May I use the piece bitmaps from XBoard/WinBoard in my own program?
The piece bitmaps used in XBoard and WinBoard were designed by Elmar Bartel. He released them under the GNU General Public License. This means that if your program is also free software distributed under the GPL, you can use them freely. If your program is distributed under some other license, including commercial, shareware, or non-GPL freeware, then you cannot use the bitmaps unless you obtain special permission from Elmar. See the file README.bitmaps that comes with the XBoard and WinBoard source code for more information and an email address you can write to.
