Astafev Mikhail
From Yekaterinburg, Russia
Internal rating (RR)
Rating date May 20, 2025 (latest changes May 12, 2025).
168 place (197.37).
how we calculated rating score
max_coefficients = (4.60 * 0.86 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.19266
p1 = (678.16 * 3.75 * 0.14 + 252.34 * 4 * 0.29 + 102.80 * 4.60 * 0.86 + 212.77 * 2.80 * 1 + 202.53 * 3.65 * 1 + 354.84 * 2.40 * 1) / (3.75 * 0.14 + 4 * 0.29 + 4.60 * 0.86 + 2.80 * 1 + 3.65 * 1 + 2.40 * 1) = 224.14587182177732
p2 = (354.84 * 2.40 * 1 + 202.53 * 3.65 * 1 + 212.77 * 2.80 * 1 + 102.80 * 4.60 * 0.86) / max_coefficients = 170.60277792039054
score = 224.14587182177732 * 0.5 + 170.60277792039054 * 0.5 = 197.37432487108393
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-05-12 | 170 -> 168 | 193.33 -> 197.37 |
X Russian Championship: 100% -> 86% |
| 2025-05-03 | 168 -> 170 | 193.94 -> 193.33 |
SPB Riichi Open 2023: 43% -> 29% |
| 2025-04-27 | 167 -> 168 | 193.94 | |
| 2025-04-11 | 162 -> 167 | 209.50 -> 193.94 |
Money can not buy tenpai: 29% -> 14% |
| 2025-03-30 | 163 -> 162 | 209.50 | |
| 2025-03-03 | 163 | 209.79 -> 209.50 |
SPB Riichi Open 2023: 57% -> 43% |
| 2025-03-02 | 165 -> 163 | 191.20 -> 209.79 |
Riichi Maslenitsa (shrovetide): 0% -> 100% |
| 2025-02-16 | 153 -> 165 | 191.20 | |
| 2025-02-11 | 149 -> 153 | 210.95 -> 191.20 |
Money can not buy tenpai: 43% -> 29% |
| 2025-02-02 | 142 -> 149 | 210.95 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City |
|---|---|---|---|---|---|---|---|---|
| 1 | 355 |
|
21/32 | 100% | 2.40 | RR | Riichi Maslenitsa (shrovetide) | Yekaterinburg |
| 2 | 203 |
|
64/80 | 100% | 3.65 | RR | Riichi over Volga | Samara |
| 3 | 213 |
|
38/48 | 100% | 2.80 | RR | Guardian of the Winds | Yekaterinburg |
| 4 | 103 |
|
97/108 | 86% | 4.60 | RR | X Russian Championship | Perm |
| 5 | 252 |
|
81/108 | 29% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg |
| 6 | 678 |
|
29/88 | 14% | 3.75 | RR | Money can not buy tenpai | Perm |