The complexity in "Where are the Cows?" includes self-reference, changing rules, and flow charts. It is also worded so as to provoke confusion between an object (such as red text), a reference to an object (such as the word "red"), and even more subtle references (the word "word"). The maze ends up being so complicated that it can even be difficult to work out the next move, let alone the end. In this maze, you have to use two hands, each starting at a different place. The instructions in one box might have to do with the box that the other hand is in, boxes you have already left, or complex combinations of the two.