Grishhenko Sergei
From Korolyov, Russia
Common russian riichi rating (CRR)
Rating date May 17, 2026 (latest changes May 17, 2026).
121 place (394.03).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.45 * 1 + 3.40 * 1) = 14.85
p1 = (473.68 * 1.50 * 0.86 + 66.67 * 2 * 1 + 268.66 * 4.10 * 1 + 333.33 * 2.45 * 1 + 157.89 * 3.90 * 1 + 894.74 * 2.25 * 1 + 256.76 * 3.40 * 1 + 901.96 * 2.30 * 1) / (1.50 * 0.86 + 2 * 1 + 4.10 * 1 + 2.45 * 1 + 3.90 * 1 + 2.25 * 1 + 3.40 * 1 + 2.30 * 1) = 379.8322854053256
p2 = (901.96 * 2.30 * 1 + 894.74 * 2.25 * 1 + 268.66 * 4.10 * 1 + 256.76 * 3.40 * 1) / max_coefficients = 408.22424242424245
score = 379.8322854053256 * 0.5 + 408.22424242424245 * 0.5 = 394.028263914784
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-05-17 | 122 -> 121 | 394.49 -> 394.03 |
HaTiKo: 100% -> 86% |
| 2026-05-15 | 123 -> 122 | 394.49 | |
| 2026-05-12 | 125 -> 123 | 394.49 | |
| 2026-05-11 | 123 -> 125 | 394.49 | |
| 2026-05-03 | 123 | 393.12 -> 394.49 | |
| 2026-05-01 | 125 -> 123 | 393.12 | |
| 2026-04-19 | 120 -> 125 | 393.12 | |
| 2026-04-16 | 122 -> 120 | 393.12 | |
| 2026-04-13 | 123 -> 122 | 393.12 | |
| 2026-04-11 | 122 -> 123 | 393.12 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 902 |
|
6/52 | 100% | 2.30 | CRR | "Furin" club tournament: for the anniversary | Moscow | |
| 2 | 257 |
|
56/75 | 100% | 3.40 | RR | White Wolf Cup 2026 | Saint Petersburg | |
| 3 | 895 |
|
🥉 | 3/20 | 100% | 2.25 | RR | Winter Hatiko | Korolyov |
| 4 | 158 |
|
49/58 | 100% | 3.90 | RR | XI Russian Championship | Moscow | |
| 5 | 333 |
|
21/31 | 100% | 2.45 | RR | Agari Summer Tournament 2025 | Moscow | |
| 6 | 269 |
|
50/68 | 100% | 4.10 | RR | 13 bloody tiles | Perm | |
| 7 | 67 |
|
15/16 | 100% | 2.00 | RR | Random not fault | Moscow | |
| 8 | 474 |
|
11/20 | 86% | 1.50 | CRR | HaTiKo | Korolyov |