Chess variant - Wikipedia

Capablanca's Chess – Green Chess

D-Chess - Dhamma Wiki

List of chess variants - Wikipedia

Games of the Discworld - Wikipedia

Quatrochess - Wikipedia

do not look up the wikipedia article for fairy chess. worst mistake of my life : r/adhdmeme

Taikyoku shogi, the largest variant of Japanese Chess: Played on a board of 1,296 squares, with 209 types of pieces and each player making over a thousand moves in a game. : r/wikipedia

Jeiqi - Chessprogramming wiki

List of chess variants - Wikipedia

PyChess - Chessprogramming wiki

Chess variant - Wikipedia