Boiko Bogdan

From Kirov, Russia

Player page

Internal rating (RR)

Rating date May 24, 2026 (latest changes May 17, 2026).

66 place (482.11).

max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.45 * 1 + 3.40 * 1) = 14.85

p1 = (191.49 * 2.80 * 0.14 + 113.92 * 3.65 * 0.29 + 1000 * 3.10 * 0.57 + 925.37 * 4.10 * 1 + 46.51 * 3 * 1) / (2.80 * 0.14 + 3.65 * 0.29 + 3.10 * 0.57 + 4.10 * 1 + 3 * 1) = 572.054334458151

p2 = (925.37 * 4.10 * 1 + 1000 * 3.10 * 0.57 + 46.51 * 3 * 1 + 113.92 * 3.65 * 0.29) / max_coefficients = 392.1683501683502

score = 572.054334458151 * 0.5 + 392.1683501683502 * 0.5 = 482.1113423132506

Rating changes

Show

all results
Date Place Points Reason
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
2026-05-01 71 -> 70 488.47
2026-04-19 72 -> 71 488.47
2026-04-11 70 -> 72 488.47
2026-04-05 72 -> 70 488.47
2026-04-04 76 -> 72 480.38 -> 488.47

Riichi over Volga: 43% -> 29%
2026-03-14 77 -> 76 477.52 -> 480.38

Guardian of the Winds: 43% -> 29%

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 29% 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