Boiko Bogdan
From Kirov, Russia
Common russian riichi rating (CRR)
Rating date June 15, 2025 (latest changes June 15, 2025).
65 place (539.39).
how we calculated rating score
max_coefficients = (4.10 * 1 + 4.60 * 0.86 + 3.85 * 1 + 3.75 * 1) = 15.64266
p1 = (925.37 * 4.10 * 1 + 214.95 * 4.60 * 0.86 + 191.49 * 2.80 * 1 + 113.92 * 3.65 * 1 + 736.84 * 1.50 * 1 + 1000 * 3.10 * 1) / (4.10 * 1 + 4.60 * 0.86 + 2.80 * 1 + 3.65 * 1 + 1.50 * 1 + 3.10 * 1) = 513.2218349878959
p2 = (925.37 * 4.10 * 1 + 1000 * 3.10 * 1 + 736.84 * 1.50 * 1 + 214.95 * 4.60 * 0.86) / max_coefficients = 565.5547074474547
score = 513.2218349878959 * 0.5 + 565.5547074474547 * 0.5 = 539.3882712176753
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-06-15 | 117 -> 65 | 384.19 -> 539.39 |
13 bloody tiles: 0% -> 100% |
| 2025-06-14 | 116 -> 117 | 384.19 | |
| 2025-06-11 | 118 -> 116 | 384.19 | |
| 2025-05-19 | 119 -> 118 | 384.19 | |
| 2025-05-17 | 116 -> 119 | 384.19 | |
| 2025-05-12 | 118 -> 116 | 377.12 -> 384.19 |
X Russian Championship: 100% -> 86% |
| 2025-05-05 | 119 -> 118 | 377.12 | |
| 2025-05-03 | 114 -> 119 | 377.12 | |
| 2025-04-27 | 112 -> 114 | 377.12 | |
| 2025-04-26 | 110 -> 112 | 377.12 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City |
|---|---|---|---|---|---|---|---|---|
| 1 | 925 |
|
6/68 | 100% | 4.10 | RR | 13 bloody tiles | Perm |
| 2 | 1000 |
|
1/32 | 100% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow |
| 3 | 737 |
|
6/20 | 100% | 1.50 | CRR | Dirty Riichi | Kirov |
| 4 | 114 |
|
71/80 | 100% | 3.65 | RR | Riichi over Volga | Samara |
| 5 | 191 |
|
39/48 | 100% | 2.80 | RR | Guardian of the Winds | Yekaterinburg |
| 6 | 215 |
|
85/108 | 86% | 4.60 | RR | X Russian Championship | Perm |