Boiko Bogdan

From Kirov, Russia

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Common russian riichi rating (CRR)

Rating date Sept. 21, 2026 (latest changes Sept. 17, 2026).

97 place (496.64).

max_coefficients = (4.71 * 1 + 3.90 * 1 + 3.40 * 1 + 3.40 * 1) = 15.41

p1 = (736.84 * 1.50 * 0.29 + 1000 * 3.10 * 0.29 + 925.37 * 4.10 * 0.71 + 46.51 * 3 * 0.86 + 666.67 * 2.90 * 1) / (1.50 * 0.29 + 3.10 * 0.29 + 4.10 * 0.71 + 3 * 0.86 + 2.90 * 1) = 613.9960778863822

p2 = (925.37 * 4.10 * 0.71 + 666.67 * 2.90 * 1 + 1000 * 3.10 * 0.29 + 736.84 * 1.50 * 0.29) / max_coefficients = 379.28942245295264

score = 613.9960778863822 * 0.5 + 379.28942245295264 * 0.5 = 496.6427501696674

Rating changes

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all results
Date Place Points Reason
2026-09-07 85 -> 97 519.43 -> 496.64

Moscow Open Riichi Marathon: 43% -> 29%
2026-09-06 83 -> 85 519.43
2026-09-04 81 -> 83 525.65 -> 519.43

Dirty Riichi: 43% -> 29%
2026-08-31 81 524.98 -> 525.65
2026-08-30 80 -> 81 524.98
2026-08-16 73 -> 80 524.98
2026-08-15 69 -> 73 548.65 -> 524.98

13 bloody tiles: 86% -> 71%
2026-08-13 70 -> 69 548.65
2026-08-08 71 -> 70 548.65
2026-08-04 72 -> 71 536.51 -> 548.65

Riichi over Volga: 14% -> 0%

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 86% 3.00 RR Two roosters and Chuckles Kirov
3 925 2025-06-15 6/68 71% 4.10 RR 13 bloody tiles Perm
4 1000 2025-01-07 🥇 1/32 29% 3.10 RR Moscow Open Riichi Marathon Moscow
5 737 2025-01-04 6/20 29% 1.50 CRR Dirty Riichi Kirov
6 114 2024-08-04 71/80 0% 3.65 RR Riichi over Volga Samara
7 191 2024-07-14 39/48 0% 2.80 RR Guardian of the Winds Yekaterinburg
8 215 2024-05-12 85/108 0% 4.60 RR X Russian Championship Perm