Vakhonin Stepan

From Saint Petersburg, Russia

EMA: 15990444

Player page

Internal rating (RR)

Rating date Dec. 10, 2025 (latest changes Dec. 9, 2025).

84 place (444.81).

max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95

p1 = (978.26 * 2.10 * 0.29 + 94.74 * 3.85 * 0.71 + 830.51 * 3.25 * 1 + 610.39 * 3.45 * 1 + 0) / (2.10 * 0.29 + 3.85 * 0.71 + 3.25 * 1 + 3.45 * 1 + 1) = 511.5327793376033

p2 = (830.51 * 3.25 * 1 + 610.39 * 3.45 * 1 + 978.26 * 2.10 * 0.29 + 94.74 * 3.85 * 0.71) / max_coefficients = 378.0903010033445

score = 511.5327793376033 * 0.5 + 378.0903010033445 * 0.5 = 444.8115401704739

Rating changes

Show

all results
Date Place Points Reason
2025-12-07 83 -> 84 444.81
2025-12-04 85 -> 83 444.81
2025-11-30 76 -> 85 460.80 -> 444.81

Seihoku spring tournament 2024: 43% -> 29%
2025-11-12 83 -> 76 460.80
2025-11-10 82 -> 83 460.80
2025-11-04 78 -> 82 469.84 -> 460.80
2025-11-01 84 -> 78 461.02 -> 469.84

SPB Riichi Open 2024: 86% -> 71%
2025-10-13 83 -> 84 454.66 -> 461.02
2025-10-09 84 -> 83 454.66
2025-10-04 86 -> 84 454.66

Tournaments

# Base rank Date Place Power Coefficient Rating 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 71% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
4 978 2024-03-30 🥈 2/47 29% 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