New Ranks vs Old Ranks, Who Got What

Since both rating formula and ratings themselves changed, it’s interesting to see how ranks changed. I polled a bunch of active players. So linear.

image

Roughly like this, from linear fit

34k->23.8k
33k->22.9k
32k->22.1k
31k->21.2k
30k->20.9k
29k->19.8k
28k->18.9k
27k->18.2k
26k->17.5k
25k->16.7k
24k->15.9k
23k->15.3k
22k->14.4k
21k->13.8k
20k->13.1k
19k->12.3k
18k->11.7k
17k->10.7k
16k->10.1k
14k->8.6k
13k->7.8k
12k->7.0k
11k->6.3k
10k->5.6k
9k->4.7k
8k->4.0k
7k->3.2k
6k->2.5k
5k->1.7k
4k->1.0k
3k->0.2k
2k->1.5d
1k->2.3d
1d->3.0d
2d->3.9d

new_rank = 0.75459341 * old_rank + 9.00910366

So at 30k we get 9 stone boost to 21k. And at 7d we get no change at all. And at stronger 9d ranks it means their ranks get a little more difficult.

The ranks get a little bunched up, so with the same strength difference you’d give less handicap stones with the new system.

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Thanks, @S_Alexander,

No idea whether it’s worth something, but I just had to take your numbers and make this graph to visualize how much the old ranks gained:

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There have been several people that called for ranks below 25 kyu to be reinstated and differentiated. I guess with the rank system adjustment, they effectively got their wish, since old ranks as low as 34 kyu are now in the measured range of the current system.

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Here is another visualization roughly depicting (within +/- 1 rank) the above data

A few observations…

  1. Old ranks from roughly 26 to 35 kyu have effectively been reinstated, but given a big boost to now be viewed as at least 25 kyu
  2. The new TPK (20+ kyu) ranks were completely off the old scale
  3. The adjustment slope of ~0.75 reduces the amount of handicap stones used. Two players that formerly played with 4 stones would now only use 3.
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Yes, it appears farming weak players with handicap for rating points is gonna be even easier now.

Especially when there’s no losing when winning annoyance anymore.

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Nice diagram!

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Does anyone have a NEW version of this table?

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525: 30k
548.2: 29k
572.4: 28k
597.7: 27k
624.1: 26k
651.6: 25k
680.4: 24k
710.4: 23k
741.8: 22k
774.5: 21k
808.7: 20k
844.4: 19k
881.7: 18k
920.6: 17k
961.2: 16k
1003.6: 15k
1047.9: 14k
1094.2: 13k
1142.5: 12k
1192.9: 11k
1245.6: 10k
1300.6: 9k
1358: 8k
1417.9: 7k
1480.5: 6k
1545.9: 5k
1614.1: 4k
1685.4: 3k
1759.8: 2k
1837.4: 1k
1918.5: 1d
2003.2: 2d
2091.7: 3d
2184: 4d
2280.4: 5d
2381.1: 6d
2486.2: 7d
2595.9: 8d
2710.5: 9d
2830.1: 10d

EDIT: oops; missed 1d. Internet cookie for guessing the logic that caused my program to do that. :smiley:
EDIT: fixed.

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