Trust me, there isn't too much correspondence, since this site uses the Glicko rating system, which doesn't result in a gain or loss of points similar to the ELO OTB system. Also, there has been various tinkering with the current system, since he cannot make up his mind how to properly implement it, and I have argued that the Glicko system should be abandoned. Also, although if there was a good rating system, you could argue that your rating indicates your skill in tactics, it is very dissimilar to the OTB experience. Here, you might have to have a perfect solution to be considered right, whereas in a game, you can make mistakes, and still be victorious. Also, in a game, a draw is an option, but not here.