Petsilyak Igor

From Moscow, Russia

EMA: 15990408

Player page

Internal rating (RR)

Rating date Sept. 16, 2026 (latest changes Sept. 13, 2026).

104 place (421.69).

max_coefficients = (4.71 * 1 + 3.90 * 1 + 3.40 * 1 + 3.40 * 1) = 15.41

p1 = (910.11 * 3.75 * 0.14 + 258.06 * 3.10 * 0.29 + 254.90 * 3.05 * 0.43 + 466.67 * 2.45 * 0.71 + 181.82 * 3.45 * 0.86 + 578.95 * 3.90 * 1 + 466.67 * 3 * 1 + 554.05 * 3.40 * 1 + 251.75 * 4.71 * 1) / (3.75 * 0.14 + 3.10 * 0.29 + 3.05 * 0.43 + 2.45 * 0.71 + 3.45 * 0.86 + 3.90 * 1 + 3 * 1 + 3.40 * 1 + 4.71 * 1) = 406.8114286834444

p2 = (578.95 * 3.90 * 1 + 554.05 * 3.40 * 1 + 466.67 * 3 * 1 + 251.75 * 4.71 * 1) / max_coefficients = 436.56067488643737

score = 406.8114286834444 * 0.5 + 436.56067488643737 * 0.5 = 421.6860517849409

Rating changes

Show

all results
Date Place Points Reason
2026-09-13 105 -> 104 422.15 -> 421.69

Agari Summer Tournament 2025: 86% -> 71%
2026-09-07 106 -> 105 420.72 -> 422.15

Moscow Open Riichi Marathon: 43% -> 29%
2026-09-06 101 -> 106 420.72
2026-09-02 102 -> 101 420.72
2026-09-01 105 -> 102 416.52 -> 420.72

SPB Riichi Open 2024: 14% -> 0%
2026-08-31 106 -> 105 413.64 -> 416.52

SPB Riichi Open 2025: 100% -> 86%
2026-08-16 102 -> 106 413.64
2026-08-15 102 412.04 -> 413.64
2026-08-13 99 -> 102 417.63 -> 412.04

Moscow Riichi 2024: 29% -> 14%
2026-08-04 106 -> 99 415.31 -> 417.63

Riichi over Volga: 14% -> 0%

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 252 2026-06-14 108/144 100% 4.71 RR XII Russian Championship Samara
2 80 2026-04-05 47/51 100% 3.10 RR Moscow Riichi 2026 Moscow
3 554 2026-02-23 34/75 100% 3.40 RR White Wolf Cup 2026 Saint Petersburg
4 467 2026-01-07 17/31 100% 3.00 RR Moscow Open Riichi Marathon 2026 Moscow
5 579 2025-11-04 25/58 100% 3.90 RR XI Russian Championship Moscow
6 182 2025-08-31 64/78 86% 3.45 RR SPB Riichi Open 2025 Saint Petersburg
7 467 2025-07-13 17/31 71% 2.45 RR Agari Summer Tournament 2025 Moscow
8 255 2025-02-02 39/52 43% 3.05 RR Agari Winter Tournament 2025 Moscow
9 258 2025-01-07 24/32 29% 3.10 RR Moscow Open Riichi Marathon Moscow
10 910 2024-10-13 9/90 14% 3.75 RR Moscow Riichi 2024 Moscow
11 42 2024-09-01 92/96 0% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
12 177 2024-08-04 66/80 0% 3.65 RR Riichi over Volga Samara
13 0 2024-06-09 52/52 0% 3.05 RR Agari Summer Tournament 2024 Moscow
14 738 2024-05-12 29/108 0% 4.60 RR X Russian Championship Perm
15 103 2023-09-03 97/108 0% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
16 493 2022-11-06 39/76 0% 4.20 RR IX Russian Riichi Championship Perm
17 189 2022-06-12 91/112 0% 4.05 RR Moscow Riichi 2022 Moscow
18 733 2021-11-28 21/76 0% 3.45 RR Saint Petersburg Open 2021 Saint Petersburg