When I first tried to sign up to chatgpt, I got an authentication puzzle which I was totally unable to understand and solve ( I re-applied and got a reasonable one). I would like to know what the meaning of the first puzzle was and how to solve it.
The puzzle consisted of a series of two rectangles. On the left, there were usually a one- or two-digit number and an image. On the right, there were the same number and a few images including one the same as the one on the left. These items were to lleft and above a rectalinear line sort of like a path along regular city blocks, turning at corners. There was a tiny blue blob on the line (After many tries, I realized that the blob was supposed to be a train). The instructions were to place the train on the give (?) coordinates. I finally found the “train” but never the coordinates.