Ermolaev Alexey
From Kirov, Russia
EMA: 15990340
Common russian riichi rating (CRR)
Rating date Oct. 13, 2025 (latest changes Oct. 13, 2025).
15 place (730.77).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.85 * 0.86) = 14.349835
p1 = (897.20 * 4.60 * 0.57 + 747.37 * 3.85 * 0.86 + 608.70 * 2.80 * 1 + 1000 * 1.50 * 1 + 193.55 * 3.10 * 1 + 971.43 * 3.50 * 1 + 671.64 * 4.10 * 1 + 627.91 * 3 * 1) / (4.60 * 0.57 + 3.85 * 0.86 + 2.80 * 1 + 1.50 * 1 + 3.10 * 1 + 3.50 * 1 + 4.10 * 1 + 3 * 1) = 696.5073746435964
p2 = (971.43 * 3.50 * 1 + 671.64 * 4.10 * 1 + 747.37 * 3.85 * 0.86 + 897.20 * 4.60 * 0.57) / max_coefficients = 765.0366711533617
score = 696.5073746435964 * 0.5 + 765.0366711533617 * 0.5 = 730.772022898479
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-10-13 | 15 | 719.14 -> 730.77 | |
| 2025-09-12 | 12 -> 15 | 741.74 -> 719.14 |
X Russian Championship: 71% -> 57% |
| 2025-09-03 | 12 | 740.78 -> 741.74 |
SPB Riichi Open 2023: 14% -> 0% |
| 2025-09-01 | 11 -> 12 | 744.53 -> 740.78 |
SPB Riichi Open 2024: 100% -> 86% |
| 2025-08-31 | 8 -> 11 | 744.53 | |
| 2025-08-25 | 5 -> 8 | 776.67 -> 744.53 | |
| 2025-08-04 | 5 | 772.82 -> 776.67 | |
| 2025-08-03 | 7 -> 5 | 743.09 -> 772.82 |
Two roosters and Chuckles: 0% -> 100% |
| 2025-07-12 | 5 -> 7 | 757.30 -> 743.09 |
X Russian Championship: 86% -> 71% |
| 2025-07-03 | 5 | 756.18 -> 757.30 |
SPB Riichi Open 2023: 29% -> 14% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 628 |
|
17/44 | 100% | 3.00 | RR | Two roosters and Chuckles | Kirov | |
| 2 | 672 |
|
23/68 | 100% | 4.10 | RR | 13 bloody tiles | Perm | |
| 3 | 971 |
|
🥉 | 3/71 | 100% | 3.50 | RR | Riichi over The Volga 2025 | Samara |
| 4 | 194 |
|
26/32 | 100% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 5 | 1000 |
|
🥇 | 1/20 | 100% | 1.50 | CRR | Dirty Riichi | Kirov |
| 6 | 609 |
|
10/24 | 100% | 2.80 | CRR | Riichi never changing | Moscow | |
| 7 | 747 |
|
25/96 | 86% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 8 | 897 |
|
12/108 | 57% | 4.60 | RR | X Russian Championship | Perm | |
| 9 | 617 |
|
42/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 10 | 67 |
|
15/16 | 0% | 1.20 | CRR | Riichi or die | Kirov | |
| 11 | 356 |
|
57/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
| 12 | 478 |
|
13/24 | 0% | 2.80 | CRR | Meeting in the billiard room | Moscow | |
| 13 | 507 |
|
38/76 | 0% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 14 | 333 |
|
11/16 | 0% | 1.20 | CRR | Vyatka rooster | Kirov | |
| 15 | 909 |
|
6/56 | 0% | 3.30 | RR | Kirov Tournament | Kirov | |
| 16 | 205 |
|
32/40 | 0% | 2.90 | EMA | Big open chiitoitsu in a small tenpai | Kirov | |
| 17 | 279 |
|
81/112 | 0% | 4.05 | EMA | VIII Russian Riichi Championship | Moscow | |
| 18 | 556 |
|
29/64 | 0% | 3.85 | EMA | Aki Shanten 2019 | Perm | |
| 19 | 889 |
|
4/28 | 0% | 2.60 | RR | And yet the sinner collects tanyao | Kirov | |
| 20 | 114 |
|
32/36 | 0% | 3.20 | RR | Moscow Open Riichi Marathon 2019 | Moscow | |
| 21 | 843 |
|
14/84 | 0% | 4.20 | EMA | Haru Shanten 2019 | Perm | |
| 22 | 130 |
|
21/24 | 0% | 2.50 | RR | Toi-Toi-man Tournament | Kirov | |
| 23 | 648 |
|
33/92 | 0% | 3.80 | EMA | VII Russian Riichi Championship "Aki Shanten" | Perm | |
| 24 | 304 |
|
17/24 | 0% | 1.40 | RR | Seven ryanmens | Kirov | |
| 25 | 155 |
|
61/72 | 0% | 3.85 | EMA | Haru Shanten 2018 | Perm | |
| 26 | 733 |
|
5/16 | 0% | 1.20 | RR | Yakuman in discard | Kirov | |
| 27 | 28 |
|
70/72 | 0% | 3.25 | EMA | Perm Riichi 2017 Aki Shanten | Perm | |
| 28 | 667 |
|
6/16 | 0% | 1.20 | RR | Crouching Peacock, Hidden Dragon 2017 | Kirov | |
| 29 | 933 |
|
🥈 | 2/16 | 0% | 1.00 | RR | Third riichi mahjong tournament, Kirov 2017 | Kirov |
| 30 | 545 |
|
6/12 | 0% | 0.90 | CRR | Second riichi mahjong tournament, Kirov 2017 | Kirov |