Boiko Bogdan
From Kirov, Russia
Common russian riichi rating (CRR)
Rating date May 20, 2025 (latest changes May 19, 2025).
118 place (384.19).
how we calculated rating score
max_coefficients = (4.60 * 0.86 + 3.85 * 1 + 3.75 * 1 + 3.65 * 1) = 15.19266
p1 = (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) / (4.60 * 0.86 + 2.80 * 1 + 3.65 * 1 + 1.50 * 1 + 3.10 * 1) = 400.5119838641042
p2 = (1000 * 3.10 * 1 + 736.84 * 1.50 * 1 + 214.95 * 4.60 * 0.86 + 191.49 * 2.80 * 1) / max_coefficients = 367.86974762813094
score = 400.5119838641042 * 0.5 + 367.86974762813094 * 0.5 = 384.19086574611754
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 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 | |
| 2025-04-25 | 109 -> 110 | 377.12 | |
| 2025-03-30 | 110 -> 109 | 377.12 | |
| 2025-03-26 | 111 -> 110 | 377.12 |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City |
|---|---|---|---|---|---|---|---|---|
| 1 | 1000 |
|
1/32 | 100% | 3.10 | RR | Moscow Open Riichi Marathon | Moscow |
| 2 | 737 |
|
6/20 | 100% | 1.50 | CRR | Dirty Riichi | Kirov |
| 3 | 114 |
|
71/80 | 100% | 3.65 | RR | Riichi over Volga | Samara |
| 4 | 191 |
|
39/48 | 100% | 2.80 | RR | Guardian of the Winds | Yekaterinburg |
| 5 | 215 |
|
85/108 | 86% | 4.60 | RR | X Russian Championship | Perm |