Astafev Mikhail
From Yekaterinburg, Russia
Internal rating (RR)
Rating date Sept. 5, 2025 (latest changes Sept. 3, 2025).
124 place (338.75).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (102.80 * 4.60 * 0.71 + 212.77 * 2.80 * 0.86 + 202.53 * 3.65 * 0.86 + 354.84 * 2.40 * 1 + 716.42 * 4.10 * 1) / (4.60 * 0.71 + 2.80 * 0.86 + 3.65 * 0.86 + 2.40 * 1 + 4.10 * 1) = 344.1879447501727
p2 = (716.42 * 4.10 * 1 + 354.84 * 2.40 * 1 + 202.53 * 3.65 * 0.86 + 212.77 * 2.80 * 0.86) / max_coefficients = 333.3195945945946
score = 344.1879447501727 * 0.5 + 333.3195945945946 * 0.5 = 338.75376967238367
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-03 | 128 -> 124 | 337.10 -> 338.75 |
SPB Riichi Open 2023: 14% -> 0% |
| 2025-09-01 | 129 -> 128 | 332.72 -> 337.10 | |
| 2025-08-09 | 130 -> 129 | 332.72 | |
| 2025-08-04 | 129 -> 130 | 332.37 -> 332.72 |
Riichi over Volga: 100% -> 86% |
| 2025-08-03 | 127 -> 129 | 332.37 | |
| 2025-07-30 | 126 -> 127 | 332.37 | |
| 2025-07-14 | 125 -> 126 | 333.67 -> 332.37 |
Guardian of the Winds: 100% -> 86% |
| 2025-07-13 | 122 -> 125 | 333.67 | |
| 2025-07-12 | 125 -> 122 | 326.21 -> 333.67 |
X Russian Championship: 86% -> 71% |
| 2025-07-03 | 125 | 325.06 -> 326.21 |
SPB Riichi Open 2023: 29% -> 14% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | 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 | 86% | 3.65 | RR | Riichi over Volga | Samara | |
| 4 | 213 |
|
38/48 | 86% | 2.80 | RR | Guardian of the Winds | Yekaterinburg | |
| 5 | 103 |
|
97/108 | 71% | 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 |