reached a settlement over the licensing controversy.

   Source
3. 2021Stockfish litigation begins

   Stockfish developers filed a lawsuit alleging that ChessBase breached licensing obligations in connection with Fat Fritz 2.

   Source
4. 2015ChessBase expands its web applications

   The company introduced browser-based tactics training, a web version of Play Fritz, and My Games for online game storage.

   Source
5. 2013Playchess receives a web interface

   The company's online chess service became accessible through a web interface in addition to its dedicated software.

   Source
6. 2003Chess Media System launches

   ChessBase introduced synchronized video-and-board instruction, enabling multimedia courses in which spoken lessons and played moves appeared together.

   Source
7. 1999Shredder joins the ChessBase engine portfolio

   Following Shredder's computer-chess championship success, ChessBase hired its developer and distributed the engine through its graphical interface.

   Source
8. 1998The ChessBase game database goes online

   ChessBase extended its database offering to the internet and expanded grandmaster-authored training products.

   Source
9. 1991Fritz is announced for personal computers

   Frans Morsch's chess program entered ChessBase's product portfolio, initially using the Knightstalker name in the United States.

   Source
10. 1987ChessBase 1.0 and ChessBase Magazine are introduced

    The Atari ST database and an accompanying game magazine disk were presented to the chess public.

    Source
11. 1986ChessBase is founded

    The German chess-software company was founded around the database work of Friedel and Wüllenweber.

    Source
12. 1985Kasparov discussion inspires a chess database

    A conversation between Friedel and world champion Garry Kasparov helped motivate the development of a searchable database for chess preparation.

    Source
13. 1983Computer-schach und Spiele begins covering computer chess

    Frederic Friedel and colleagues began publishing a magazine devoted to computer chess and related games, creating the editorial setting from which ChessBase emerged.

    Source

A specialist chess-technology and chess-media provider serving serious players, coaches, professionals, and enthusiasts with integrated databases, analysis engines, training content, online play, and news.

• ChessBaseChess database and analysis software1986

  ChessBase is the company's core database platform. It stores, searches, annotates, and analyzes recorded games, supporting player and opening searches as well as position, motif, and material queries. It uses a proprietary ChessBase game format while supporting PGN import and export. The software can work with native ChessBase engines and external UCI-compatible engines, making it useful for preparation, research, coaching, and archival work.

• FritzChess-playing software and graphical interface1991

  Fritz is ChessBase's best-known playing-program family. It began with Frans Morsch's engine and developed into a broader playing and analysis environment. The interface has supported adjustable playing strength, engine analysis, external engines, online services, and training features. In the United States, the early product was marketed under the Knightstalker name.

• PlaychessOnline chess service

  Playchess is ChessBase's internet chess platform for playing games, discussing chess, attending lectures, watching interviews, and accessing chess variants. It has been distributed through ChessBase software and a standalone client, with guest and subscription-style access arrangements. The service has also used Ducats, an internal currency for selected courses and other offerings.

• ChessBase MagazineChess magazine and multimedia training product1987

  ChessBase Magazine is a recurring chess publication distributed with digital content. Its materials have included annotated games, opening developments, tournament coverage, interviews, video clips, and database updates. Content is designed for use with ChessBase software or the free ChessBase Reader and connects editorial publishing with searchable chess data.

• FritzTrainerChess training multimedia1994

  FritzTrainer is a family of instructional products covering openings, tactics, endgames, strategic themes, and player-specific material. The series developed from earlier grandmaster-authored CD-ROMs and later DVDs and digital courses. Its instructional format combines explanations, games, exercises, and board-based demonstrations.

• ChessBase NewsChess news and media website

  ChessBase News is the company's online editorial platform. It publishes chess news, tournament reporting, interviews, instructional material, and information about ChessBase products. The site has been available in English, German, Spanish, and Hindi, supporting the brand's international audience.

• ChessBase game databaseChess data service1998

  The ChessBase game database is a large collection of recorded chess games with metadata and, in many cases, annotations and analytical material. It is available through ChessBase software and online interfaces and is used for opening research, player preparation, historical study, and engine-assisted analysis.

• 2021ChessBase responds to Fat Fritz 2 licensing criticismOther

  Stockfish developers and other chess-technology commentators alleged that Fat Fritz 2 incorporated GPL-licensed Stockfish code without sufficient attribution.

  What changed. ChessBase added references and maintained that Fat Fritz 2 differed from Stockfish because of additional neural-network contributions.

  Aftermath. Stockfish developers filed a lawsuit, and the dispute was settled in 2022.

  • Stockfish — Stockfish developers alleged GPL violations and pursued legal action.
  • Lichess — Lichess publicly criticized Fat Fritz 2 as insufficiently original and challenged ChessBase's characterization of the product.
  Source
• 2015ChessBase launches additional web applicationsProduct launch

  ChessBase was extending its desktop database and playing products into browser-based services.

  What changed. The company introduced a tactics trainer web application, a web version of Play Fritz, and My Games for storing personal games.

  Aftermath. These services broadened ChessBase's online product ecosystem beyond news and database access.

  Source
• 2013Playchess expands to the webGeneration change

  Online chess users increasingly expected browser access in addition to dedicated desktop clients.

  What changed. ChessBase added a web interface to Playchess.

  Aftermath. The online service became more accessible across devices and complemented the existing Fritz-based client experience.

  Source
• 2003Chess Media System launchesProduct launch

  Chess instruction was increasingly moving from printed books and static game scores toward multimedia formats.

  What changed. ChessBase introduced a system that synchronized video instruction with moves displayed on a digital chessboard and commissioned courses from leading players.

  Aftermath. The system established a foundation for ChessBase's continuing multimedia training business.

  Source
• 1998ChessBase moves its game database onlineStrategy

  The company's database had traditionally been distributed through desktop software and physical media.

  What changed. ChessBase made its game database available online while continuing to integrate it with its desktop products.

  Aftermath. The decision extended ChessBase's data service beyond installed software and supported later web-based products.

  Source
• 1991ChessBase adopts Fritz as a major PC chess productProduct launch

  Dedicated chess computers dominated computer-chess ratings and consumer sales, while personal-computer chess software was developing rapidly.

  What changed. ChessBase announced Frans Morsch's program for PC distribution, using Knightstalker in the United States and Fritz in other markets, with Mathias Feist supporting ports to DOS and Windows.

  Aftermath. Fritz became one of ChessBase's central consumer brands and a recurring interface for engines, analysis, training, and online play.

  Source

• 2021Fat Fritz 2 open-source licensing controversyControversy

  Stockfish developers alleged that Fat Fritz 2 was a modified version of Stockfish and did not initially provide adequate attribution or comply with the obligations of the GNU General Public License. Lichess also criticized the product's originality claims. ChessBase added references and argued that the product incorporated additional neural-network work, but critics disputed the distinction and questioned the provenance of that network.

  Source

• 2024ChessBase India exceeds 2.5 million YouTube subscribers

  ChessBase India was reported to have more than 2.5 million YouTube subscribers and more than 2.5 billion total views by December 2024.

  Other
  Source
• 2020ChessBase database surpasses 8.4 million recorded games

  The ChessBase database was reported to contain more than 8.4 million games as of November 2020, illustrating the scale of the company's core data product.

  Product generation
  Source

1. ChessBase
2. ChessBase official website