Kosolapov Stanislav
From Saint Petersburg, Russia
Common russian riichi rating (CRR)
Rating date April 20, 2026 (latest changes April 19, 2026).
181 place (306.87).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (657.14 * 1.90 * 1 + 246.75 * 3.45 * 1 + 800 * 1.70 * 1 + 0 + 0) / (1.90 * 1 + 3.45 * 1 + 1.70 * 1 + 1 + 1) = 382.30607734806625
p2 = (800 * 1.70 * 1 + 657.14 * 1.90 * 1 + 246.75 * 3.45 * 1) / max_coefficients = 231.4294314381271
score = 382.30607734806625 * 0.5 + 231.4294314381271 * 0.5 = 306.8677543930967
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-04-19 | 171 -> 181 | 306.87 | |
| 2026-04-11 | 246 -> 171 | 195.97 -> 306.87 |
Seihoku spring tournament 2026: 0% -> 100% |
| 2026-04-05 | 241 -> 246 | 195.97 | |
| 2026-04-04 | 242 -> 241 | 195.97 | |
| 2026-03-21 | 236 -> 242 | 195.97 | |
| 2026-03-14 | 231 -> 236 | 195.97 | |
| 2026-03-12 | 232 -> 231 | 195.97 | |
| 2026-03-10 | 233 -> 232 | 195.97 | |
| 2026-03-07 | 228 -> 233 | 195.97 | |
| 2026-03-02 | 229 -> 228 | 195.97 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 800 |
|
7/31 | 100% | 1.70 | RR | Seihoku spring tournament 2026 | Saint Petersburg | |
| 2 | 247 |
|
59/78 | 100% | 3.45 | RR | SPB Riichi Open 2025 | Saint Petersburg | |
| 3 | 657 |
|
13/36 | 100% | 1.90 | RR | Seihoku spring tournament 2025 | Saint Petersburg |