PuzzCAPTCHA implements a unique form of anti-bot protection, to help limit unauthorized access of forms by automated bots. The user is presented with an image that they must first assemble before entering in the challenge phrase into a text box. Since most bots would require an assembled image to be able to machine read text, this allows for greater image readability for the common user, hence greatly improving the user experience when such measures are necessary.
Please note that PuzzCAPTCHA is a patented technology and may not be used without express written permission. If you are interested in licensing this product please contact me.