Nemchinova Alena
From Samara, Russia
Internal rating (RR)
Rating date Aug. 4, 2025 (latest changes Aug. 4, 2025).
24 place (681.05).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.85 * 1 + 3.75 * 1 + 3.50 * 1) = 15.2
p1 = (710.28 * 4 * 0.14 + 420.56 * 4.60 * 0.71 + 893.62 * 2.80 * 0.86 + 405.06 * 3.65 * 0.86 + 494.38 * 3.75 * 1 + 1000 * 3.25 * 1 + 500 * 3.50 * 1 + 835.82 * 4.10 * 1 + 674.42 * 3 * 1) / (4 * 0.14 + 4.60 * 0.71 + 2.80 * 0.86 + 3.65 * 0.86 + 3.75 * 1 + 3.25 * 1 + 3.50 * 1 + 4.10 * 1 + 3 * 1) = 648.6296896408927
p2 = (835.82 * 4.10 * 1 + 1000 * 3.25 * 1 + 893.62 * 2.80 * 0.86 + 674.42 * 3 * 1) / max_coefficients = 713.467105263158
score = 648.6296896408927 * 0.5 + 713.467105263158 * 0.5 = 681.0483974520254
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-08-04 | 25 -> 24 | 675.25 -> 681.05 |
Riichi over Volga: 100% -> 86% |
| 2025-08-03 | 32 -> 25 | 640.59 -> 675.25 |
Two roosters and Chuckles: 0% -> 100% |
| 2025-07-14 | 30 -> 32 | 654.48 -> 640.59 |
Guardian of the Winds: 100% -> 86% |
| 2025-07-12 | 32 -> 30 | 645.78 -> 654.48 |
X Russian Championship: 86% -> 71% |
| 2025-07-03 | 32 | 647.01 -> 645.78 |
SPB Riichi Open 2023: 29% -> 14% |
| 2025-06-15 | 45 -> 32 | 581.71 -> 647.01 |
13 bloody tiles: 0% -> 100% |
| 2025-06-11 | 46 -> 45 | 581.71 | |
| 2025-05-12 | 45 -> 46 | 573.11 -> 581.71 |
X Russian Championship: 100% -> 86% |
| 2025-05-03 | 44 -> 45 | 578.70 -> 573.11 |
SPB Riichi Open 2023: 43% -> 29% Riichi over The Volga 2025: 0% -> 100% |
| 2025-04-26 | 42 -> 44 | 578.70 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 674 |
|
15/44 | 100% | 3.00 | RR | Two roosters and Chuckles | Kirov | |
| 2 | 836 |
|
12/68 | 100% | 4.10 | RR | 13 bloody tiles | Perm | |
| 3 | 500 |
|
36/71 | 100% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
| 4 | 1000 |
|
🥇 | 1/60 | 100% | 3.25 | RR | White Wolf Cup | Saint Petersburg |
| 5 | 71 |
|
40/43 | 100% | 2.60 | RR | Riichi On Ice | Samara | |
| 6 | 494 |
|
46/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 7 | 405 |
|
48/80 | 86% | 3.65 | RR | Riichi over Volga | Samara | |
| 8 | 894 |
|
6/48 | 86% | 2.80 | RR | Guardian of the Winds | Yekaterinburg | |
| 9 | 421 |
|
63/108 | 71% | 4.60 | RR | X Russian Championship | Perm | |
| 10 | 710 |
|
32/108 | 14% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg |