Astafev Mikhail
From Yekaterinburg, Russia
Internal rating (RR)
Rating date Jan. 3, 2025 (latest changes Jan. 3, 2025).
130 place (210.95).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (678.16 * 3.75 * 0.43 + 252.34 * 4 * 0.57 + 102.80 * 4.60 * 1 + 212.77 * 2.80 * 1 + 202.53 * 3.65 * 1) / (3.75 * 0.43 + 4 * 0.57 + 4.60 * 1 + 2.80 * 1 + 3.65 * 1) = 232.52525455318093
p2 = (678.16 * 3.75 * 0.43 + 202.53 * 3.65 * 1 + 212.77 * 2.80 * 1 + 252.34 * 4 * 0.57) / max_coefficients = 189.38107255520504
score = 232.52525455318093 * 0.5 + 189.38107255520504 * 0.5 = 210.953163554193
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-01-03 | 130 | 215.87 -> 210.95 |
SPB Riichi Open 2023: 71% -> 57% |
| 2024-12-11 | 123 -> 130 | 234.75 -> 215.87 |
Money can not buy tenpai: 57% -> 43% |
| 2024-11-06 | 131 -> 123 | 234.75 | |
| 2024-11-03 | 130 -> 131 | 239.37 -> 234.75 |
SPB Riichi Open 2023: 86% -> 71% |
| 2024-10-13 | 121 -> 130 | 241.75 -> 239.37 | |
| 2024-10-11 | 118 -> 121 | 260.17 -> 241.75 |
Money can not buy tenpai: 71% -> 57% |
| 2024-09-06 | 119 -> 118 | 260.17 | |
| 2024-09-03 | 119 | 259.91 -> 260.17 |
SPB Riichi Open 2023: 100% -> 86% |
| 2024-09-01 | 108 -> 119 | 266.66 -> 259.91 | |
| 2024-08-11 | 105 -> 108 | 283.07 -> 266.66 |
Money can not buy tenpai: 86% -> 71% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 203 |
|
64/80 | 100% | 3.65 | RR | Riichi over Volga |
| 2 | 213 |
|
38/48 | 100% | 2.80 | RR | Guardian of the Winds |
| 3 | 103 |
|
97/108 | 100% | 4.60 | RR | X Russian Championship |
| 4 | 252 |
|
81/108 | 57% | 4.00 | RR | SPB Riichi Open 2023 |
| 5 | 678 |
|
29/88 | 43% | 3.75 | RR | Money can not buy tenpai |