Boiko Bogdan

From Kirov, Russia

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Common russian riichi rating (CRR)

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

55 place (574.54).

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 + 736.84 * 1.50 * 0.57 + 1000 * 3.10 * 0.57 + 925.37 * 4.10 * 1 + 46.51 * 3 * 1 + 666.67 * 2.90 * 1) / (2.80 * 0.14 + 3.65 * 0.29 + 1.50 * 0.57 + 3.10 * 0.57 + 4.10 * 1 + 3 * 1 + 2.90 * 1) = 601.590535104448

p2 = (925.37 * 4.10 * 1 + 666.67 * 2.90 * 1 + 1000 * 3.10 * 0.57 + 736.84 * 1.50 * 0.57) / max_coefficients = 547.4915824915826

score = 601.590535104448 * 0.5 + 547.4915824915826 * 0.5 = 574.5410587980152

Rating changes

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all results
Date Place Points Reason
2026-05-14 57 -> 55 568.88 -> 574.54

Guardian of the Winds: 29% -> 14%
2026-05-12 59 -> 57 560.72 -> 568.88

X Russian Championship: 14% -> 0%
2026-05-11 58 -> 59 560.72
2026-05-07 53 -> 58 581.70 -> 560.72

Moscow Open Riichi Marathon: 71% -> 57%
2026-05-04 52 -> 53 588.04 -> 581.70

Dirty Riichi: 71% -> 57%
2026-05-03 50 -> 52 586.07 -> 588.04
2026-04-16 51 -> 50 586.07
2026-04-11 49 -> 51 586.07
2026-04-05 44 -> 49 586.07
2026-04-04 49 -> 44 578.49 -> 586.07

Riichi over Volga: 43% -> 29%

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 667 2025-12-07 6/16 100% 2.90 CRR Discard League Autumn Season 2025 Kirov
2 47 2025-08-03 42/44 100% 3.00 RR Two roosters and Chuckles Kirov
3 925 2025-06-15 6/68 100% 4.10 RR 13 bloody tiles Perm
4 1000 2025-01-07 🥇 1/32 57% 3.10 RR Moscow Open Riichi Marathon Moscow
5 737 2025-01-04 6/20 57% 1.50 CRR Dirty Riichi Kirov
6 114 2024-08-04 71/80 29% 3.65 RR Riichi over Volga Samara
7 191 2024-07-14 39/48 14% 2.80 RR Guardian of the Winds Yekaterinburg
8 215 2024-05-12 85/108 0% 4.60 RR X Russian Championship Perm