<Just under...
You can also set additional conditions to fit your requirements of opponents. If you don't want to use them or they seem to be too difficult, just click on "Continue" button and leave the rest of this form unchanged.

...in a game invite, you can play against rated players that match these settings...could someone explain this, because I think it should be...

100 => BKR = 2700
not
100 = BKR = 2700
As it doesn't make any sense to me.

Thanks
Dave