Vakhonin Stepan
From Saint Petersburg, Russia
EMA: 15990444
Internal rating (RR)
Rating date Oct. 10, 2025 (latest changes Oct. 9, 2025).
83 place (454.66).
how we calculated rating score
max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8
p1 = (94.74 * 3.85 * 0.86 + 830.51 * 3.25 * 1 + 978.26 * 2.10 * 0.43 + 610.39 * 3.45 * 1 + 0) / (3.85 * 0.86 + 3.25 * 1 + 2.10 * 0.43 + 3.45 * 1 + 1) = 504.0464642755251
p2 = (830.51 * 3.25 * 1 + 610.39 * 3.45 * 1 + 978.26 * 2.10 * 0.43 + 94.74 * 3.85 * 0.86) / max_coefficients = 405.277027027027
score = 504.0464642755251 * 0.5 + 405.277027027027 * 0.5 = 454.6617456512761
Rating changes
Date | Place | Points | Reason |
---|---|---|---|
2025-10-09 | 84 -> 83 | 454.66 | |
2025-10-04 | 86 -> 84 | 454.66 | |
2025-09-30 | 81 -> 86 | 470.40 -> 454.66 |
Seihoku spring tournament 2024: 57% -> 43% |
2025-09-14 | 82 -> 81 | 470.40 | |
2025-09-12 | 83 -> 82 | 470.40 | |
2025-09-10 | 85 -> 83 | 470.40 | |
2025-09-03 | 70 -> 85 | 510.78 -> 470.40 |
SPB Riichi Open 2023: 14% -> 0% |
2025-09-01 | 76 -> 70 | 494.13 -> 510.78 |
SPB Riichi Open 2024: 100% -> 86% |
2025-08-31 | 101 -> 76 | 399.57 -> 494.13 |
SPB Riichi Open 2025: 0% -> 100% |
2025-08-09 | 100 -> 101 | 399.57 |
Tournaments
# | Base rank | Date | Place | Power | Coefficient | Type | Tournament | City | |
---|---|---|---|---|---|---|---|---|---|
1 | 610 |
|
31/78 | 100% | 3.45 | RR | SPB Riichi Open 2025 | Saint Petersburg | |
2 | 831 |
|
11/60 | 100% | 3.25 | RR | White Wolf Cup | Saint Petersburg | |
3 | 95 |
|
87/96 | 86% | 3.85 | RR | SPB Riichi Open 2024 | Saint Petersburg | |
4 | 978 |
|
🥈 | 2/47 | 43% | 2.10 | RR | Seihoku spring tournament 2024 | Saint Petersburg |
5 | 953 |
|
6/108 | 0% | 4.00 | RR | SPB Riichi Open 2023 | Saint Petersburg | |
6 | 198 |
|
90/112 | 0% | 4.05 | RR | Moscow Riichi 2022 | Moscow | |
7 | 173 |
|
63/76 | 0% | 3.45 | RR | Saint Petersburg Open 2021 | Saint Petersburg | |
8 | 222 |
|
50/64 | 0% | 3.45 | EMA | Saint Petersburg Open 2019 | Saint Petersburg | |
9 | 0 |
|
40/40 | 0% | 2.90 | RR | Summer Cup 2019 | Saint Petersburg |