Oparin Konstantin
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Sept. 21, 2026 (latest changes Sept. 17, 2026).
75 place (548.72).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 3.40 * 1 + 3.40 * 1) = 15.41
p1 = (269.66 * 3.75 * 0.14 + 322.58 * 3.10 * 0.29 + 160 * 3.10 * 1 + 703.70 * 2.45 * 1 + 587.41 * 4.71 * 1 + 929.58 * 3.40 * 1) / (3.75 * 0.14 + 3.10 * 0.29 + 3.10 * 1 + 2.45 * 1 + 4.71 * 1 + 3.40 * 1) = 568.7447804585007
p2 = (929.58 * 3.40 * 1 + 587.41 * 4.71 * 1 + 703.70 * 2.45 * 1 + 160 * 3.10 * 1) / max_coefficients = 528.704737183647
score = 568.7447804585007 * 0.5 + 528.704737183647 * 0.5 = 548.7247588210739
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-09-07 | 77 -> 75 | 545.21 -> 548.72 |
Moscow Open Riichi Marathon: 43% -> 29% |
| 2026-09-06 | 137 -> 77 | 404.99 -> 545.21 |
Sunset Wolf Cup 2026: 0% -> 100% |
| 2026-09-01 | 133 -> 137 | 416.52 -> 404.99 |
SPB Riichi Open 2024: 14% -> 0% |
| 2026-08-31 | 134 -> 133 | 415.95 -> 416.52 | |
| 2026-08-30 | 131 -> 134 | 415.95 | |
| 2026-08-16 | 127 -> 131 | 415.95 | |
| 2026-08-15 | 127 | 414.65 -> 415.95 | |
| 2026-08-13 | 130 -> 127 | 410.44 -> 414.65 |
Moscow Riichi 2024: 29% -> 14% |
| 2026-08-08 | 131 -> 130 | 410.44 | |
| 2026-08-04 | 131 | 416.19 -> 410.44 |
Riichi over Volga: 14% -> 0% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 930 |
|
6/72 | 100% | 3.40 | RR | Sunset Wolf Cup 2026 | Saint Petersburg | |
| 2 | 587 |
|
60/144 | 100% | 4.71 | RR | XII Russian Championship | Samara | |
| 3 | 704 |
|
9/28 | 100% | 2.45 | RR | Hatiko under the sakura | Korolyov | |
| 4 | 160 |
|
43/51 | 100% | 3.10 | RR | Moscow Riichi 2026 | Moscow | |
| 5 | 323 |
|
22/32 | 29% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 6 | 270 |
|
66/90 | 14% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 7 | 895 |
|
11/96 | 0% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 8 | 772 |
|
19/80 | 0% | 3.65 | RR | Riichi over Volga | Samara | |
| 9 | 196 |
|
42/52 | 0% | 3.05 | RR | Agari Summer Tournament 2024 | Moscow | |
| 10 | 991 |
|
🥈 | 2/108 | 0% | 4.60 | RR | X Russian Championship | Perm |
| 11 | 843 |
|
9/52 | 0% | 3.05 | RR | Agari Spring Tournament 2024 | Moscow | |
| 12 | 718 |
|
12/40 | 0% | 2.90 | CRR | Autumn Agari tournament | Moscow | |
| 13 | 591 |
|
10/23 | 0% | 2.10 | CRR | Mushroom League | Moscow | |
| 14 | 692 |
|
34/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg |