Ryabov Aleksandr
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Nov. 4, 2025 (latest changes Nov. 4, 2025).
78 place (499.52).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.25 * 1) = 14.3
p1 = (897.44 * 2.90 * 0.14 + 352.94 * 3.05 * 0.43 + 925.23 * 4.60 * 0.57 + 387.10 * 1.80 * 0.57 + 221.05 * 3.85 * 0.71 + 853.93 * 3.75 * 0.86 + 260.87 * 2.80 * 1 + 161.29 * 3.10 * 1 + 789.47 * 1.50 * 1) / (2.90 * 0.14 + 3.05 * 0.43 + 4.60 * 0.57 + 1.80 * 0.57 + 3.85 * 0.71 + 3.75 * 0.86 + 2.80 * 1 + 3.10 * 1 + 1.50 * 1) = 503.15641543036827
p2 = (853.93 * 3.75 * 0.86 + 925.23 * 4.60 * 0.57 + 789.47 * 1.50 * 1 + 260.87 * 2.80 * 1) / max_coefficients = 495.8888111888112
score = 503.15641543036827 * 0.5 + 495.8888111888112 * 0.5 = 499.5226133095897
Rating changes
| Date | Place | Points | Reason | 
|---|---|---|---|
| 2025-11-04 | 77 -> 78 | 499.52 | |
| 2025-11-01 | 78 -> 77 | 494.64 -> 499.52 | 
                        
                             SPB Riichi Open 2024: 86% -> 71%  | 
                
| 2025-10-27 | 79 -> 78 | 494.64 | |
| 2025-10-22 | 70 -> 79 | 524.82 -> 494.64 | 
                        
                             Mushroom League: 14% -> 0%  | 
                
| 2025-10-13 | 67 -> 70 | 537.46 -> 524.82 | 
                        
                             Moscow Riichi 2024: 100% -> 86%  | 
                
| 2025-10-04 | 68 -> 67 | 537.46 | |
| 2025-09-26 | 67 -> 68 | 541.85 -> 537.46 | 
                        
                             Autumn Agari tournament: 29% -> 14%  | 
                
| 2025-09-19 | 67 | 540.50 -> 541.85 | 
                        
                             "Green Dragon" in the Secret Chamber: 71% -> 57%  | 
                
| 2025-09-12 | 59 -> 67 | 567.41 -> 540.50 | 
                        
                             X Russian Championship: 71% -> 57%  | 
                
| 2025-09-10 | 59 | 564.74 -> 567.41 | 
                        
                             Agari Spring Tournament 2024: 57% -> 43%  | 
                
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 | 86% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 5 | 221 | 
                     | 
                75/96 | 71% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
| 6 | 387 | 
                     | 
                20/32 | 57% | 1.80 | CRR | "Green Dragon" in the Secret Chamber | Korolyov | |
| 7 | 925 | 
                     | 
                9/108 | 57% | 4.60 | RR | X Russian Championship | Perm | |
| 8 | 353 | 
                     | 
                34/52 | 43% | 3.05 | RR | Agari Spring Tournament 2024 | Moscow | |
| 9 | 897 | 
                     | 
                5/40 | 14% | 2.90 | CRR | Autumn Agari tournament | Moscow | |
| 10 | 364 | 
                     | 
                15/23 | 0% | 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 |