Variants Puzzles and others: https://chessvariants.training/
https://altcodeunicode.com/alt-codes-math-symbols-italic-letters/
FoW: https://www.chess.com/blog/Illingworth/fog-of-war-chess-grandmaster-strategy
some crazyhouse study for future reference: https://lichess.org/study/OHSQPWgG
Клубы
PRO Chess League
20 941 пользователь
The RAR Newspaper Archives
30 пользователей
Chess University
112 018 пользователей
Xio Succ
2 пользователя
4 Player Chess
51 913 пользователей