Ryabov Aleksandr
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Sept. 20, 2023 (latest changes Sept. 20, 2023).
31 place (523.15).
how we calculated rating score
max_coefficients = (4.20 * 1 + 4 * 1 + 3.75 * 1 + 4.05 * 0.71) = 14.842915
p1 = (347.83 * 2.80 * 1 + 594.59 * 4.05 * 0.71 + 436.78 * 3.75 * 1 + 831.78 * 4 * 1 + 0) / (2.80 * 1 + 4.05 * 0.71 + 3.75 * 1 + 4 * 1 + 1) = 530.2980734844732
p2 = (831.78 * 4 * 1 + 594.59 * 4.05 * 0.71 + 436.78 * 3.75 * 1 + 347.83 * 2.80 * 1) / max_coefficients = 516.0071320222477
score = 530.2980734844732 * 0.5 + 516.0071320222477 * 0.5 = 523.1526027533605
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2023-09-20 | 34 -> 31 | 523.15 | |
| 2023-09-06 | 32 -> 34 | 523.15 | |
| 2023-09-03 | 73 -> 32 | 348.05 -> 523.15 |
SPB Riichi Open 2023: 0% -> 100% |
| 2023-08-19 | 75 -> 73 | 348.05 | |
| 2023-08-12 | 72 -> 75 | 358.88 -> 348.05 |
Moscow Riichi 2022: 86% -> 71% |
| 2023-07-28 | 73 -> 72 | 358.88 | |
| 2023-07-20 | 76 -> 73 | 358.88 | |
| 2023-07-05 | 77 -> 76 | 358.88 | |
| 2023-06-12 | 72 -> 77 | 368.80 -> 358.88 |
Moscow Riichi 2022: 100% -> 86% |
| 2023-06-11 | 87 -> 72 | 296.47 -> 368.80 |
Money can not buy tenpai: 0% -> 100% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament |
|---|---|---|---|---|---|---|---|
| 1 | 832 |
|
19/108 | 100% | 4.00 | RR | SPB Riichi Open 2023 |
| 2 | 437 |
|
50/88 | 100% | 3.75 | RR | Money can not buy tenpai |
| 3 | 348 |
|
16/24 | 100% | 2.80 | CRR | Meeting in the billiard room |
| 4 | 595 |
|
46/112 | 71% | 4.05 | RR | Moscow Riichi 2022 |