Please follow the full text of the question here (with image):
You probably want the KGS rating math page :)
how lazy is this to just put a link to a question elsewhere on the sl frontpage forum and don't even bother to put your question here? (not to mention that you could find an answer in sensei's library and/or put questions at quick questions.)
Sorry I thought it will be senseless to just copy the question text here. And it would not be complete because the linked question contains an image. I thought it is much better to just refer to one site in case of cross-posting and keep all the answers at one place than trying to make some imperfect copy here.
Thanks for the references!