The award-winning BrainString Advanced puzzle will tie your brain in knots! Getting a solid color on each side is easy, but you'll get tangled up trying to remove the knot in the middle. Stretch your imagination, to find the solution. The puzzle is shipped in the solved position. To play, move the colorful tips to different sides which tangles the strings. Once you've got it good and twisted, you must move each color tip back to its own side.