Xiangqi piece images (red_*.svg / black_*.svg)

Source: PyChess (pychess-variants) open-source project
        https://github.com/gbtami/pychess-variants
        - pieces: static/images/pieces/xiangqi/hnz
License: GNU AGPL-3.0 (repository license)
         https://www.gnu.org/licenses/agpl-3.0.html

The images are used unmodified. Site attribution appears on
About (/about). The 8×4 board, face-down covers, and chrome are
drawn by this site and are not the pychess-variants board bitmap.