Grebnev Grigorii
From Saint Petersburg, Russia
Common russian riichi rating (CRR)
Rating date Jan. 3, 2025 (latest changes Jan. 3, 2025).
114 place (341.90).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (354.84 * 1.80 * 0.14 + 700.93 * 4 * 0.57 + 239.13 * 2.10 * 1 + 484.21 * 3.85 * 1 + 0) / (1.80 * 0.14 + 4 * 0.57 + 2.10 * 1 + 3.85 * 1 + 1) = 427.66111650700213
p2 = (484.21 * 3.85 * 1 + 700.93 * 4 * 0.57 + 239.13 * 2.10 * 1 + 354.84 * 1.80 * 0.14) / max_coefficients = 256.1331230283912
score = 427.66111650700213 * 0.5 + 256.1331230283912 * 0.5 = 341.89711976769667
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-01-03 | 108 -> 114 | 362.30 -> 341.90 |
SPB Riichi Open 2023: 71% -> 57% |
| 2024-12-25 | 108 | 364.07 -> 362.30 |
Earth cup: 29% -> 14% |
| 2024-12-18 | 110 -> 108 | 364.07 | |
| 2024-12-11 | 111 -> 110 | 364.07 | |
| 2024-12-01 | 110 -> 111 | 364.07 | |
| 2024-11-05 | 115 -> 110 | 364.07 | |
| 2024-11-04 | 114 -> 115 | 364.07 | |
| 2024-11-03 | 107 -> 114 | 383.52 -> 364.07 |
SPB Riichi Open 2023: 86% -> 71% |
| 2024-10-25 | 107 | 385.25 -> 383.52 |
Earth cup: 43% -> 29% |
| 2024-10-22 | 108 -> 107 | 385.25 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 484 |
|
50/96 | 100% | 3.85 | RR | SPB Riichi Open 2024 |
| 2 | 239 |
|
36/47 | 100% | 2.10 | RR | Seihoku spring tournament 2024 |
| 3 | 701 |
|
33/108 | 57% | 4.00 | RR | SPB Riichi Open 2023 |
| 4 | 355 |
|
21/32 | 14% | 1.80 | CRR | Earth cup |
| 5 | 282 |
|
29/40 | 0% | 1.80 | CRR | Sun tournament |