Grigoryan Andrey

From Saint Petersburg, Russia

Player page

Internal rating (RR)

Rating date Dec. 10, 2025 (latest changes Dec. 9, 2025).

181 place (196.12).

max_coefficients = (4.10 * 1 + 3.90 * 1 + 3.50 * 1 + 3.45 * 1) = 14.95

p1 = (136.84 * 3.85 * 0.71 + 118.64 * 3.25 * 1 + 828.57 * 1.90 * 1 + 0 + 0) / (3.85 * 0.71 + 3.25 * 1 + 1.90 * 1 + 1 + 1) = 235.97848698820357

p2 = (828.57 * 1.90 * 1 + 118.64 * 3.25 * 1 + 136.84 * 3.85 * 0.71) / max_coefficients = 156.26755852842808

score = 235.97848698820357 * 0.5 + 156.26755852842808 * 0.5 = 196.1230227583158

Rating changes

Show

all results
Date Place Points Reason
2025-12-09 183 -> 181 196.12
2025-12-07 178 -> 183 196.12
2025-12-04 180 -> 178 196.12
2025-11-12 182 -> 180 196.12
2025-11-04 172 -> 182 199.67 -> 196.12
2025-11-01 172 199.40 -> 199.67

SPB Riichi Open 2024: 86% -> 71%
2025-10-13 173 -> 172 196.85 -> 199.40
2025-10-04 175 -> 173 196.85
2025-09-30 177 -> 175 196.85
2025-09-12 179 -> 177 196.85

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 829 2025-04-26 7/36 100% 1.90 RR Seihoku spring tournament 2025 Saint Petersburg
2 119 2025-02-16 53/60 100% 3.25 RR White Wolf Cup Saint Petersburg
3 137 2024-09-01 83/96 71% 3.85 RR SPB Riichi Open 2024 Saint Petersburg
4 360 2021-11-28 49/76 0% 3.45 RR Saint Petersburg Open 2021 Saint Petersburg