Vakhonin Stepan

From Saint Petersburg, Russia

EMA: 15990444

Player page

Internal rating (RR)

Rating date Feb. 9, 2026 (latest changes Feb. 8, 2026).

87 place (437.64).

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

p1 = (978.26 * 2.10 * 0.14 + 94.74 * 3.85 * 0.57 + 830.51 * 3.25 * 1 + 610.39 * 3.45 * 1 + 0) / (2.10 * 0.14 + 3.85 * 0.57 + 3.25 * 1 + 3.45 * 1 + 1) = 520.292196651366

p2 = (830.51 * 3.25 * 1 + 610.39 * 3.45 * 1 + 978.26 * 2.10 * 0.14 + 94.74 * 3.85 * 0.57) / max_coefficients = 354.98127090301

score = 520.292196651366 * 0.5 + 354.98127090301 * 0.5 = 437.636733777188

Rating changes

Show

all results
Date Place Points Reason
2026-02-08 86 -> 87 437.64
2026-02-04 87 -> 86 437.64
2026-01-30 83 -> 87 453.99 -> 437.64

Seihoku spring tournament 2024: 29% -> 14%
2026-01-25 76 -> 83 453.99
2026-01-14 77 -> 76 453.99
2026-01-12 78 -> 77 453.99
2026-01-07 77 -> 78 453.99
2026-01-01 82 -> 77 444.81 -> 453.99

SPB Riichi Open 2024: 71% -> 57%
2025-12-13 84 -> 82 444.81
2025-12-07 83 -> 84 444.81

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 57% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
4 978 2024-03-30 🥈 2/47 14% 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