Vakhonin Stepan

From Saint Petersburg, Russia

EMA: 15990444

Player page

Common russian riichi rating (CRR)

Rating date Oct. 9, 2025 (latest changes Oct. 9, 2025).

58 place (553.53).

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

p1 = (888.89 * 2 * 1 + 978.26 * 2.10 * 0.43 + 94.74 * 3.85 * 0.86 + 610.39 * 3.45 * 1 + 830.51 * 3.25 * 1) / (2 * 1 + 2.10 * 0.43 + 3.85 * 0.86 + 3.45 * 1 + 3.25 * 1) = 602.7863017489676

p2 = (830.51 * 3.25 * 1 + 610.39 * 3.45 * 1 + 888.89 * 2 * 1 + 978.26 * 2.10 * 0.43) / max_coefficients = 504.27432432432425

score = 602.7863017489676 * 0.5 + 504.27432432432425 * 0.5 = 553.5303130366459

Rating changes

Show

all results
Date Place Points Reason
2025-10-04 60 -> 58 553.53
2025-09-30 54 -> 60 567.71 -> 553.53

Seihoku spring tournament 2024: 57% -> 43%
2025-09-26 53 -> 54 567.71
2025-09-15 54 -> 53 567.71
2025-09-14 55 -> 54 567.71
2025-09-12 58 -> 55 567.71
2025-09-03 58 574.80 -> 567.71

SPB Riichi Open 2023: 14% -> 0%
2025-09-01 61 -> 58 557.71 -> 574.80

SPB Riichi Open 2024: 100% -> 86%
2025-08-31 72 -> 61 505.53 -> 557.71

SPB Riichi Open 2025: 0% -> 100%
2025-08-26 73 -> 72 505.53

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
2 889 2025-06-14 🥉 3/19 100% 2.00 CRR Tonpu-master Saint Petersburg
3 831 2025-02-16 11/60 100% 3.25 RR White Wolf Cup Saint Petersburg
4 95 2024-09-01 87/96 86% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
5 978 2024-03-30 🥈 2/47 43% 2.10 RR Seihoku spring tournament 2024 Saint Petersburg
6 953 2023-09-03 6/108 0% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
7 696 2023-04-22 8/24 0% 1.40 CRR Fire cup 2023 Saint Petersburg
8 774 2023-02-25 8/32 0% 1.80 CRR Earth cup Saint Petersburg
9 795 2022-08-27 9/40 0% 1.80 CRR Sun tournament Saint Petersburg
10 198 2022-06-12 90/112 0% 4.05 RR Moscow Riichi 2022 Moscow
11 173 2021-11-28 63/76 0% 3.45 RR Saint Petersburg Open 2021 Saint Petersburg
12 222 2019-11-24 50/64 0% 3.45 EMA Saint Petersburg Open 2019 Saint Petersburg
13 0 2019-06-02 40/40 0% 2.90 RR Summer Cup 2019 Saint Petersburg