Boiko Bogdan

From Kirov, Russia

Player page

Internal rating (RR)

Rating date June 15, 2026 (latest changes June 14, 2026).

81 place (477.10).

max_coefficients = (4.71 * 1 + 4.10 * 1 + 3.90 * 1 + 3.45 * 1) = 16.16

p1 = (191.49 * 2.80 * 0.14 + 113.92 * 3.65 * 0.14 + 1000 * 3.10 * 0.57 + 925.37 * 4.10 * 1 + 46.51 * 3 * 1) / (2.80 * 0.14 + 3.65 * 0.14 + 3.10 * 0.57 + 4.10 * 1 + 3 * 1) = 596.4375738087592

p2 = (925.37 * 4.10 * 1 + 1000 * 3.10 * 0.57 + 46.51 * 3 * 1 + 191.49 * 2.80 * 0.14) / max_coefficients = 357.7673267326732

score = 596.4375738087592 * 0.5 + 357.7673267326732 * 0.5 = 477.1024502707162

Rating changes

Show

all results
Date Place Points Reason
2026-06-14 63 -> 81 492.88 -> 477.10
2026-06-13 64 -> 63 492.88
2026-06-09 65 -> 64 492.88
2026-06-04 68 -> 65 482.11 -> 492.88

Riichi over Volga: 29% -> 14%
2026-06-02 67 -> 68 482.11
2026-05-26 66 -> 67 482.11
2026-05-14 71 -> 66 476.17 -> 482.11

Guardian of the Winds: 29% -> 14%
2026-05-12 75 -> 71 466.32 -> 476.17

X Russian Championship: 14% -> 0%
2026-05-07 70 -> 75 489.89 -> 466.32

Moscow Open Riichi Marathon: 71% -> 57%
2026-05-03 70 488.47 -> 489.89

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 57% 3.10 RR Moscow Open Riichi Marathon Moscow
4 114 2024-08-04 71/80 14% 3.65 RR Riichi over Volga Samara
5 191 2024-07-14 39/48 14% 2.80 RR Guardian of the Winds Yekaterinburg
6 215 2024-05-12 85/108 0% 4.60 RR X Russian Championship Perm