Hi, 2 links explained on Wiki, a Fischer Random Chess or Chess960....
https://fr.wikipedia.org/wiki/%C3%89checs_al%C3%A9atoires_Fischer
https://commons.wikimedia.org/wiki/Category:Chess960?uselang=fr
http://www.pousseurdebois.fr/variantes-du-jeu-dechecs/chess960-play/
Chess 960 ? Just like fireworks and maze , is full of colourful and mysterious :~