Chess problem databases
- WinChloe Database – Christian Poisson
- Yet Another Chess Problem Database – Dmitri Turevski
- Chess Problem Database Server – Gerd Wilts
- Zweizüger-Datenbank – Udo Degener
- MESON Chess Problem Database – Brian Stephenson
- Database of chess etudes – Serhij Diduch
- Endgame Study Database VI – Harold van der Heijden
- Solving Tournaments Problem Database – Luc Palmans
- Composers Names In Various Alphabets – Thomas Maeder
- Syzygy tablebases