SVG standard images found on chesstempo website:
https://www4.chesstempo.com/images/pieces/svg/merida/whitepawn.vers1.svg (...)
+ Adaptation for checkered pieces
Some fairy pieces found on the web and icon scout: https://iconscout.com/
PNG images for Eightpieces from https://greenchess.net/index.php and Jeff Kubach design.
Images of the Hawk and Elephant were designed by "Couch Tomato #2218" on Discord,
for the pychess-variants website (http://pychess-variants.herokuapp.com/)