About ChessPuzzle.net

ChessPuzzle.net is an ongoing research project in algorithmic discovery of chess puzzles.

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Contact

This website and the puzzle algorithm are created and owned by Martin Bennedik.

You can contact me to send any feedback.

Development

Martin Bennedik

Concept

Martin Bennedik
Oliver Koeller
Jens Lieberum
Olga Dolzhykova

Design

Logo design by Marcel Bennedik
Artwork by Alex Bottenberg
Concept art by Axel Bottenberg
Puzzle Climb and Puzzle Academy artwork by Hotam Jamaludin

Sound

IonicFlow, Marco Schmoll

Blog

Martin Justesen

Translations

Translation system provided by Austin Lockwood
Turkish translation by Bahadır Kaplan
Russian translation by Nikolay Poleshchuk
Dutch translation by Wim van Vugt
Finnish translation by Panu Laine
Chinese translation by Jin Ni
Hindi translation by Anil Singh
Arabic translation by Ahmed Abo Zakaa
Japanese translation by Atsushi Saitou
Portuguese translation by Luís Santos
Croatian translation by Leonardo Ljubičić
Spanish translation by Carlos Leon Cranbourne
Romanian translation by Delia Duca
French translation by Matthieu Viers
Indonesian translation by Heri Darmanto
If you'd like to help with translations in more languages, you can contact me.

Testing and feedback

Alan Rossi
Bahadır Kaplan
Ed Chang
Felix Kleinschmidt
Gabriel Loy
Jens Lieberum
Martin Justesen
Oliver Koeller
Perlen vom Bodensee
Philipp Humburg
quarterplay367
Stefan Thede
Wolfram Bernhardt

ChessPuzzle.net uses

Canvas Chess by Ryan Cook
Stockfish chess engine, licensed under GPL
Stockfish.js 8.0 browser chess engine by Niklas Fiekas, licensed under GPL
Syzygy table bases by Ronald de Man
Gaviota table bases by Miguel A. Ballicora
Syzygy table base probing code by Ronald de Man, Basil Falcinelli, Jon Dart, David Elliott, and the Ceres Authors.
Absolute Zero C# bit boards and search algorithm by Zong Zheng Li, licensed under Creative Commons Attribution
chess.js, a Javascript chess library by Jeff Hlywa
Current games are from The Week In Chess by Mark Crowther, or provided directly by tournament organizers.
Historical games are from:
- The TWIC archives by Mark Crowther
- Britbase by John Saunders
- Dutchbase by the Max Euwe Centrum
- Olimpbase by Wojciech Bartelski
- PGN Mentor
- Big Database by ChessBase
- UltraCorr by Tim Harding
- Opening Master Chess Databases by Opening Master
Chess piece sets:
- CBurnett by C. Burnett for Wikipedia, licensed under CC BY_SA
- Chess7 by Style 7
- Chessnut by Alexis Luengas, licensed under Apache License 2.0
- Chicago, Iowa, and Oslo by Ben J. Friedrich's Chess Foundry Pack, licensed under CC BY-ND
- Fantasy by Maurizio Monge for Wikipedia
- Kosal by Philatype, licensed under Creative Commons Attribution 4.0 International Public License
- Leipzig, Magnetic, Maya, and Merida by Armando Hernández Marroquin
Player text excerpts and image thumbnails are from Wikipedia, licensed under CC BY_SA.
Images for levels 41-60 are by Lennart Ootes, except
- Adolf Anderssen, public domain image from Wikipedia
- Viktor Korchnoi, photo by Rob Bogaerts, Nationaal Archief
- Mikhail Tal, photo by E. Ekekyan
- Anatoly Karpov, photo by R.C. Croes, Nationaal Archief
- Image colorizations by DeOldify algorithm, implementation provided by MyHeritage
Icons by Font Awesome licensed under CC BY 4.0.
Social media background images from freepik.com created by rawpixel.com, and from Pexels.
Confetti animation by MathuSum Mut, licensed under MIT License.
Howler.js by James Simpson and GoldFire Studios, Inc., lincensed under MIT license