- Chess icons and favicon from https://github.com/oakmac/chessboardjs
- Shovel icon from Vectors Market, Flaticon, https://www.flaticon.com/free-icons/shovel
- Shogi icons from Wikimedia Commons by Hari Seldon under Creative Commons Attribution-Share Alike 3.0 Unported
- Digital font from The FontStruction, https://fontstruct.com/fontstructions/show/583495, by jon889 under a Creative Commons Attribution Share Alike
- Plus and Minus icons are from https://fontawesome.com/icons