Since the traditional k/d ranks might not make sense due to the different ratings pools, maybe a different approach is needed.
Perhaps OGS could come up with a similar metric that takes advantage of Glicko's strengths. Glicko is a relative rating scale. With the Glicko math, you can calculate chance of winning an even game based on rating differences, right?
Could we have a tier system where people in Tier 2 have a 75% chance to beat people in Tier 1? Then people in tier 3 have a 75% chance to beat people in tier 2 and so on.
For each of time/size sections in the table, you could sort rank all the players on OGS based on their 95% confidence interval rating and start the bottom people at Tier 1, then bucket everyone by score above the base.
There could be a separate site wide page that shows the table with an average/median Tier level for each dan/kyu rank.
- It's different enough from the traditional k/d ranks, but the purpose is very similar. So it would distinguish itself from the overall k/d rank without appearing as a confusing duplicate. The overall k/d will appear more prominently and clear all doubts that this is your OGS rank.
- Players can compete in whatever categories they prefer and still have a metric that spurs competition and still shows progress.
- It would serve to highlight the incredible depth of go.
- There's no top limit for competitors, this could attract strong players seeking a high score. (maybe not, but we can be optimistic)
The 75% is arbitrary, could pick any percentage that makes sense.
This is longer than I thought it would be. Mods feel free to split it into a different topic if I went too far.