https://arkadiuszkondas.com/php-grandmaster/

Schachsophie: "If you want, you can play against this software.
I already today have played and won in the first try!
So let's train our chess together and play against this relative weak program."

If you want to know more inside knowledge how to program a software like this in PHP (**), then go to this area:

Write your own simple chess AI in PHP (*)

https://arkadiuszkondas.com/write-your-own-simple-chess-ai-in-php/

Original article from March 30, 2017 by Lauri Hartikka:

"The strength of even a simple chess-playing algorithm is that it doesn’t make stupid mistakes. This said, it still lacks strategic understanding.

With the methods I introduced here, we’ve been able to program a chess-playing-algorithm that can play basic chess. The “AI-part” (move-generation excluded) of the final algorithm is just 200 lines of code, meaning the basic concepts are quite simple to implement. You can check out the final version is on GitHub."

https://www.freecodecamp.org/news/simple-chess-ai-step-by-step-1d55a9266977

*) AI = Artificial Intelligence

**) PHP = PHP:Hypertext Preprocessor“
       System requirement is PHP in version 7.2 or above.