How to configure the selection of identical pictures?

Question

JavaScript

Salute to all!
In one of the projects I ran into such a task -
(I’ll simplify for better clarity)
in a field of 6x6 blocks there are three pairs of identical images,
you need to identify these pairs by clicking and flipping the blocks.
Remember, before there were such simple toys for memory ...
With JS, you are still on you, so I could just make a coup, like this one .
You need to set the return of the image and the fixation of similar values.
Tell me, please, in which direction to drip and how to fix it all ... :)

Answer 1

I wonder who will lay out the algorithms and, in general, the code for recognizing the captcha ..... I think there will be no one willing, no matter how, this is a very relevant topic for all kinds of bots