Legal notice

Information according to § 5 DDG

Contact

Email: info@chesstoteles.com

Responsible for the content according to § 18 (2) MStV

Liability for content

The content of these pages was created with care. However, no guarantee can be given for the correctness, completeness and timeliness of the content – such as the game data, move sequences and evaluations. As a service provider I am responsible for my own content on these pages under the general laws.

Liability for links

These pages occasionally contain links to external websites of third parties on whose content I have no influence. The respective provider or operator is always responsible for this third-party content. At the time of linking no legal violations were recognizable; if they become known, such links will be removed immediately.

Copyright

The texts and the design of these pages are subject to German copyright law. For pictures, chess pieces, game data and the chess engine the origins and licences named under picture credits and licences apply.

Picture credits and licences

Pictures

The logo, the favicon and the preview picture (an owl at night over a chessboard) are generated with artificial intelligence.

The logos of the other portals of the family (chesstoteles, chessepolis, chessophos) in the cards of the home page come from these portals and are likewise generated with artificial intelligence.

Chess pieces

The pieces on the chessboards are the piece set “cburnett” by Colin M. L. Burnett, as also used on lichess. They are under the GNU General Public License, version 2 or later, and are used unchanged.

Licence text: GPL-2.0.txt

Positions

The basic positions of the principles are common endgame knowledge, set up here as positions of our own; the study by Georges Barbier and Fernando Saavedra (1895) is in the public domain. The pages show 9 positions.

Chess engine

The analysis board and “My endgames” use the chess engine Stockfish in two versions from stockfish.js, both under the GNU General Public License, version 3, delivered unchanged: small (the default) – Stockfish 19 lite with its small network on one processor core, 1.8 MB (stockfish.js 19.0.0) – and full – Stockfish 19 with its large network on all processor cores but one, 99.1 MB (stockfish.js 19.0.1). Visitors choose which version computes in the settings, part “Stockfish”; without a choice the small one computes. The full one is loaded only when it is chosen and Stockfish is switched on or “Load now” is tapped in the settings – once; afterwards it stays in the browser until it is removed there. It runs only in browsers that share memory between several processor cores; in others the small one computes. Both run entirely in the visitors’ browser; no data is transmitted.

Licence text: COPYING.txt · Source code: stockfish.js 19.0.0, stockfish.js 19.0.1, github.com/official-stockfish/Stockfish