Ryabov Aleksandr
From Moscow, Russia
Internal rating (RR)
Rating date Jan. 3, 2025 (latest changes Jan. 3, 2025).
22 place (642.35).
how we calculated rating score
max_coefficients = (4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.85
p1 = (436.78 * 3.75 * 0.43 + 831.78 * 4 * 0.57 + 925.23 * 4.60 * 1 + 221.05 * 3.85 * 1 + 853.93 * 3.75 * 1 + 352.94 * 3.05 * 1) / (3.75 * 0.43 + 4 * 0.57 + 4.60 * 1 + 3.85 * 1 + 3.75 * 1 + 3.05 * 1) = 626.2897113021311
p2 = (925.23 * 4.60 * 1 + 853.93 * 3.75 * 1 + 831.78 * 4 * 0.57 + 352.94 * 3.05 * 1) / max_coefficients = 658.4164037854889
score = 626.2897113021311 * 0.5 + 658.4164037854889 * 0.5 = 642.35305754381
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-01-03 | 18 -> 22 | 660.33 -> 642.35 |
SPB Riichi Open 2023: 71% -> 57% |
| 2024-12-11 | 20 -> 18 | 657.75 -> 660.33 |
Money can not buy tenpai: 57% -> 43% |
| 2024-11-06 | 21 -> 20 | 657.75 | |
| 2024-11-03 | 19 -> 21 | 675.54 -> 657.75 |
SPB Riichi Open 2023: 86% -> 71% |
| 2024-10-13 | 32 -> 19 | 585.71 -> 675.54 |
Moscow Riichi 2024: 0% -> 100% |
| 2024-10-11 | 32 | 591.00 -> 585.71 |
Money can not buy tenpai: 71% -> 57% |
| 2024-09-03 | 29 -> 32 | 599.04 -> 591.00 |
SPB Riichi Open 2023: 100% -> 86% |
| 2024-09-01 | 19 -> 29 | 641.86 -> 599.04 |
SPB Riichi Open 2024: 0% -> 100% |
| 2024-08-11 | 20 -> 19 | 642.56 -> 641.86 |
Money can not buy tenpai: 86% -> 71% |
| 2024-08-04 | 14 -> 20 | 655.69 -> 642.56 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 854 |
|
14/90 | 100% | 3.75 | RR | Moscow Riichi 2024 |
| 2 | 221 |
|
75/96 | 100% | 3.85 | RR | SPB Riichi Open 2024 |
| 3 | 925 |
|
9/108 | 100% | 4.60 | RR | X Russian Championship |
| 4 | 353 |
|
34/52 | 100% | 3.05 | RR | Agari Spring Tournament 2024 |
| 5 | 832 |
|
19/108 | 57% | 4.00 | RR | SPB Riichi Open 2023 |
| 6 | 437 |
|
50/88 | 43% | 3.75 | RR | Money can not buy tenpai |
| 7 | 595 |
|
46/112 | 0% | 4.05 | RR | Moscow Riichi 2022 |