In addition to the contributors who appear in this paper, I would
like to thank Jerry Slocum and the other `puzzle nuts' for keeping my
interest in puzzles high; Rex Shudde for preparing this document for
duplication using PCTeX and PiCTeX; Barbie Cutler for helping with the
original piece drawings; and Janice Cutler for putting up with my shenanigans.
This paper is dedicated to C. Arthur Cross and Tom O'Beirne.
During my earlier research on solid solutions of the 6-piece burr they
shared their results with me in numerous letters. I do not know if
either of them ever became involved with `holey' 6-piece designs, but
their interest spurred me on in years past.
Copyright 2000-2002 Bill Cutler Puzzles, Inc.