Chess engine is already a solved problem, yes, but Baghchal would love some attention. I have been maintaining https://www.baghchal.net for more than a decade now and I dream of the day I could integrate Stockfish like Engine for Baghchal one day. I haven't gotten chance to dive deep into this myself because of work and personal reasons but it could be a great niche to explore since you mentioned about Chess. Look into it.

Also, check this: https://github.com/bhu1st/obx