Enhancements (Version 2.0 and later): Tim Mann
Copyright 1991 by Digital Equipment Corporation, Maynard,
-Massachusetts. Enhancements Copyright
-1992-2001,2002,2003,2004,2005,2006,2007,2008,2009 Free Software
-Foundation, Inc.
+Massachusetts.
+
+Enhancements Copyright 1992-2001, 2002, 2003, 2004, 2005, 2006, 2007,
+2008, 2009, 2010 Free Software Foundation, Inc.
+
+Enhancements Copyright 2005 Alessandro Scotti
+
XBoard's alternative piece bitmaps (bitmaps.xchess) are derived from the
bitmaps in the XChess program, which was written and is copyrighted by