The online Blitz/Quick rating list had most of its content deleted this month. Is that a glitch or something else? I know ICC isn’t running rated online tournaments at this time, but I thought chess.com was.
Here’s a list of players by month for the last 20 months showing the total number of players and the number who had an updated or new published rating in that month for each of our 6 ratings systems, I think what you’re seeing is a result of corrections to some of the ratings procedures that were done just before the December 2023 list, primarily changing the bonus factor retroactive to February of 2023. You’ll see that the counts for that month were much higher than a typical month for all 6 ratings systems.
rsuppdt count otb_reg otb_quick otb_blitz onl_reg onl_quick onl_blitz
---------- ----- ------- --------- --------- ------- --------- ---------
2025-03-01 40927 39138 38541 10422 5528 6137 2933
2025-02-01 22103 21269 20735 7261 4297 4624 2434
2025-01-01 31164 30038 29712 8385 4774 5037 2449
2024-12-01 38538 37079 36538 9735 5298 5957 2847
2024-11-01 27497 26304 25874 7741 4311 5019 2426
2024-10-01 24247 23098 22548 8066 4984 5815 2825
2024-09-01 27969 26663 25571 10184 5581 6322 3338
2024-08-01 20793 19959 19304 7598 4308 4701 2584
2024-07-01 29280 27748 26951 9333 5379 6371 3261
2024-06-01 30421 29187 28555 8232 5125 5831 2803
2024-05-01 31859 30500 29801 8536 5116 5791 2807
2024-04-01 36918 35375 34632 8965 5901 6629 3082
2024-03-01 39947 38340 37627 9267 5901 6542 3073
2024-02-01 24376 23341 22510 7346 4776 5480 2765
2024-01-01 35356 33698 33161 8664 5796 6663 3518
2023-12-01 71887 68220 65848 15785 9890 11178 5295
2023-11-01 29152 27399 27074 7139 4955 6294 2803
2023-10-01 28118 26390 25391 8529 5665 6940 3278
2023-09-01 20398 19345 18754 6828 4817 5285 2752
2023-08-01 21078 20057 19425 6918 4746 5166 2768