Grishin Aleksei
From Penza, Russia
Internal rating (RR)
Rating date Sept. 5, 2025 (latest changes Sept. 3, 2025).
174 place (201.54).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (417.72 * 3.65 * 0.86 + 333.33 * 2.60 * 1 + 114.29 * 3.50 * 1 + 0 + 0) / (3.65 * 0.86 + 2.60 * 1 + 3.50 * 1 + 1 + 1) = 229.19352375201666
p2 = (417.72 * 3.65 * 0.86 + 333.33 * 2.60 * 1 + 114.29 * 3.50 * 1) / max_coefficients = 173.88378378378377
score = 229.19352375201666 * 0.5 + 173.88378378378377 * 0.5 = 201.5386537679002
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-03 | 179 -> 174 | 201.54 | |
| 2025-09-01 | 178 -> 179 | 199.25 -> 201.54 | |
| 2025-08-31 | 175 -> 178 | 199.25 | |
| 2025-08-04 | 175 | 209.70 -> 199.25 |
Riichi over Volga: 100% -> 86% |
| 2025-08-03 | 169 -> 175 | 209.70 | |
| 2025-07-13 | 166 -> 169 | 209.70 | |
| 2025-07-12 | 167 -> 166 | 208.00 -> 209.70 | |
| 2025-07-03 | 168 -> 167 | 208.00 | |
| 2025-06-15 | 154 -> 168 | 210.65 -> 208.00 | |
| 2025-06-11 | 162 -> 154 | 210.65 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 114 |
|
63/71 | 100% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
| 2 | 333 |
|
29/43 | 100% | 2.60 | RR | Riichi On Ice | Samara | |
| 3 | 418 |
|
47/80 | 86% | 3.65 | RR | Riichi over Volga | Samara | |
| 4 | 870 |
|
4/24 | 0% | 2.50 | RR | Toi-Toi-man Tournament | Kirov |