Ryabov Aleksandr
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Sept. 3, 2025 (latest changes Sept. 3, 2025).
59 place (564.74).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (363.64 * 2.10 * 0.14 + 897.44 * 2.90 * 0.29 + 352.94 * 3.05 * 0.57 + 925.23 * 4.60 * 0.71 + 387.10 * 1.80 * 0.71 + 221.05 * 3.85 * 0.86 + 853.93 * 3.75 * 1 + 260.87 * 2.80 * 1 + 789.47 * 1.50 * 1) / (2.10 * 0.14 + 2.90 * 0.29 + 3.05 * 0.57 + 4.60 * 0.71 + 1.80 * 0.71 + 3.85 * 0.86 + 3.75 * 1 + 2.80 * 1 + 1.50 * 1) = 577.452628660688
p2 = (853.93 * 3.75 * 1 + 925.23 * 4.60 * 0.71 + 789.47 * 1.50 * 1 + 897.44 * 2.90 * 0.29) / max_coefficients = 552.0351351351352
score = 577.452628660688 * 0.5 + 552.0351351351352 * 0.5 = 564.7438818979116
Rating changes
Date | Place | Points | Reason |
---|---|---|---|
2025-09-03 | 60 -> 59 | 568.50 -> 564.74 |
SPB Riichi Open 2023: 14% -> 0% |
2025-09-01 | 60 | 561.83 -> 568.50 |
SPB Riichi Open 2024: 100% -> 86% |
2025-08-31 | 56 -> 60 | 561.83 | |
2025-08-22 | 58 -> 56 | 560.17 -> 561.83 |
Mushroom League: 29% -> 14% |
2025-08-04 | 59 -> 58 | 557.51 -> 560.17 | |
2025-08-03 | 58 -> 59 | 557.51 | |
2025-07-30 | 59 -> 58 | 557.51 | |
2025-07-26 | 54 -> 59 | 569.48 -> 557.51 |
Autumn Agari tournament: 43% -> 29% |
2025-07-19 | 54 | 568.23 -> 569.48 |
"Green Dragon" in the Secret Chamber: 86% -> 71% |
2025-07-14 | 55 -> 54 | 568.23 |
Tournaments
# | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
---|---|---|---|---|---|---|---|---|---|
1 | 789 |
|
5/20 | 100% | 1.50 | CRR | HaTiKo | Korolyov | |
2 | 161 |
|
27/32 | 100% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
3 | 261 |
|
18/24 | 100% | 2.80 | CRR | Riichi never changing | Moscow | |
4 | 854 |
|
14/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
5 | 221 |
|
75/96 | 86% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
6 | 387 |
|
20/32 | 71% | 1.80 | CRR | "Green Dragon" in the Secret Chamber | Korolyov | |
7 | 925 |
|
9/108 | 71% | 4.60 | RR | X Russian Championship | Perm | |
8 | 353 |
|
34/52 | 57% | 3.05 | RR | Agari Spring Tournament 2024 | Moscow | |
9 | 897 |
|
5/40 | 29% | 2.90 | CRR | Autumn Agari tournament | Moscow | |
10 | 364 |
|
15/23 | 14% | 2.10 | CRR | Mushroom League | Moscow | |
11 | 832 |
|
19/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
12 | 437 |
|
50/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
13 | 348 |
|
16/24 | 0% | 2.80 | CRR | Meeting in the billiard room | Moscow | |
14 | 595 |
|
46/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow |