I have not seen any gambling site or skill based site that offers 8 ball pool or chess to play with bitcoin and compete player vs player.If you want you can apply this and create such site.It will be unique too 
Pool and chess is already exist in bitcoin and I ever play that but they are not making any site to let all people gather around for playing it. Just let people 1vs1 with OP, after one done then wait others for playing again same to chess but last time I didnt see many people attract to this game because it takes time meanwhile people want a fast gambling game that fast earn too
When were you able to bet bitcoins on pool matches direct at a site? if so i want to play. I know some people play and bet bitcoins outsite of the site but that is different. Chess is impossible for betting.
yah chess is very hard to bet cuz it is long, the popularity of chess is not that great so limited bets pool, and can cheat easily.