Sychev Ivan
From Saint Petersburg, Russia
EMA: 15990298
Common russian riichi rating (CRR)
Rating date Sept. 1, 2025 (latest changes Sept. 1, 2025).
241 place (173.15).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (897.20 * 4 * 0.14 + 444.44 * 2 * 1 + 0 + 0 + 0) / (4 * 0.14 + 2 * 1 + 1 + 1 + 1) = 251.58482303108622
p2 = (444.44 * 2 * 1 + 897.20 * 4 * 0.14) / max_coefficients = 94.71148648648648
score = 251.58482303108622 * 0.5 + 94.71148648648648 * 0.5 = 173.14815475878635
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-01 | 241 | 171.90 -> 173.15 | |
| 2025-08-31 | 237 -> 241 | 171.90 | |
| 2025-08-25 | 238 -> 237 | 171.90 | |
| 2025-08-22 | 239 -> 238 | 171.90 | |
| 2025-08-04 | 239 | 171.45 -> 171.90 | |
| 2025-08-03 | 233 -> 239 | 171.45 | |
| 2025-07-26 | 231 -> 233 | 171.45 | |
| 2025-07-19 | 232 -> 231 | 171.45 | |
| 2025-07-13 | 228 -> 232 | 171.45 | |
| 2025-07-12 | 229 -> 228 | 170.60 -> 171.45 |