Grebnev Grigorii
From Saint Petersburg, Russia
Internal rating (RR)
Rating date Nov. 1, 2025 (latest changes Nov. 1, 2025).
131 place (316.71).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.25 * 1) = 14.3
p1 = (239.13 * 2.10 * 0.43 + 484.21 * 3.85 * 0.71 + 593.22 * 3.25 * 1 + 0 + 0) / (2.10 * 0.43 + 3.85 * 0.71 + 3.25 * 1 + 1 + 1) = 390.4230450954847
p2 = (593.22 * 3.25 * 1 + 484.21 * 3.85 * 0.71 + 239.13 * 2.10 * 0.43) / max_coefficients = 242.99370629370628
score = 390.4230450954847 * 0.5 + 242.99370629370628 * 0.5 = 316.7083756945955
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-11-01 | 126 -> 131 | 328.29 -> 316.71 |
SPB Riichi Open 2024: 86% -> 71% |
| 2025-10-13 | 125 -> 126 | 324.32 -> 328.29 | |
| 2025-10-09 | 126 -> 125 | 324.32 | |
| 2025-10-04 | 127 -> 126 | 324.32 | |
| 2025-09-30 | 127 | 324.34 -> 324.32 |
Seihoku spring tournament 2024: 57% -> 43% |
| 2025-09-14 | 128 -> 127 | 324.34 | |
| 2025-09-12 | 130 -> 128 | 324.34 | |
| 2025-09-03 | 118 -> 130 | 368.35 -> 324.34 |
SPB Riichi Open 2023: 14% -> 0% |
| 2025-09-01 | 114 -> 118 | 374.26 -> 368.35 |
SPB Riichi Open 2024: 100% -> 86% |
| 2025-08-31 | 108 -> 114 | 374.26 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 593 |
|
25/60 | 100% | 3.25 | RR | White Wolf Cup | Saint Petersburg | |
| 2 | 484 |
|
50/96 | 71% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 3 | 239 |
|
36/47 | 43% | 2.10 | RR | Seihoku spring tournament 2024 | Saint Petersburg | |
| 4 | 701 |
|
33/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg |