Vakhonin Stepan

From Saint Petersburg, Russia

EMA: 15990444

Player page

Internal rating (RR)

Rating date Sept. 5, 2025 (latest changes Sept. 3, 2025).

85 place (470.40).

max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8

p1 = (978.26 * 2.10 * 0.57 + 94.74 * 3.85 * 0.86 + 830.51 * 3.25 * 1 + 610.39 * 3.45 * 1 + 0) / (2.10 * 0.57 + 3.85 * 0.86 + 3.25 * 1 + 3.45 * 1 + 1) = 515.7029535380776

p2 = (830.51 * 3.25 * 1 + 610.39 * 3.45 * 1 + 978.26 * 2.10 * 0.57 + 94.74 * 3.85 * 0.86) / max_coefficients = 425.09864864864863

score = 515.7029535380776 * 0.5 + 425.09864864864863 * 0.5 = 470.40080109336316

Rating changes

Show

all results
Date Place Points Reason
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
2025-08-04 103 -> 100 398.03 -> 399.57
2025-08-03 102 -> 103 398.03
2025-07-30 95 -> 102 414.88 -> 398.03

Seihoku spring tournament 2024: 71% -> 57%
2025-07-14 96 -> 95 414.88
2025-07-13 95 -> 96 414.88
2025-07-12 96 -> 95 411.78 -> 414.88

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 610 2025-08-31 31/78 100% 3.45 RR SPB Riichi Open 2025 Saint Petersburg
2 831 2025-02-16 11/60 100% 3.25 RR White Wolf Cup Saint Petersburg
3 95 2024-09-01 87/96 86% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
4 978 2024-03-30 🥈 2/47 57% 2.10 RR Seihoku spring tournament 2024 Saint Petersburg
5 953 2023-09-03 6/108 0% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
6 198 2022-06-12 90/112 0% 4.05 RR Moscow Riichi 2022 Moscow
7 173 2021-11-28 63/76 0% 3.45 RR Saint Petersburg Open 2021 Saint Petersburg
8 222 2019-11-24 50/64 0% 3.45 EMA Saint Petersburg Open 2019 Saint Petersburg
9 0 2019-06-02 40/40 0% 2.90 RR Summer Cup 2019 Saint Petersburg