Since Jim has not made one yet...

Here is a 64 bit Greko 6.3 binary:
http://cap.connx.com/chess-engines/new- ... 64.exe.bz2
http://cap.connx.com/chess-engines/new- ... 64.exe.bz2
Discussions (not only) about Xboard/Winboard, Computer Chess and Chess Programming
http://w.open-aurec.com/wbforum/