Sobolev Sergei

From Izhevsk, Russia

Player page

Common russian riichi rating (CRR)

Rating date Sept. 7, 2026 (latest changes Sept. 7, 2026).

220 place (275.00).

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

p1 = (368.42 * 1.30 * 1 + 333.33 * 1.60 * 1 + 733.33 * 2.30 * 1 + 0 + 0) / (1.30 * 1 + 1.60 * 1 + 2.30 * 1 + 1 + 1) = 374.85416666666663

p2 = (733.33 * 2.30 * 1 + 333.33 * 1.60 * 1 + 368.42 * 1.30 * 1) / max_coefficients = 175.14276443867618

score = 374.85416666666663 * 0.5 + 175.14276443867618 * 0.5 = 274.9984655526714

Rating changes

Show

all results
Date Place Points Reason
2026-09-02 221 -> 220 275.00
2026-09-01 224 -> 221 275.00
2026-08-31 228 -> 224 274.72 -> 275.00
2026-08-30 226 -> 228 274.72
2026-08-16 218 -> 226 274.72
2026-08-15 219 -> 218 274.08 -> 274.72
2026-08-14 220 -> 219 274.08
2026-08-13 222 -> 220 274.08
2026-08-04 225 -> 222 274.08
2026-08-03 226 -> 225 274.08

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 733 2026-05-31 5/16 100% 2.30 CRR Nagashi mangal Izhevsk
2 333 2026-03-21 11/16 100% 1.60 CRR Grief from Uma Izhevsk
3 368 2026-01-03 13/20 100% 1.30 CRR The Birth of the Club Izhevsk