The license for Bonanza (top-level shogi computer player) is clearly
non-free because of the "non-commercial" clause. Aside from that, my
interpretation is this could be acceptable in non-free - does this
look OK ?
Homepage  is in japanese, candidate source code for packaging can
be found at , "Legal notices" in readme.txt only reads:
This program is protected by copyright. Without a specific
permission, any means of commercial applications are prohibited.
Furthermore, this program is distributed without any warranty.
Within these limits, you can use, redistribute, and/or modify it.