USHAKOV Igor
From Moscow, Russia
EMA: 15990490
Internal rating (RR)
Rating date Sept. 4, 2025 (latest changes Sept. 3, 2025).
178 place (196.99).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (697.67 * 3 * 1 + 51.95 * 3.45 * 1 + 0 + 0 + 0) / (3 * 1 + 3.45 * 1 + 1 + 1 + 1) = 240.44867724867726
p2 = (697.67 * 3 * 1 + 51.95 * 3.45 * 1) / max_coefficients = 153.5297297297297
score = 240.44867724867726 * 0.5 + 153.5297297297297 * 0.5 = 196.98920348920348
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-03 | 182 -> 178 | 196.99 | |
| 2025-09-01 | 182 | 194.97 -> 196.99 | |
| 2025-08-31 | 182 | 194.97 |
SPB Riichi Open 2025: 0% -> 100% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 52 |
|
74/78 | 100% | 3.45 | RR | SPB Riichi Open 2025 | Saint Petersburg | |
| 2 | 698 |
|
14/44 | 100% | 3.00 | RR | Two roosters and Chuckles | Kirov |