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Fiendish Knot Puzzle
By John Cauley
Here’s a puzzle that’s devilishly difficult to solve but quite easy to make. You only need some 3/4" hardwood dowel rods, a 3/4" Forstner bit, a tablesaw and a drill press. At the end of one day in the shop you’ll have a dozen of these inexpensive brainteasers to tantalize your friends.
