Dirty Dog _ Tavern Puzzles Heavy Metal Disentanglement-Style Brain Teaser Old fashioned heavy metal brain teaser disentanglement puzzles. Objective of DIRTY DOG is to remove the large narrow "U-shaped" piece (indicated by BLUE arrow) Replacing the shuttle to the starting position is equally as challenging. Rated as a Level 2 "Intermediate" (on a scale of 1 to 4). Packaged in cloth bag and with solution