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
Kelab-kelab
4 Player Chess
51,359 Ahli
Fog of War
5,778 Ahli
Variants
4,581 Ahli
8 Player Chess
922 Ahli
4PC Teams
392 Ahli