Not exactly. I'm talking about one, where the randomness is coming from the blockchain.
There are
http://bettingblocks.com/ and
http://block777.com/, in which you can gamble on which pool will find a particular block.
I have also seen a few sites that allow people to gamble on the block hash or the "nonce" of the block (eg. Is the last number in the hash odd or even? Is the last two digit of the nonce <50? etc), but those sites didn't seem to get much attention and soon disappeared.
Neither of these seem to be active anymore...
i dont think that there are any of such websites, though im not sure about it, i think you should do some research about it but it would be most probably just a waste of time
I just noticed a game on this board which seems to be 100% blockchain based gambling game. It is
www.bitcoinbetting.website.
Thanks. Added in OP.