Grigoryan Andrey
From Saint Petersburg, Russia
Internal rating (RR)
Rating date June 24, 2026 (latest changes June 16, 2026).
206 place (201.82).
how we calculated rating score
max_coefficients = (4.71 * 1 + 3.90 * 1 + 4.10 * 0.86 + 3.45 * 1) = 15.574109999999997
p1 = (136.84 * 3.85 * 0.29 + 118.64 * 3.25 * 0.57 + 828.57 * 1.90 * 0.86 + 166.67 * 1.70 * 1 + 0) / (3.85 * 0.29 + 3.25 * 0.57 + 1.90 * 0.86 + 1.70 * 1 + 1) = 274.9988504540192
p2 = (828.57 * 1.90 * 0.86 + 166.67 * 1.70 * 1 + 118.64 * 3.25 * 0.57 + 136.84 * 3.85 * 0.29) / max_coefficients = 128.64298505660997
score = 274.9988504540192 * 0.5 + 128.64298505660997 * 0.5 = 201.82091775531458
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-06-16 | 206 | 198.90 -> 201.82 |
White Wolf Cup: 71% -> 57% |
| 2026-06-15 | 206 | 196.51 -> 198.90 | |
| 2026-06-14 | 183 -> 206 | 202.13 -> 196.51 | |
| 2026-06-09 | 186 -> 183 | 202.13 | |
| 2026-05-26 | 187 -> 186 | 202.13 | |
| 2026-05-17 | 186 -> 187 | 202.13 | |
| 2026-05-14 | 187 -> 186 | 202.13 | |
| 2026-05-12 | 195 -> 187 | 202.13 | |
| 2026-05-03 | 189 -> 195 | 201.66 -> 202.13 | |
| 2026-05-01 | 192 -> 189 | 199.91 -> 201.66 |
SPB Riichi Open 2024: 43% -> 29% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 167 |
|
26/31 | 100% | 1.70 | RR | Seihoku spring tournament 2026 | Saint Petersburg | |
| 2 | 829 |
|
7/36 | 86% | 1.90 | RR | Seihoku spring tournament 2025 | Saint Petersburg | |
| 3 | 119 |
|
53/60 | 57% | 3.25 | RR | White Wolf Cup | Saint Petersburg | |
| 4 | 137 |
|
83/96 | 29% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 5 | 360 |
|
49/76 | 0% | 3.45 | RR | Saint Petersburg Open 2021 | Saint Petersburg |