Zarezin Ivan
From Yekaterinburg, Russia
EMA: 15020003
Internal rating (RR)
Rating date Oct. 4, 2025 (latest changes Oct. 4, 2025).
92 place (435.26).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (873.42 * 3.65 * 0.71 + 808.51 * 2.80 * 0.71 + 401.87 * 4.60 * 0.57 + 0 + 0) / (3.65 * 0.71 + 2.80 * 0.71 + 4.60 * 0.57 + 1 + 1) = 536.0203775035394
p2 = (873.42 * 3.65 * 0.71 + 808.51 * 2.80 * 0.71 + 401.87 * 4.60 * 0.57) / max_coefficients = 334.4939189189189
score = 536.0203775035394 * 0.5 + 334.4939189189189 * 0.5 = 435.25714821122915
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-10-04 | 84 -> 92 | 459.65 -> 435.26 |
Riichi over Volga: 86% -> 71% |
| 2025-09-30 | 86 -> 84 | 459.65 | |
| 2025-09-14 | 79 -> 86 | 475.58 -> 459.65 |
Guardian of the Winds: 86% -> 71% |
| 2025-09-12 | 80 -> 79 | 479.57 -> 475.58 |
X Russian Championship: 71% -> 57% |
| 2025-09-10 | 81 -> 80 | 479.57 | |
| 2025-09-03 | 84 -> 81 | 479.57 | |
| 2025-09-01 | 83 -> 84 | 474.25 -> 479.57 | |
| 2025-08-31 | 76 -> 83 | 474.25 | |
| 2025-08-04 | 71 -> 76 | 494.50 -> 474.25 |
Riichi over Volga: 100% -> 86% |
| 2025-08-03 | 72 -> 71 | 494.50 |