About ChessPuzzle.net

ChessPuzzle.net is an experiment in algorithmic discovery of chess puzzles.

Last update May 28th, 2020. Read the release notes.

Development

• Martin Bennedik

Concept

• Martin Bennedik
• Oliver Koeller
• Jens Lieberum
• Olga Dolzhykova

Sponsors

• Play Magnus, the Magnus Carlsen company

Logo design

• Marcel Bennedik

Sound

• IonicFlow, Marco Schmoll

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
• If you'd like to help with translations in more languages, you can contact me.

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
• 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
• 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.
• Achievement icons are by Freepik.

Testing and feedback

• Ed Chang
• Felix Kleinschmidt
• Jens Lieberum
• Oliver Koeller
• Stefan Thede
• Wolfram Bernhardt