a(href="https://en.wikipedia.org/wiki/Fairy_chess_piece") Fairy chess pieces
a(href="http://www.pion.ch/echecs/liste_variantes.php") pion.ch
a(href="http://abrobecker.free.fr/chess/fairyblitz.htm") fairyblitz.htm
+ a(href="https://chessvariants.training/") chessvariants.training