Grebnev Grigorii
From Saint Petersburg, Russia
Common russian riichi rating (CRR)
Rating date July 10, 2025 (latest changes July 10, 2025).
96 place (440.02).
how we calculated rating score
max_coefficients = (4.10 * 1 + 4.60 * 0.86 + 3.85 * 1 + 3.75 * 1) = 15.64266
p1 = (700.93 * 4 * 0.14 + 239.13 * 2.10 * 0.71 + 484.21 * 3.85 * 1 + 593.22 * 3.25 * 1 + 666.67 * 2 * 1) / (4 * 0.14 + 2.10 * 0.71 + 3.85 * 1 + 3.25 * 1 + 2 * 1) = 526.7682513652886
p2 = (593.22 * 3.25 * 1 + 484.21 * 3.85 * 1 + 666.67 * 2 * 1 + 700.93 * 4 * 0.14) / max_coefficients = 353.2749545154085
score = 526.7682513652886 * 0.5 + 353.2749545154085 * 0.5 = 440.02160294034854
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-07-03 | 91 -> 96 | 457.06 -> 440.02 |
SPB Riichi Open 2023: 29% -> 14% |
| 2025-06-15 | 87 -> 91 | 462.67 -> 457.06 | |
| 2025-06-14 | 112 -> 87 | 393.45 -> 462.67 |
Tonpu-master: 0% -> 100% |
| 2025-06-11 | 113 -> 112 | 393.45 | |
| 2025-05-30 | 113 | 392.79 -> 393.45 |
Seihoku spring tournament 2024: 86% -> 71% |
| 2025-05-19 | 114 -> 113 | 392.79 | |
| 2025-05-17 | 111 -> 114 | 392.79 | |
| 2025-05-12 | 112 -> 111 | 385.94 -> 392.79 | |
| 2025-05-03 | 99 -> 112 | 404.63 -> 385.94 |
SPB Riichi Open 2023: 43% -> 29% |
| 2025-04-27 | 96 -> 99 | 404.63 |
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 | 100% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 4 | 239 |
|
36/47 | 71% | 2.10 | RR | Seihoku spring tournament 2024 | Saint Petersburg | |
| 5 | 701 |
|
33/108 | 14% | 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 |