Tsiporin Aleksandr
From Moscow, Russia
Common russian riichi rating (CRR)
Rating date Sept. 5, 2025 (latest changes Sept. 5, 2025).
52 place (581.60).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (126.32 * 3.85 * 0.86 + 258.43 * 3.75 * 1 + 452.38 * 2.60 * 1 + 745.10 * 3.05 * 1 + 525.42 * 3.25 * 1 + 210.53 * 1.50 * 1 + 597.01 * 4.10 * 1 + 961.04 * 3.45 * 1) / (3.85 * 0.86 + 3.75 * 1 + 2.60 * 1 + 3.05 * 1 + 3.25 * 1 + 1.50 * 1 + 4.10 * 1 + 3.45 * 1) = 504.8601320768717
p2 = (961.04 * 3.45 * 1 + 597.01 * 4.10 * 1 + 745.10 * 3.05 * 1 + 525.42 * 3.25 * 1) / max_coefficients = 658.3459459459459
score = 504.8601320768717 * 0.5 + 658.3459459459459 * 0.5 = 581.6030390114088
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-01 | 59 -> 52 | 568.87 -> 581.60 |
SPB Riichi Open 2024: 100% -> 86% |
| 2025-08-31 | 91 -> 59 | 462.25 -> 568.87 |
SPB Riichi Open 2025: 0% -> 100% |
| 2025-08-04 | 91 | 459.80 -> 462.25 | |
| 2025-08-03 | 90 -> 91 | 459.80 | |
| 2025-07-30 | 92 -> 90 | 459.80 | |
| 2025-07-26 | 89 -> 92 | 459.80 | |
| 2025-07-13 | 87 -> 89 | 459.80 | |
| 2025-07-12 | 89 -> 87 | 455.17 -> 459.80 | |
| 2025-07-10 | 91 -> 89 | 455.17 | |
| 2025-07-05 | 92 -> 91 | 455.17 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 961 |
|
4/78 | 100% | 3.45 | RR | SPB Riichi Open 2025 | Saint Petersburg | |
| 2 | 597 |
|
28/68 | 100% | 4.10 | RR | 13 bloody tiles | Perm | |
| 3 | 211 |
|
16/20 | 100% | 1.50 | CRR | HaTiKo | Korolyov | |
| 4 | 525 |
|
29/60 | 100% | 3.25 | RR | White Wolf Cup | Saint Petersburg | |
| 5 | 745 |
|
14/52 | 100% | 3.05 | RR | Agari Winter Tournament 2025 | Moscow | |
| 6 | 452 |
|
24/43 | 100% | 2.60 | RR | Riichi On Ice | Samara | |
| 7 | 258 |
|
67/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 8 | 126 |
|
84/96 | 86% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg |