TL;DR
The article introduces an unofficial port of the Sunfish Chess Engine, called micropython-uSunfish, developed by GitHub user fizban99. This version is designed to run on MicroPython, a lightweight implementation of Python for microcontrollers, and has been tested specifically on the ESP32-S3 microcontroller. However, it’s not very demanding in terms of memory, meaning it should also work well on the standard ESP32.