Astafev Mikhail
From Yekaterinburg, Russia
Common russian riichi rating (CRR)
Rating date Nov. 1, 2025 (latest changes Nov. 1, 2025).
131 place (355.32).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.25 * 1) = 14.3
p1 = (592.59 * 2.30 * 0.14 + 629.63 * 2.30 * 0.29 + 333.33 * 1.60 * 0.57 + 102.80 * 4.60 * 0.57 + 212.77 * 2.80 * 0.71 + 202.53 * 3.65 * 0.71 + 354.84 * 2.40 * 1 + 716.42 * 4.10 * 1) / (2.30 * 0.14 + 2.30 * 0.29 + 1.60 * 0.57 + 4.60 * 0.57 + 2.80 * 0.71 + 3.65 * 0.71 + 2.40 * 1 + 4.10 * 1) = 379.0026602591059
p2 = (716.42 * 4.10 * 1 + 354.84 * 2.40 * 1 + 202.53 * 3.65 * 0.71 + 212.77 * 2.80 * 0.71) / max_coefficients = 331.64335664335664
score = 379.0026602591059 * 0.5 + 331.64335664335664 * 0.5 = 355.32300845123126
Rating changes
| Date | Place | Points | Reason | 
|---|---|---|---|
| 2025-11-01 | 131 | 354.75 -> 355.32 | |
| 2025-10-25 | 127 -> 131 | 364.13 -> 354.75 | 
                        
                             Chasing Kan: 43% -> 29%  | 
                
| 2025-10-13 | 129 -> 127 | 358.89 -> 364.13 | |
| 2025-10-09 | 128 -> 129 | 358.89 | |
| 2025-10-04 | 131 -> 128 | 359.59 -> 358.89 | 
                        
                             Riichi over Volga: 86% -> 71%  | 
                
| 2025-09-14 | 132 -> 131 | 357.63 -> 359.59 | 
                        
                             Guardian of the Winds: 86% -> 71%  | 
                
| 2025-09-12 | 137 -> 132 | 352.54 -> 357.63 | 
                        
                             X Russian Championship: 71% -> 57%  | 
                
| 2025-09-05 | 137 | 354.41 -> 352.54 | 
                        
                             Finding Dora: 29% -> 14% Akademgorodok: Riichi Mahjong Tournament 2024: 71% -> 57%  | 
                
| 2025-09-03 | 138 -> 137 | 352.64 -> 354.41 | 
                        
                             SPB Riichi Open 2023: 14% -> 0%  | 
                
| 2025-09-01 | 140 -> 138 | 348.16 -> 352.64 | 
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 | 71% | 3.65 | RR | Riichi over Volga | Samara | |
| 4 | 213 | 
                     | 
                38/48 | 71% | 2.80 | RR | Guardian of the Winds | Yekaterinburg | |
| 5 | 103 | 
                     | 
                97/108 | 57% | 4.60 | RR | X Russian Championship | Perm | |
| 6 | 333 | 
                     | 
                11/16 | 57% | 1.60 | CRR | Akademgorodok: Riichi Mahjong Tournament 2024 | Novosibirsk | |
| 7 | 630 | 
                     | 
                11/28 | 29% | 2.30 | CRR | Chasing Kan | Yekaterinburg | |
| 8 | 593 | 
                     | 
                12/28 | 14% | 2.30 | CRR | Finding Dora | Yekaterinburg | |
| 9 | 252 | 
                     | 
                81/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 10 | 368 | 
                     | 
                13/20 | 0% | 2.10 | CRR | 13 tiles until tempai | Yekaterinburg | |
| 11 | 678 | 
                     | 
                29/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm |