Grishhenko Sergei
From Korolyov, Russia
Common russian riichi rating (CRR)
Rating date June 15, 2025 (latest changes June 15, 2025).
234 place (163.50).
how we calculated rating score
max_coefficients = (4.10 * 1 + 4.60 * 0.86 + 3.85 * 1 + 3.75 * 1) = 15.64266
p1 = (268.66 * 4.10 * 1 + 473.68 * 1.50 * 1 + 66.67 * 2 * 1 + 0 + 0) / (4.10 * 1 + 1.50 * 1 + 2 * 1 + 1 + 1) = 202.640625
p2 = (268.66 * 4.10 * 1 + 473.68 * 1.50 * 1 + 66.67 * 2 * 1) / max_coefficients = 124.36184127252015
score = 202.640625 * 0.5 + 124.36184127252015 * 0.5 = 163.50123313626008
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-06-15 | 252 -> 234 | 92.68 -> 163.50 |
13 bloody tiles: 0% -> 100% |
| 2025-06-14 | 247 -> 252 | 92.68 | |
| 2025-06-11 | 252 -> 247 | 92.68 | |
| 2025-06-08 | 252 | 92.68 |
Random not fault: 0% -> 100% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City |
|---|---|---|---|---|---|---|---|---|
| 1 | 269 |
|
50/68 | 100% | 4.10 | RR | 13 bloody tiles | Perm |
| 2 | 67 |
|
15/16 | 100% | 2.00 | RR | Random not fault | Moscow |
| 3 | 474 |
|
11/20 | 100% | 1.50 | CRR | HaTiKo | Korolyov |