Ratnikova Anna

From Samara, Russia

EMA: 15990370

Player page

Internal rating (RR)

Rating date May 28, 2023 (latest changes May 28, 2023).

42 place (412.74).

max_coefficients = (4.20 * 1 + 4.05 * 1 + 3.50 * 0.71 + 3.10 * 0.57) = 12.52139

p1 = (585.59 * 4.05 * 1 + 600 * 4.20 * 1 + 0 + 0 + 0) / (4.05 * 1 + 4.20 * 1 + 1 + 1 + 1) = 434.81066666666663

p2 = (600 * 4.20 * 1 + 585.59 * 4.05 * 1) / max_coefficients = 390.6611007244403

score = 434.81066666666663 * 0.5 + 390.6611007244403 * 0.5 = 412.73588369555347

Rating changes

Show

all results
Date Place Points Reason
2023-05-28 43 -> 42 409.67 -> 412.74
2023-05-20 45 -> 43 402.40 -> 409.67
2023-04-19 46 -> 45 399.06 -> 402.40
2023-03-28 49 -> 46 395.75 -> 399.06
2023-03-20 49 389.47 -> 395.75
2023-03-06 51 -> 49 389.47
2023-02-19 53 -> 51 387.17 -> 389.47
2023-01-28 54 -> 53 383.71 -> 387.17
2023-01-06 56 -> 54 383.71
2022-12-19 56 382.11 -> 383.71

Tournaments

# Base rank Date Place Power Coefficient Type Tournament
1 600 2022-11-06 31/76 100% 4.20 RR IX Russian Riichi Championship
2 586 2022-06-12 47/112 100% 4.05 RR Moscow Riichi 2022
3 198 2018-11-18 74/92 0% 3.80 EMA VII Russian Riichi Championship "Aki Shanten"