Boiko Bogdan

From Kirov, Russia

Player page

Internal rating (RR)

Rating date July 25, 2026 (latest changes July 18, 2026).

110 place (408.64).

max_coefficients = (4.71 * 1 + 3.90 * 1 + 4.10 * 0.86 + 3.45 * 1) = 15.574109999999997

p1 = (113.92 * 3.65 * 0.14 + 1000 * 3.10 * 0.43 + 925.37 * 4.10 * 0.86 + 46.51 * 3 * 1 + 0) / (3.65 * 0.14 + 3.10 * 0.43 + 4.10 * 0.86 + 3 * 1 + 1) = 510.3896637835708

p2 = (925.37 * 4.10 * 0.86 + 1000 * 3.10 * 0.43 + 46.51 * 3 * 1 + 113.92 * 3.65 * 0.14) / max_coefficients = 306.8855941045749

score = 510.3896637835708 * 0.5 + 306.8855941045749 * 0.5 = 408.63762894407284

Rating changes

Show

all results
Date Place Points Reason
2026-07-18 109 -> 110 408.64
2026-07-14 97 -> 109 431.03 -> 408.64

Guardian of the Winds: 14% -> 0%
2026-07-13 98 -> 97 431.03
2026-07-12 96 -> 98 431.03
2026-07-07 88 -> 96 455.96 -> 431.03

Moscow Open Riichi Marathon: 57% -> 43%
2026-06-26 89 -> 88 455.96
2026-06-16 88 -> 89 455.96
2026-06-15 81 -> 88 477.10 -> 455.96

13 bloody tiles: 100% -> 86%
2026-06-14 63 -> 81 492.88 -> 477.10
2026-06-13 64 -> 63 492.88

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 86% 4.10 RR 13 bloody tiles Perm
3 1000 2025-01-07 🥇 1/32 43% 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 0% 2.80 RR Guardian of the Winds Yekaterinburg
6 215 2024-05-12 85/108 0% 4.60 RR X Russian Championship Perm