Alfons originally released this insanely difficult burr puzzle in 2017, and this was the first burr that I had to sneak a peak at the burrtools file to disassemble it!  It’s essentially a 12 piece burr, however there’s a frame that restricts movement and three ‘Dog’ pieces packed inside that further hinder your progress.Alfons drilled holes in the bottom of the frame and included a wire rod that you need to use for pushing/prodding the ‘Dogs’.It’s a very clever puzzle and I tip m...