Naumov Aleksandr
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Aug. 3, 2025 (latest changes July 30, 2025).
252 place (134.02).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.35
p1 = (727.27 * 2.10 * 0.29 + 347.83 * 2.10 * 0.57 + 137.25 * 3.05 * 0.86 + 0 + 0) / (2.10 * 0.29 + 2.10 * 0.57 + 3.05 * 0.86 + 1 + 1) = 189.04080329712903
p2 = (727.27 * 2.10 * 0.29 + 347.83 * 2.10 * 0.57 + 137.25 * 3.05 * 0.86) / max_coefficients = 78.99153094462541
score = 189.04080329712903 * 0.5 + 78.99153094462541 * 0.5 = 134.0161671208772
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-07-30 | 249 -> 252 | 140.96 -> 134.02 |
Seihoku spring tournament 2024: 71% -> 57% |
| 2025-07-26 | 246 -> 249 | 140.96 | |
| 2025-07-13 | 244 -> 246 | 140.96 | |
| 2025-07-12 | 244 | 140.16 -> 140.96 | |
| 2025-06-22 | 235 -> 244 | 158.50 -> 140.16 |
Mushroom League: 43% -> 29% |
| 2025-06-15 | 227 -> 235 | 159.95 -> 158.50 | |
| 2025-06-14 | 220 -> 227 | 159.95 | |
| 2025-06-11 | 226 -> 220 | 159.95 | |
| 2025-06-09 | 226 | 159.54 -> 159.95 |
Agari Summer Tournament 2024: 100% -> 86% |
| 2025-05-30 | 224 -> 226 | 165.56 -> 159.54 |
Seihoku spring tournament 2024: 86% -> 71% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City |
|---|---|---|---|---|---|---|---|---|
| 1 | 137 |
|
45/52 | 86% | 3.05 | RR | Agari Summer Tournament 2024 | Moscow |
| 2 | 348 |
|
31/47 | 57% | 2.10 | RR | Seihoku spring tournament 2024 | Saint Petersburg |
| 3 | 727 |
|
7/23 | 29% | 2.10 | CRR | Mushroom League | Moscow |