Oparin Konstantin
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Oct. 31, 2025 (latest changes Oct. 27, 2025).
42 place (607.32).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.85 * 0.86) = 14.349835
p1 = (717.95 * 2.90 * 0.14 + 843.14 * 3.05 * 0.43 + 990.65 * 4.60 * 0.57 + 196.08 * 3.05 * 0.57 + 772.15 * 3.65 * 0.71 + 894.74 * 3.85 * 0.86 + 269.66 * 3.75 * 0.86 + 322.58 * 3.10 * 1) / (2.90 * 0.14 + 3.05 * 0.43 + 4.60 * 0.57 + 3.05 * 0.57 + 3.65 * 0.71 + 3.85 * 0.86 + 3.75 * 0.86 + 3.10 * 1) = 610.3340039494365
p2 = (894.74 * 3.85 * 0.86 + 990.65 * 4.60 * 0.57 + 772.15 * 3.65 * 0.71 + 843.14 * 3.05 * 0.43) / max_coefficients = 604.3052062967971
score = 610.3340039494365 * 0.5 + 604.3052062967971 * 0.5 = 607.3196051231168
Rating changes
| Date | Place | Points | Reason | 
|---|---|---|---|
| 2025-10-22 | 42 | 607.16 -> 607.32 | Mushroom League: 14% -> 0% | 
| 2025-10-13 | 45 -> 42 | 593.21 -> 607.16 | Moscow Riichi 2024: 100% -> 86% | 
| 2025-10-09 | 46 -> 45 | 588.71 -> 593.21 | Agari Summer Tournament 2024: 71% -> 57% | 
| 2025-10-04 | 45 -> 46 | 604.65 -> 588.71 | Riichi over Volga: 86% -> 71% | 
| 2025-09-26 | 45 | 605.88 -> 604.65 | Autumn Agari tournament: 29% -> 14% | 
| 2025-09-12 | 41 -> 45 | 633.96 -> 605.88 | X Russian Championship: 71% -> 57% | 
| 2025-09-10 | 37 -> 41 | 648.71 -> 633.96 | Agari Spring Tournament 2024: 57% -> 43% | 
| 2025-09-03 | 27 -> 37 | 685.06 -> 648.71 | SPB Riichi Open 2023: 14% -> 0% | 
| 2025-09-01 | 24 -> 27 | 695.27 -> 685.06 | SPB Riichi Open 2024: 100% -> 86% | 
| 2025-08-31 | 20 -> 24 | 695.27 | 
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 | 86% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 3 | 895 |  | 11/96 | 86% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 4 | 772 |  | 19/80 | 71% | 3.65 | RR | Riichi over Volga | Samara | |
| 5 | 196 |  | 42/52 | 57% | 3.05 | RR | Agari Summer Tournament 2024 | Moscow | |
| 6 | 991 |  | 🥈 | 2/108 | 57% | 4.60 | RR | X Russian Championship | Perm | 
| 7 | 843 |  | 9/52 | 43% | 3.05 | RR | Agari Spring Tournament 2024 | Moscow | |
| 8 | 718 |  | 12/40 | 14% | 2.90 | CRR | Autumn Agari tournament | Moscow | |
| 9 | 591 |  | 10/23 | 0% | 2.10 | CRR | Mushroom League | Moscow | |
| 10 | 692 |  | 34/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg |