USHAKOV Igor

From Moscow, Russia

EMA: 15990490

Player page

Common russian riichi rating (CRR)

Rating date Oct. 9, 2026 (latest changes Oct. 8, 2026).

280 place (199.65).

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

p1 = (697.67 * 3 * 0.71 + 51.95 * 3.45 * 0.86 + 216.78 * 4.71 * 1 + 0 + 0) / (3 * 0.71 + 3.45 * 0.86 + 4.71 * 1 + 1 + 1) = 226.05704792464283

p2 = (697.67 * 3 * 0.71 + 216.78 * 4.71 * 1 + 51.95 * 3.45 * 0.86) / max_coefficients = 173.24529526281634

score = 226.05704792464283 * 0.5 + 173.24529526281634 * 0.5 = 199.6511715937296

Rating changes

Show

all results
Date Place Points Reason
2026-10-03 268 -> 280 217.60 -> 199.65

Two roosters and Chuckles: 86% -> 71%
2026-10-02 269 -> 268 217.60
2026-09-26 268 -> 269 217.60
2026-09-17 269 -> 268 217.60
2026-09-15 270 -> 269 217.60
2026-09-06 262 -> 270 217.60
2026-09-01 266 -> 262 217.60
2026-08-31 269 -> 266 214.43 -> 217.60

SPB Riichi Open 2025: 100% -> 86%
2026-08-30 267 -> 269 214.43
2026-08-16 265 -> 267 214.43

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 217 2026-06-14 113/144 100% 4.71 RR XII Russian Championship Samara
2 52 2025-08-31 74/78 86% 3.45 RR SPB Riichi Open 2025 Saint Petersburg
3 698 2025-08-03 14/44 71% 3.00 RR Two roosters and Chuckles Kirov