Kopylov Dmitry

From Saint Petersburg, Russia

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Internal rating (RR)

Rating date Oct. 13, 2025 (latest changes Oct. 13, 2025).

98 place (421.96).

max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.85 * 0.86) = 14.349835

p1 = (630.43 * 2.10 * 0.43 + 978.95 * 3.85 * 0.86 + 123.60 * 3.75 * 0.86 + 423.73 * 3.25 * 1 + 342.86 * 1.90 * 1 + 194.81 * 3.45 * 1) / (2.10 * 0.43 + 3.85 * 0.86 + 3.75 * 0.86 + 3.25 * 1 + 1.90 * 1 + 3.45 * 1) = 430.6020599449732

p2 = (978.95 * 3.85 * 0.86 + 423.73 * 3.25 * 1 + 194.81 * 3.45 * 1 + 342.86 * 1.90 * 1) / max_coefficients = 413.31416005828635

score = 430.6020599449732 * 0.5 + 413.31416005828635 * 0.5 = 421.95811000162973

Rating changes

Show

all results
Date Place Points Reason
2025-10-13 100 -> 98 410.70 -> 421.96

Moscow Riichi 2024: 100% -> 86%
2025-10-09 101 -> 100 410.70
2025-09-30 100 -> 101 416.12 -> 410.70

Seihoku spring tournament 2024: 57% -> 43%
2025-09-10 101 -> 100 416.12
2025-09-03 102 -> 101 412.53 -> 416.12

SPB Riichi Open 2023: 14% -> 0%
2025-09-01 99 -> 102 433.48 -> 412.53

SPB Riichi Open 2024: 100% -> 86%
2025-08-31 83 -> 99 461.26 -> 433.48

SPB Riichi Open 2025: 0% -> 100%
2025-08-09 85 -> 83 461.26
2025-08-04 86 -> 85 459.15 -> 461.26
2025-08-03 85 -> 86 459.15

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 195 2025-08-31 63/78 100% 3.45 RR SPB Riichi Open 2025 Saint Petersburg
2 343 2025-04-26 24/36 100% 1.90 RR Seihoku spring tournament 2025 Saint Petersburg
3 424 2025-02-16 35/60 100% 3.25 RR White Wolf Cup Saint Petersburg
4 124 2024-10-13 79/90 86% 3.75 RR Moscow Riichi 2024 Moscow
5 979 2024-09-01 🥉 3/96 86% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
6 630 2024-03-30 18/47 43% 2.10 RR Seihoku spring tournament 2024 Saint Petersburg
7 206 2023-09-03 86/108 0% 4.00 RR SPB Riichi Open 2023 Saint Petersburg
8 120 2022-11-06 67/76 0% 4.20 RR IX Russian Riichi Championship Perm
9 135 2022-06-12 97/112 0% 4.05 RR Moscow Riichi 2022 Moscow