USHAKOV Igor
From Moscow, Russia
EMA: 15990490
Common russian riichi rating (CRR)
Rating date Nov. 1, 2025 (latest changes Nov. 1, 2025).
210 place (199.67).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.25 * 1) = 14.3
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 = 158.89790209790206
score = 240.44867724867726 * 0.5 + 158.89790209790206 * 0.5 = 199.67328967328967
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-11-01 | 211 -> 210 | 199.40 -> 199.67 | |
| 2025-10-13 | 210 -> 211 | 196.99 -> 199.40 | |
| 2025-10-09 | 211 -> 210 | 196.99 | |
| 2025-10-04 | 213 -> 211 | 196.99 | |
| 2025-09-30 | 214 -> 213 | 196.99 | |
| 2025-09-19 | 215 -> 214 | 196.99 | |
| 2025-09-12 | 216 -> 215 | 196.99 | |
| 2025-09-05 | 217 -> 216 | 196.99 | |
| 2025-09-03 | 222 -> 217 | 196.99 | |
| 2025-09-01 | 222 | 194.97 -> 196.99 |
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 |