Boiko Bogdan

From Kirov, Russia

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Internal rating (RR)

Rating date Nov. 1, 2025 (latest changes Nov. 1, 2025).

65 place (511.60).

max_coefficients = (4.10 * 1 + 3.50 * 1 + 3.45 * 1 + 3.25 * 1) = 14.3

p1 = (214.95 * 4.60 * 0.57 + 191.49 * 2.80 * 0.71 + 113.92 * 3.65 * 0.71 + 1000 * 3.10 * 1 + 925.37 * 4.10 * 1 + 46.51 * 3 * 1) / (4.60 * 0.57 + 2.80 * 0.71 + 3.65 * 0.71 + 3.10 * 1 + 4.10 * 1 + 3 * 1) = 474.80582197133185

p2 = (925.37 * 4.10 * 1 + 1000 * 3.10 * 1 + 214.95 * 4.60 * 0.57 + 191.49 * 2.80 * 0.71) / max_coefficients = 548.3923076923077

score = 474.80582197133185 * 0.5 + 548.3923076923077 * 0.5 = 511.59906483181976

Rating changes

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all results
Date Place Points Reason
2025-11-01 67 -> 65 510.65 -> 511.60
2025-10-13 70 -> 67 502.34 -> 510.65
2025-10-04 70 497.10 -> 502.34

Riichi over Volga: 86% -> 71%
2025-09-14 71 -> 70 496.71 -> 497.10

Guardian of the Winds: 86% -> 71%
2025-09-12 73 -> 71 497.28 -> 496.71

X Russian Championship: 71% -> 57%
2025-09-03 75 -> 73 497.28
2025-09-01 78 -> 75 490.11 -> 497.28
2025-08-31 71 -> 78 490.11
2025-08-09 72 -> 71 490.11
2025-08-04 76 -> 72 483.04 -> 490.11

Riichi over Volga: 100% -> 86%

Tournaments

# Base rank Date Place Power Coefficient Type 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 🥇 1/32 100% 3.10 RR Moscow Open Riichi Marathon Moscow
4 114 2024-08-04 71/80 71% 3.65 RR Riichi over Volga Samara
5 191 2024-07-14 39/48 71% 2.80 RR Guardian of the Winds Yekaterinburg
6 215 2024-05-12 85/108 57% 4.60 RR X Russian Championship Perm