Astafev Mikhail
From Yekaterinburg, Russia
Internal rating (RR)
Rating date Dec. 10, 2025 (latest changes Dec. 9, 2025).
116 place (347.77).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (102.80 * 4.60 * 0.43 + 212.77 * 2.80 * 0.57 + 202.53 * 3.65 * 0.57 + 354.84 * 2.40 * 1 + 716.42 * 4.10 * 1) / (4.60 * 0.43 + 2.80 * 0.57 + 3.65 * 0.57 + 2.40 * 1 + 4.10 * 1) = 391.08125381978743
p2 = (716.42 * 4.10 * 1 + 354.84 * 2.40 * 1 + 202.53 * 3.65 * 0.57 + 212.77 * 2.80 * 0.57) / max_coefficients = 304.46354515050166
score = 391.08125381978743 * 0.5 + 304.46354515050166 * 0.5 = 347.77239948514455
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-12-09 | 117 -> 116 | 347.77 | |
| 2025-12-07 | 115 -> 117 | 347.77 | |
| 2025-12-04 | 117 -> 115 | 347.43 -> 347.77 |
Riichi over Volga: 71% -> 57% |
| 2025-11-30 | 116 -> 117 | 347.43 | |
| 2025-11-14 | 117 -> 116 | 347.67 -> 347.43 |
Guardian of the Winds: 71% -> 57% |
| 2025-11-12 | 122 -> 117 | 341.08 -> 347.67 |
X Russian Championship: 57% -> 43% |
| 2025-11-04 | 118 -> 122 | 348.29 -> 341.08 | |
| 2025-11-01 | 118 | 347.72 -> 348.29 | |
| 2025-10-13 | 119 -> 118 | 342.69 -> 347.72 | |
| 2025-10-04 | 120 -> 119 | 343.29 -> 342.69 |
Riichi over Volga: 86% -> 71% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 716 |
|
20/68 | 100% | 4.10 | RR | 13 bloody tiles | Perm | |
| 2 | 355 |
|
21/32 | 100% | 2.40 | RR | Riichi Maslenitsa (shrovetide) | Yekaterinburg | |
| 3 | 203 |
|
64/80 | 57% | 3.65 | RR | Riichi over Volga | Samara | |
| 4 | 213 |
|
38/48 | 57% | 2.80 | RR | Guardian of the Winds | Yekaterinburg | |
| 5 | 103 |
|
97/108 | 43% | 4.60 | RR | X Russian Championship | Perm | |
| 6 | 252 |
|
81/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 7 | 678 |
|
29/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm |