Oparin Konstantin
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Aug. 13, 2025 (latest changes Aug. 9, 2025).
20 place (694.47).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2
p1 = (691.59 * 4 * 0.14 + 590.91 * 2.10 * 0.29 + 717.95 * 2.90 * 0.29 + 843.14 * 3.05 * 0.57 + 990.65 * 4.60 * 0.71 + 196.08 * 3.05 * 0.71 + 772.15 * 3.65 * 0.86 + 894.74 * 3.85 * 1 + 322.58 * 3.10 * 1) / (4 * 0.14 + 2.10 * 0.29 + 2.90 * 0.29 + 3.05 * 0.57 + 4.60 * 0.71 + 3.05 * 0.71 + 3.65 * 0.86 + 3.85 * 1 + 3.10 * 1) = 692.5693053083945
p2 = (894.74 * 3.85 * 1 + 990.65 * 4.60 * 0.71 + 772.15 * 3.65 * 0.86 + 843.14 * 3.05 * 0.57) / max_coefficients = 696.3690789473684
score = 692.5693053083945 * 0.5 + 696.3690789473684 * 0.5 = 694.4691921278815
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-08-09 | 21 -> 20 | 688.99 -> 694.47 |
Agari Summer Tournament 2024: 86% -> 71% |
| 2025-08-04 | 20 -> 21 | 699.87 -> 688.99 |
Riichi over Volga: 100% -> 86% |
| 2025-08-03 | 18 -> 20 | 699.87 | |
| 2025-07-26 | 18 | 700.21 -> 699.87 |
Autumn Agari tournament: 43% -> 29% |
| 2025-07-14 | 20 -> 18 | 700.21 | |
| 2025-07-12 | 14 -> 20 | 719.03 -> 700.21 |
X Russian Championship: 86% -> 71% |
| 2025-07-10 | 14 | 732.27 -> 719.03 |
Agari Spring Tournament 2024: 71% -> 57% |
| 2025-07-03 | 12 -> 14 | 732.20 -> 732.27 |
SPB Riichi Open 2023: 29% -> 14% |
| 2025-06-25 | 13 -> 12 | 732.20 | |
| 2025-06-22 | 13 | 731.50 -> 732.20 |
Mushroom League: 43% -> 29% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 323 |
|
22/32 | 100% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 2 | 270 |
|
66/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 3 | 895 |
|
11/96 | 100% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 4 | 772 |
|
19/80 | 86% | 3.65 | RR | Riichi over Volga | Samara | |
| 5 | 196 |
|
42/52 | 71% | 3.05 | RR | Agari Summer Tournament 2024 | Moscow | |
| 6 | 991 |
|
🥈 | 2/108 | 71% | 4.60 | RR | X Russian Championship | Perm |
| 7 | 843 |
|
9/52 | 57% | 3.05 | RR | Agari Spring Tournament 2024 | Moscow | |
| 8 | 718 |
|
12/40 | 29% | 2.90 | CRR | Autumn Agari tournament | Moscow | |
| 9 | 591 |
|
10/23 | 29% | 2.10 | CRR | Mushroom League | Moscow | |
| 10 | 692 |
|
34/108 | 14% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg |