I would go without this PCB. Normal wooden pieces with a magnet, and a normal board with a LED would look better, and would be cheaper. Plus a touch or e-paper display (who starts: white or black, ...)

Looked around and found this perfect set. Smart Electronic Chessboard https://a.aliexpress.com/_Ex1ynXa

I also found a dutch e-paper board but the Chinese looked much better.