Grebnev Grigorii
From Saint Petersburg, Russia
Common russian riichi rating (CRR)
Rating date Sept. 5, 2025 (latest changes Sept. 5, 2025).
115 place (413.21).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (239.13 * 2.10 * 0.57 + 484.21 * 3.85 * 0.86 + 593.22 * 3.25 * 1 + 666.67 * 2 * 1 + 0) / (2.10 * 0.57 + 3.85 * 0.86 + 3.25 * 1 + 2 * 1 + 1) = 478.71234514210767
p2 = (593.22 * 3.25 * 1 + 484.21 * 3.85 * 0.86 + 666.67 * 2 * 1 + 239.13 * 2.10 * 0.57) / max_coefficients = 347.70608108108104
score = 478.71234514210767 * 0.5 + 347.70608108108104 * 0.5 = 413.20921311159435
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-03 | 102 -> 115 | 446.39 -> 413.21 |
SPB Riichi Open 2023: 14% -> 0% |
| 2025-09-01 | 103 -> 102 | 449.14 -> 446.39 |
SPB Riichi Open 2024: 100% -> 86% |
| 2025-08-31 | 98 -> 103 | 449.14 | |
| 2025-08-09 | 99 -> 98 | 449.14 | |
| 2025-08-04 | 99 | 447.36 -> 449.14 | |
| 2025-08-03 | 98 -> 99 | 447.36 | |
| 2025-07-30 | 100 -> 98 | 443.39 -> 447.36 |
Seihoku spring tournament 2024: 71% -> 57% |
| 2025-07-26 | 97 -> 100 | 443.39 | |
| 2025-07-13 | 94 -> 97 | 443.39 | |
| 2025-07-12 | 96 -> 94 | 440.02 -> 443.39 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 667 |
|
7/19 | 100% | 2.00 | CRR | Tonpu-master | Saint Petersburg | |
| 2 | 593 |
|
25/60 | 100% | 3.25 | RR | White Wolf Cup | Saint Petersburg | |
| 3 | 484 |
|
50/96 | 86% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 4 | 239 |
|
36/47 | 57% | 2.10 | RR | Seihoku spring tournament 2024 | Saint Petersburg | |
| 5 | 701 |
|
33/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 6 | 355 |
|
21/32 | 0% | 1.80 | CRR | Earth cup | Saint Petersburg | |
| 7 | 282 |
|
29/40 | 0% | 1.80 | CRR | Sun tournament | Saint Petersburg |