Grishhenko Sergei
From Korolyov, Russia
Common russian riichi rating (CRR)
Rating date Dec. 10, 2025 (latest changes Dec. 9, 2025).
155 place (321.63).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (473.68 * 1.50 * 1 + 66.67 * 2 * 1 + 268.66 * 4.10 * 1 + 333.33 * 2.45 * 1 + 157.89 * 3.90 * 1 + 894.74 * 2.25 * 1) / (1.50 * 1 + 2 * 1 + 4.10 * 1 + 2.45 * 1 + 3.90 * 1 + 2.25 * 1) = 332.7759259259259
p2 = (894.74 * 2.25 * 1 + 268.66 * 4.10 * 1 + 333.33 * 2.45 * 1 + 473.68 * 1.50 * 1) / max_coefficients = 310.49163879598666
score = 332.7759259259259 * 0.5 + 310.49163879598666 * 0.5 = 321.6337823609563
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-12-07 | 200 -> 155 | 229.58 -> 321.63 |
Winter Hatiko: 0% -> 100% |
| 2025-12-06 | 197 -> 200 | 229.58 | |
| 2025-11-30 | 198 -> 197 | 229.58 | |
| 2025-11-25 | 199 -> 198 | 229.58 | |
| 2025-11-22 | 197 -> 199 | 229.58 | |
| 2025-11-14 | 198 -> 197 | 229.58 | |
| 2025-11-12 | 200 -> 198 | 229.58 | |
| 2025-11-04 | 198 -> 200 | 221.55 -> 229.58 |
XI Russian Championship: 0% -> 100% |
| 2025-11-01 | 198 | 221.22 -> 221.55 | |
| 2025-10-22 | 199 -> 198 | 221.22 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 895 |
|
🥉 | 3/20 | 100% | 2.25 | RR | Winter Hatiko | Korolyov |
| 2 | 158 |
|
49/58 | 100% | 3.90 | RR | XI Russian Championship | Moscow | |
| 3 | 333 |
|
21/31 | 100% | 2.45 | RR | Agari Summer Tournament 2025 | Moscow | |
| 4 | 269 |
|
50/68 | 100% | 4.10 | RR | 13 bloody tiles | Perm | |
| 5 | 67 |
|
15/16 | 100% | 2.00 | RR | Random not fault | Moscow | |
| 6 | 474 |
|
11/20 | 100% | 1.50 | CRR | HaTiKo | Korolyov |