Karpov Alexandr
From Novosibirsk, Russia
EMA: 15020011
Online rating
Rating date Oct. 31, 2026 (latest changes Oct. 31, 2026).
74 place (234.91).
how we calculated rating score
max_coefficients = (4.45 * 0.86 + 4.45 * 0.57 + 2.20 * 1) = 8.556825
p1 = (774.65 * 3.05 * 0.29 + 451.61 * 2.20 * 1 + 0 + 0 + 0) / (3.05 * 0.29 + 2.20 * 1 + 1 + 1 + 1) = 274.8252663930882
p2 = (451.61 * 2.20 * 1 + 774.65 * 3.05 * 0.29) / max_coefficients = 194.99872908467802
score = 274.8252663930882 * 0.5 + 194.99872908467802 * 0.5 = 234.91199773888312
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2026-10-31 | 74 | 228.17 -> 234.91 | |
| 2026-10-27 | 74 | 222.30 -> 228.17 | |
| 2026-10-25 | 74 | 221.44 -> 222.30 | |
| 2026-09-21 | 76 -> 74 | 221.44 | |
| 2026-09-18 | 73 -> 76 | 255.18 -> 221.44 |
Winter online tournament 2025: 43% -> 29% |
| 2026-08-27 | 73 | 249.10 -> 255.18 | |
| 2026-07-21 | 74 -> 73 | 249.10 | |
| 2026-07-18 | 72 -> 74 | 279.70 -> 249.10 |
Winter online tournament 2025: 57% -> 43% |
| 2026-07-04 | 67 -> 72 | 279.70 | |
| 2026-06-27 | 67 | 273.40 -> 279.70 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 452 |
|
18/32 | 100% | 2.20 | ONLINE | Spring online tournament 2025 | Russia | |
| 2 | 775 |
|
17/72 | 29% | 3.05 | ONLINE | Winter online tournament 2025 | Russia | |
| 3 | 1000 |
|
🥇 | 1/40 | 0% | 2.40 | ONLINE | Winter Online Tournament | Russia |
| 4 | 586 |
|
37/88 | 0% | 3.25 | ONLINE | Winter Team Fight | Russia | |
| 5 | 273 |
|
9/12 | 0% | 1.70 | ONLINE | IORMC Qualifiers 2021 | Russia | |
| 6 | 742 |
|
9/32 | 0% | 2.20 | ONLINE | I wish to have dora san... | Russia | |
| 7 | 932 |
|
8/104 | 0% | 3.45 | ONLINE | Riichi Online Open Team Cup | Russia | |
| 8 | 12 |
|
81/82 | 0% | 3.15 | ONLINE | No Dora Tournament | Russia | |
| 9 | 851 |
|
11/68 | 0% | 3.00 | ONLINE | Winter Online Tournament | Russia | |
| 10 | 414 |
|
59/100 | 0% | 3.40 | ONLINE | Riichi Online Open Team Cup | Russia | |
| 11 | 871 |
|
5/32 | 0% | 2.20 | ONLINE | 北斗 Tournament | Russia | |
| 12 | 137 |
|
45/52 | 0% | 2.70 | ONLINE | Rainy season tournament［梅雨］ | Russia | |
| 13 | 690 |
|
23/72 | 0% | 3.05 | ONLINE | Summer Tournament | Russia | |
| 14 | 889 |
|
16/136 | 0% | 3.69 | ONLINE | Riichi Online Open Team Cup | Russia | |
| 15 | 972 |
|
4/108 | 0% | 3.50 | ONLINE | Spring tournament | Russia | |
| 16 | 878 |
|
16/124 | 0% | 3.06 | ONLINE | Be cool stay home | Russia | |
| 17 | 813 |
|
27/140 | 0% | 3.70 | ONLINE | Corona go away | Russia | |
| 18 | 175 |
|
119/144 | 0% | 3.71 | ONLINE | Riichi Online Open Team Cup 2020 | Russia | |
| 19 | 1000 |
|
🥇 | 1/41 | 0% | 2.40 | ONLINE | Autumn Online Tournament | Russia |
| 20 | 509 |
|
28/56 | 0% | 2.80 | ONLINE | Summer Online Tournament | Russia | |
| 21 | 386 |
|
52/84 | 0% | 3.20 | ONLINE | Riichi Online Open Team Cup | Russia | |
| 22 | 451 |
|
29/52 | 0% | 2.70 | ONLINE | Spring online tournament 2018 | Russia | |
| 23 | 326 |
|
30/44 | 0% | 2.30 | ONLINE | Winter online tournament 2018 | Russia | |
| 24 | 343 |
|
45/68 | 0% | 2.40 | ONLINE | Autumn riichi-blitz 2016 | Russia |