ThinkFun Zig Zag Knot
This "cousin" of Gordian's Knot is elegant and cunning. Untangling Zig-Zag Knot is not as easy as it looks! Slide each piece in the correct sequence of 37 moves to take Zig-Zag Knot apart. With every move you make, one or more pieces will move easily - but there's only one correct sequence. It's up to you to determine which move is the right one!