Boiko Bogdan

From Kirov, Russia

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Internal rating (RR)

Rating date March 25, 2026 (latest changes March 14, 2026).

76 place (480.38).

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

p1 = (214.95 * 4.60 * 0.14 + 191.49 * 2.80 * 0.29 + 113.92 * 3.65 * 0.43 + 1000 * 3.10 * 0.71 + 925.37 * 4.10 * 1 + 46.51 * 3 * 1) / (4.60 * 0.14 + 2.80 * 0.29 + 3.65 * 0.43 + 3.10 * 0.71 + 4.10 * 1 + 3 * 1) = 536.687683709981

p2 = (925.37 * 4.10 * 1 + 1000 * 3.10 * 0.71 + 113.92 * 3.65 * 0.43 + 191.49 * 2.80 * 0.29) / max_coefficients = 424.0642140468228

score = 536.687683709981 * 0.5 + 424.0642140468228 * 0.5 = 480.3759488784019

Rating changes

Show

all results
Date Place Points Reason
2026-03-14 77 -> 76 477.52 -> 480.38

Guardian of the Winds: 43% -> 29%
2026-03-12 80 -> 77 473.38 -> 477.52

X Russian Championship: 29% -> 14%
2026-03-07 73 -> 80 496.01 -> 473.38

Moscow Open Riichi Marathon: 86% -> 71%
2026-03-01 74 -> 73 496.01
2026-02-23 70 -> 74 496.01
2026-02-13 71 -> 70 496.01
2026-02-08 68 -> 71 496.01
2026-02-04 73 -> 68 488.79 -> 496.01

Riichi over Volga: 57% -> 43%
2026-01-26 74 -> 73 488.79
2026-01-25 68 -> 74 488.79

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 47 2025-08-03 42/44 100% 3.00 RR Two roosters and Chuckles Kirov
2 925 2025-06-15 6/68 100% 4.10 RR 13 bloody tiles Perm
3 1000 2025-01-07 🥇 1/32 71% 3.10 RR Moscow Open Riichi Marathon Moscow
4 114 2024-08-04 71/80 43% 3.65 RR Riichi over Volga Samara
5 191 2024-07-14 39/48 29% 2.80 RR Guardian of the Winds Yekaterinburg
6 215 2024-05-12 85/108 14% 4.60 RR X Russian Championship Perm