YANKEE INGENUITY _ Tavern Puzzles Heavy Metal Disentanglement-Style Brain Teaser Old fashioned heavy metal brain teaser disentanglement puzzles. Double click on image for enlarged view. Objective of YANKEE INGENUITY is to remove the big 3" ring (indicated by the blue arrows). Replacing the Ring to the starting position is equally as challenging. Rated as a level 4 "Very Difficult / Very,Very Severe" (on a scale of 1 to 4). On this scale both level 3 and 4 are very challenging. Blacksmith Puzzles hand forged here in the United States of America. Bagged then boxed with solution.