ChessPicker — Open-source notices

ChessPicker is an ChessPicker product. Third-party software remains the property of its respective copyright holders. ChessPicker does not claim ownership of third-party open-source software.

docx

ChessPicker includes a browser bundle of the docx JavaScript library for generating downloadable Word reports. The docx project is distributed under the MIT License.

Project source: github.com/dolanmiu/docx

MIT License

Copyright (c) 2016 Dolan Miu

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Bundled dependency notices

The distributed assets/docx.umd.js bundle contains license comments for bundled dependencies, including MIT/BSD-licensed components. Those embedded notices are retained in the distributed file.

Lichess chess-openings dataset (World ECO A00–E99)

The optional World ECO reference library loads ECO codes, opening names and representative PGN move sequences from lichess-org/chess-openings. The upstream project states that this factual dataset is released under the CC0 Public Domain Dedication.

Project source: github.com/lichess-org/chess-openings

ChessPicker does not claim ownership of the upstream ECO codes, opening names or factual representative move sequences. ChessPicker Teacher Briefing, training guidance, interface and lesson presentation are separate ChessPicker material.

Chess rules / computer-play code

This build uses ChessPicker's local JavaScript chess-rules implementation and Stockfish.js 19 Lite for computer play in the academy and practice pages. For complete Famous Game PGN reconstruction it also loads chess.js 0.10.3 from cdnjs.

Stockfish.js 19 Lite — computer opponent

Stockfish.js 19, npm version 19.0.1, is distributed under the GNU General Public License version 3. The lightweight single-threaded JavaScript/WebAssembly engine files are included unmodified. Copyright Chess.com, LLC and Stockfish contributors. See engine headers for credits.

Read the GPL v3 licence · Binary provenance and corresponding source · Exact release source and build scripts

chess.js

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Beginner Academy — Wikimedia Commons player photographs

The Beginner Academy may load colour photographs from Wikimedia Commons. Each file remains under the licence stated on its Wikimedia Commons description page. Sources used in this build include: “Viswanathan Anand (2016) (cropped).jpeg” by Wolfgang Jekel (CC BY 2.0); “Dommaraju Gukesh in 2023.jpg” by Frans Peeters (CC BY-SA 2.0); “Rameshbabu Praggnanandhaa in 2023.jpg” (Wikimedia Commons file page/licence); “15-10-10-Magnus Carlsen-RalfR-N3S 2325.jpg” (Wikimedia Commons file page/licence); and “Judit Polgar (cropped).jpg” by Stefan64 (licences listed on Commons, including CC BY-SA/GFDL). ChessPicker does not claim ownership of these photographs.