Extreme Boxed Burr - Frans de Vreugd by Steve Strickland at Puzzlecraft

This is a very nicely made puzzle by Steve.  Frans was able to design what is essentially a 4-Piece burr into a seriously difficult solve by adding a box.

Steve’s unique puzzling pursuit is well documented in this Woodworkers Journal article.  I actually first got into puzzlemaking shortly after this period and can certainly understand Steve’s plight.