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
Klubbar
4 Player Chess
49 805 Medlemmar
Fog of War
5 763 Medlemmar
Variants
4 366 Medlemmar
8 Player Chess
914 Medlemmar
4PC Teams
385 Medlemmar