Kosolapov Stanislav
From Saint Petersburg, Russia
Common russian riichi rating (CRR)
Rating date Dec. 10, 2025 (latest changes Dec. 9, 2025).
223 place (195.97).
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 + 0 + 0 + 0) / (1.90 * 1 + 3.45 * 1 + 1 + 1 + 1) = 251.4814371257485
p2 = (657.14 * 1.90 * 1 + 246.75 * 3.45 * 1) / max_coefficients = 140.45953177257525
score = 251.4814371257485 * 0.5 + 140.45953177257525 * 0.5 = 195.97048444916186
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-12-09 | 224 -> 223 | 195.97 | |
| 2025-12-07 | 219 -> 224 | 195.97 | |
| 2025-12-06 | 217 -> 219 | 195.97 | |
| 2025-12-04 | 219 -> 217 | 195.97 | |
| 2025-11-30 | 220 -> 219 | 195.97 | |
| 2025-11-25 | 221 -> 220 | 195.97 | |
| 2025-11-22 | 219 -> 221 | 195.97 | |
| 2025-11-12 | 220 -> 219 | 195.97 | |
| 2025-11-04 | 211 -> 220 | 199.16 -> 195.97 | |
| 2025-11-01 | 212 -> 211 | 198.91 -> 199.16 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 247 |
|
59/78 | 100% | 3.45 | RR | SPB Riichi Open 2025 | Saint Petersburg | |
| 2 | 657 |
|
13/36 | 100% | 1.90 | RR | Seihoku spring tournament 2025 | Saint Petersburg |