List of chess variants - Wikipedia

List of chess variants Chess magazine, Chess, Chess board

Possibly the Best Chess Variant (www.Revolution) - Chess Forums

7 Chess Games Around the World - Some Dude Says

Sam Trenholme's webpage

Chess notation - Overleaf, Online LaTeX Editor

List of chess variants - Wikipedia

Board Representation - Chessprogramming wiki

List of chess variants - Wikipedia

Chess Variants Dr Eric Silverman

Beirut chess - Wikiwand

Encyclopedia of Chess Variations: Pterodactyl Defense

What is your view of chess variants with a 10x8 board such as Capablanca chess? - Quora