Grigoryan Andrey
From Saint Petersburg, Russia
Common russian riichi rating (CRR)
Rating date May 12, 2025 (latest changes May 12, 2025).
212 place (194.87).
how we calculated rating score
max_coefficients = (4.60 * 0.86 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.19266
p1 = (136.84 * 3.85 * 1 + 118.64 * 3.25 * 1 + 828.57 * 1.90 * 1 + 0 + 0) / (3.85 * 1 + 3.25 * 1 + 1.90 * 1 + 1 + 1) = 226.06545454545457
p2 = (828.57 * 1.90 * 1 + 136.84 * 3.85 * 1 + 118.64 * 3.25 * 1) / max_coefficients = 163.67903974682514
score = 226.06545454545457 * 0.5 + 163.67903974682514 * 0.5 = 194.87224714613984
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-05-12 | 212 | 191.48 -> 194.87 | |
| 2025-05-03 | 210 -> 212 | 191.48 | |
| 2025-04-27 | 205 -> 210 | 191.48 | |
| 2025-04-26 | 244 -> 205 | 73.95 -> 191.48 |
Seihoku spring tournament 2025: 0% -> 100% |
| 2025-04-22 | 246 -> 244 | 78.58 -> 73.95 |
Fire cup 2023: 14% -> 0% |
| 2025-04-13 | 243 -> 246 | 78.58 | |
| 2025-03-29 | 237 -> 243 | 78.58 | |
| 2025-03-23 | 225 -> 237 | 78.58 | |
| 2025-03-02 | 224 -> 225 | 78.58 | |
| 2025-02-27 | 225 -> 224 | 78.58 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 829 |
|
7/36 | 100% | 1.90 | RR | Seihoku spring tournament 2025 | Saint Petersburg | |
| 2 | 119 |
|
53/60 | 100% | 3.25 | RR | White Wolf Cup | Saint Petersburg | |
| 3 | 137 |
|
83/96 | 100% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 4 | 43 |
|
23/24 | 0% | 1.40 | CRR | Fire cup 2023 | Saint Petersburg | |
| 5 | 548 |
|
15/32 | 0% | 1.80 | CRR | Earth cup | Saint Petersburg | |
| 6 | 538 |
|
19/40 | 0% | 1.80 | CRR | Sun tournament | Saint Petersburg | |
| 7 | 360 |
|
49/76 | 0% | 3.45 | RR | Saint Petersburg Open 2021 | Saint Petersburg |