Lavreniuk Irina
From Moscow, Russia
EMA: 15990327
Internal rating (RR)
Rating date Sept. 4, 2025 (latest changes Sept. 3, 2025).
138 place (303.87).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (666.67 * 3.05 * 0.57 + 413.04 * 2.10 * 0.57 + 18.69 * 4.60 * 0.71 + 539.33 * 3.75 * 1 + 294.12 * 3.05 * 1 + 67.80 * 3.25 * 1) / (3.05 * 0.57 + 2.10 * 0.57 + 4.60 * 0.71 + 3.75 * 1 + 3.05 * 1 + 3.25 * 1) = 298.4779300782812
p2 = (539.33 * 3.75 * 1 + 666.67 * 3.05 * 0.57 + 294.12 * 3.05 * 1 + 413.04 * 2.10 * 0.57) / max_coefficients = 309.2574324324324
score = 298.4779300782812 * 0.5 + 309.2574324324324 * 0.5 = 303.8676812553568
Rating changes
| Date | Place | Points | Reason |
|---|---|---|---|
| 2025-09-03 | 138 | 305.94 -> 303.87 |
SPB Riichi Open 2023: 14% -> 0% |
| 2025-09-01 | 142 -> 138 | 301.87 -> 305.94 | |
| 2025-08-31 | 137 -> 142 | 301.87 | |
| 2025-08-04 | 137 | 300.40 -> 301.87 | |
| 2025-08-03 | 131 -> 137 | 300.40 | |
| 2025-07-30 | 131 | 305.40 -> 300.40 |
Seihoku spring tournament 2024: 71% -> 57% |
| 2025-07-13 | 128 -> 131 | 305.40 | |
| 2025-07-12 | 129 -> 128 | 297.26 -> 305.40 |
X Russian Championship: 86% -> 71% |
| 2025-07-10 | 127 -> 129 | 311.00 -> 297.26 |
Agari Spring Tournament 2024: 71% -> 57% |
| 2025-07-03 | 126 -> 127 | 312.79 -> 311.00 |
SPB Riichi Open 2023: 29% -> 14% |
Tournaments
| # | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 68 |
|
56/60 | 100% | 3.25 | RR | White Wolf Cup | Saint Petersburg | |
| 2 | 294 |
|
37/52 | 100% | 3.05 | RR | Agari Winter Tournament 2025 | Moscow | |
| 3 | 539 |
|
42/90 | 100% | 3.75 | RR | Moscow Riichi 2024 | Moscow | |
| 4 | 19 |
|
106/108 | 71% | 4.60 | RR | X Russian Championship | Perm | |
| 5 | 413 |
|
28/47 | 57% | 2.10 | RR | Seihoku spring tournament 2024 | Saint Petersburg | |
| 6 | 667 |
|
18/52 | 57% | 3.05 | RR | Agari Spring Tournament 2024 | Moscow | |
| 7 | 421 |
|
63/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
| 8 | 391 |
|
54/88 | 0% | 3.75 | RR | Money can not buy tenpai | Perm | |
| 9 | 427 |
|
44/76 | 0% | 4.20 | RR | IX Russian Riichi Championship | Perm | |
| 10 | 604 |
|
45/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow | |
| 11 | 253 |
|
57/76 | 0% | 3.45 | RR | Saint Petersburg Open 2021 | Saint Petersburg |