Grishin Aleksei
From Penza, Russia
Common russian riichi rating (CRR)
Rating date Aug. 29, 2025 (latest changes Aug. 27, 2025).
219 place (199.25).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2
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 = 169.30789473684212
score = 229.19352375201666 * 0.5 + 169.30789473684212 * 0.5 = 199.2507092444294
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-08-26 | 220 -> 219 | 199.25 | |
| 2025-08-25 | 221 -> 220 | 199.25 | |
| 2025-08-04 | 217 -> 221 | 209.70 -> 199.25 |
Riichi over Volga: 100% -> 86% |
| 2025-08-03 | 213 -> 217 | 209.70 | |
| 2025-07-26 | 210 -> 213 | 209.70 | |
| 2025-07-19 | 211 -> 210 | 209.70 | |
| 2025-07-13 | 207 -> 211 | 209.70 | |
| 2025-07-12 | 208 -> 207 | 208.00 -> 209.70 | |
| 2025-07-03 | 211 -> 208 | 208.00 | |
| 2025-06-15 | 201 -> 211 | 210.65 -> 208.00 |
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 |