Demurchev Mikhail
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Sept. 4, 2025 (latest changes Sept. 3, 2025).
101 place (441.79).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (470.59 * 3.05 * 0.57 + 261.68 * 4.60 * 0.71 + 980.39 * 3.05 * 0.71 + 278.48 * 3.65 * 0.86 + 757.89 * 3.85 * 0.86 + 224.72 * 3.75 * 1 + 333.33 * 3.05 * 1) / (3.05 * 0.57 + 4.60 * 0.71 + 3.05 * 0.71 + 3.65 * 0.86 + 3.85 * 0.86 + 3.75 * 1 + 3.05 * 1) = 442.72944787272473
p2 = (757.89 * 3.85 * 0.86 + 980.39 * 3.05 * 0.71 + 333.33 * 3.05 * 1 + 278.48 * 3.65 * 0.86) / max_coefficients = 440.85810810810807
score = 442.72944787272473 * 0.5 + 440.85810810810807 * 0.5 = 441.7937779904164
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-03 | 105 -> 101 | 441.79 | |
| 2025-09-01 | 98 -> 105 | 453.84 -> 441.79 |
SPB Riichi Open 2024: 100% -> 86% |
| 2025-08-31 | 95 -> 98 | 453.84 | |
| 2025-08-09 | 83 -> 95 | 473.27 -> 453.84 |
Agari Summer Tournament 2024: 86% -> 71% |
| 2025-08-04 | 85 -> 83 | 473.45 -> 473.27 |
Riichi over Volga: 100% -> 86% |
| 2025-08-03 | 84 -> 85 | 473.45 | |
| 2025-07-30 | 85 -> 84 | 473.45 | |
| 2025-07-26 | 84 -> 85 | 473.45 | |
| 2025-07-14 | 83 -> 84 | 473.45 | |
| 2025-07-13 | 82 -> 83 | 473.45 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 333 |
|
35/52 | 100% | 3.05 | RR | Agari Winter Tournament 2025 | Moscow | |
| 2 | 225 |
|
70/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 3 | 758 |
|
24/96 | 86% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 4 | 278 |
|
58/80 | 86% | 3.65 | RR | Riichi over Volga | Samara | |
| 5 | 980 |
|
🥈 | 2/52 | 71% | 3.05 | RR | Agari Summer Tournament 2024 | Moscow |
| 6 | 262 |
|
80/108 | 71% | 4.60 | RR | X Russian Championship | Perm | |
| 7 | 471 |
|
28/52 | 57% | 3.05 | RR | Agari Spring Tournament 2024 | Moscow |