somehow visualize the isolated player groups in the ranking

[nczempin]

People complain about the ratings because they look like they are global, when actually they are just several fairly isolated groups ranked on a similar scale; generally Code S Koreans most likely should be ranked higher.

It is what it is; hopefully these isolated regions will take points off each other over time.

In the meantime, perhaps it makes sense to somehow mark those clusters (in the Venn diagram) in the actual rating, for example by colour-coding the players.