Boiko Bogdan

From Kirov, Russia

Player page

Internal rating (RR)

Rating date June 15, 2025 (latest changes June 15, 2025).

65 place (511.66).

max_coefficients = (4.10 * 1 + 4.60 * 0.86 + 3.85 * 1 + 3.75 * 1) = 15.64266

p1 = (214.95 * 4.60 * 0.86 + 191.49 * 2.80 * 1 + 113.92 * 3.65 * 1 + 1000 * 3.10 * 1 + 925.37 * 4.10 * 1) / (4.60 * 0.86 + 2.80 * 1 + 3.65 * 1 + 3.10 * 1 + 4.10 * 1) = 494.1555171304397

p2 = (925.37 * 4.10 * 1 + 1000 * 3.10 * 1 + 214.95 * 4.60 * 0.86 + 191.49 * 2.80 * 1) / max_coefficients = 529.1740663033014

score = 494.1555171304397 * 0.5 + 529.1740663033014 * 0.5 = 511.6647917168706

Rating changes

Show

all results
Date Place Points Reason
2025-06-15 120 -> 65 330.28 -> 511.66

13 bloody tiles: 0% -> 100%
2025-06-11 123 -> 120 330.28
2025-05-12 124 -> 123 325.38 -> 330.28

X Russian Championship: 100% -> 86%
2025-05-10 125 -> 124 325.38
2025-05-03 123 -> 125 325.38
2025-04-26 119 -> 123 325.38
2025-04-11 120 -> 119 325.38
2025-03-03 121 -> 120 325.38
2025-03-02 117 -> 121 325.38
2025-02-16 110 -> 117 325.38

Tournaments

# Base rank Date Place Power Coefficient Type Tournament City
1 925 2025-06-15 6/68 100% 4.10 RR 13 bloody tiles Perm
2 1000 2025-01-07 1/32 100% 3.10 RR Moscow Open Riichi Marathon Moscow
3 114 2024-08-04 71/80 100% 3.65 RR Riichi over Volga Samara
4 191 2024-07-14 39/48 100% 2.80 RR Guardian of the Winds Yekaterinburg
5 215 2024-05-12 85/108 86% 4.60 RR X Russian Championship Perm