Nemchinova Alena
From Samara, Russia
Internal rating (RR)
Rating date Sept. 6, 2025 (latest changes Sept. 3, 2025).
27 place (670.64).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (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 + 311.69 * 3.45 * 1) / (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 + 3.45 * 1) = 608.5247910742255
p2 = (835.82 * 4.10 * 1 + 1000 * 3.25 * 1 + 893.62 * 2.80 * 0.86 + 674.42 * 3 * 1) / max_coefficients = 732.75
score = 608.5247910742255 * 0.5 + 732.75 * 0.5 = 670.6373955371128
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-03 | 28 -> 27 | 671.59 -> 670.64 |
SPB Riichi Open 2023: 14% -> 0% |
| 2025-09-01 | 30 -> 28 | 661.95 -> 671.59 | |
| 2025-08-31 | 23 -> 30 | 681.05 -> 661.95 |
SPB Riichi Open 2025: 0% -> 100% |
| 2025-08-09 | 24 -> 23 | 681.05 | |
| 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% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 312 |
|
54/78 | 100% | 3.45 | RR | SPB Riichi Open 2025 | Saint Petersburg | |
| 2 | 674 |
|
15/44 | 100% | 3.00 | RR | Two roosters and Chuckles | Kirov | |
| 3 | 836 |
|
12/68 | 100% | 4.10 | RR | 13 bloody tiles | Perm | |
| 4 | 500 |
|
36/71 | 100% | 3.50 | RR | Riichi over The Volga 2025 | Samara | |
| 5 | 1000 |
|
🥇 | 1/60 | 100% | 3.25 | RR | White Wolf Cup | Saint Petersburg |
| 6 | 71 |
|
40/43 | 100% | 2.60 | RR | Riichi On Ice | Samara | |
| 7 | 494 |
|
46/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 8 | 405 |
|
48/80 | 86% | 3.65 | RR | Riichi over Volga | Samara | |
| 9 | 894 |
|
6/48 | 86% | 2.80 | RR | Guardian of the Winds | Yekaterinburg | |
| 10 | 421 |
|
63/108 | 71% | 4.60 | RR | X Russian Championship | Perm | |
| 11 | 710 |
|
32/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg |