Ryabov Aleksandr
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Dec. 10, 2025 (latest changes Dec. 9, 2025).
50 place (570.34).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95
p1 = (352.94 * 3.05 * 0.29 + 925.23 * 4.60 * 0.43 + 387.10 * 1.80 * 0.43 + 221.05 * 3.85 * 0.71 + 853.93 * 3.75 * 0.86 + 260.87 * 2.80 * 0.86 + 161.29 * 3.10 * 1 + 789.47 * 1.50 * 1 + 967.74 * 3 * 1) / (3.05 * 0.29 + 4.60 * 0.43 + 1.80 * 0.43 + 3.85 * 0.71 + 3.75 * 0.86 + 2.80 * 0.86 + 3.10 * 1 + 1.50 * 1 + 3 * 1) = 561.657349891986
p2 = (967.74 * 3 * 1 + 853.93 * 3.75 * 0.86 + 925.23 * 4.60 * 0.43 + 789.47 * 1.50 * 1) / max_coefficients = 579.0127090301005
score = 561.657349891986 * 0.5 + 579.0127090301005 * 0.5 = 570.3350294610432
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-12-07 | 49 -> 50 | 570.34 | |
| 2025-12-04 | 50 -> 49 | 570.34 | |
| 2025-12-01 | 51 -> 50 | 567.32 -> 570.34 |
Riichi never changing: 100% -> 86% |
| 2025-11-30 | 85 -> 51 | 458.25 -> 567.32 |
Final Cup 2025: 0% -> 100% |
| 2025-11-25 | 85 | 463.18 -> 458.25 | |
| 2025-11-22 | 84 -> 85 | 463.18 | |
| 2025-11-19 | 85 -> 84 | 462.42 -> 463.18 |
"Green Dragon" in the Secret Chamber: 57% -> 43% |
| 2025-11-14 | 86 -> 85 | 462.42 | |
| 2025-11-12 | 77 -> 86 | 490.53 -> 462.42 |
X Russian Championship: 57% -> 43% |
| 2025-11-10 | 79 -> 77 | 488.74 -> 490.53 |
Agari Spring Tournament 2024: 43% -> 29% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Rating | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 968 |
|
🥈 | 2/32 | 100% | 3.00 | RR | Final Cup 2025 | Moscow |
| 2 | 789 |
|
5/20 | 100% | 1.50 | CRR | HaTiKo | Korolyov | |
| 3 | 161 |
|
27/32 | 100% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow | |
| 4 | 261 |
|
18/24 | 86% | 2.80 | CRR | Riichi never changing | Moscow | |
| 5 | 854 |
|
14/90 | 86% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 6 | 221 |
|
75/96 | 71% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 7 | 387 |
|
20/32 | 43% | 1.80 | CRR | "Green Dragon" in the Secret Chamber | Korolyov | |
| 8 | 925 |
|
9/108 | 43% | 4.60 | RR | X Russian Championship | Perm | |
| 9 | 353 |
|
34/52 | 29% | 3.05 | RR | Agari Spring Tournament 2024 | Moscow | |
| 10 | 897 |
|
5/40 | 0% | 2.90 | CRR | Autumn Agari tournament | Moscow | |
| 11 | 364 |
|
15/23 | 0% | 2.10 | CRR | Mushroom League | Moscow | |
| 12 | 832 |
|
19/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 13 | 437 |
|
50/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
| 14 | 348 |
|
16/24 | 0% | 2.80 | CRR | Meeting in the billiard room | Moscow | |
| 15 | 595 |
|
46/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow |