Zarezin Ivan
From Yekaterinburg, Russia
EMA: 15020003
Common russian riichi rating (CRR)
Rating date Sept. 2, 2023 (latest changes Sept. 2, 2023).
41 place (443.53).
how we calculated rating score
max_coefficients = (4.20 * 1 + 3.75 * 1 + 4.05 * 0.71 + 2.80 * 1) = 13.642914999999999
p1 = (358.21 * 3.50 * 0.57 + 440 * 4.20 * 1 + 540.23 * 3.75 * 1 + 631.58 * 2.10 * 1 + 0) / (3.50 * 0.57 + 4.20 * 1 + 3.75 * 1 + 2.10 * 1 + 1) = 453.37971938482286
p2 = (540.23 * 3.75 * 1 + 440 * 4.20 * 1 + 631.58 * 2.10 * 1 + 358.21 * 3.50 * 0.57) / max_coefficients = 433.6727158382208
score = 453.37971938482286 * 0.5 + 433.6727158382208 * 0.5 = 443.5262176115218
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2023-09-01 | 57 -> 41 | 390.54 -> 443.53 | |
| 2021-02-01 | 70 -> 57 | 496.26 -> 390.54 | |
| 2020-02-01 | 70 | 496.26 |