Ratnikova Anna

From Samara, Russia

Internal rating (RR)

Rating date Sept. 6, 2025 (latest changes Sept. 3, 2025).

28 place (670.06).

max_coefficients = (4.10 * 1 + 3.75 * 1 + 3.50 * 1 + 3.45 * 1) = 14.8

p1 = (644.86 * 4.60 * 0.71 + 329.11 * 3.65 * 0.86 + 821.05 * 3.85 * 0.86 + 833.33 * 2.60 * 1 + 885.71 * 3.50 * 1 + 418.60 * 3 * 1) / (4.60 * 0.71 + 3.65 * 0.86 + 3.85 * 0.86 + 2.60 * 1 + 3.50 * 1 + 3 * 1) = 658.0349877192712

p2 = (885.71 * 3.50 * 1 + 821.05 * 3.85 * 0.86 + 833.33 * 2.60 * 1 + 644.86 * 4.60 * 0.71) / max_coefficients = 682.0864864864865

score = 658.0349877192712 * 0.5 + 682.0864864864865 * 0.5 = 670.0607371028789

Rating changes

Show

all results

Date	Place	Points	Reason
2025-09-03	31 -> 28	666.84 -> 670.06	SPB Riichi Open 2023: 14% -> 0%
2025-09-01	27 -> 31	675.06 -> 666.84	SPB Riichi Open 2024: 100% -> 86%
2025-08-31	26 -> 27	675.06
2025-08-09	27 -> 26	675.06
2025-08-04	30 -> 27	667.50 -> 675.06	Riichi over Volga: 100% -> 86%
2025-08-03	20 -> 30	687.20 -> 667.50	Two roosters and Chuckles: 0% -> 100%
2025-07-30	21 -> 20	687.20
2025-07-14	22 -> 21	687.20
2025-07-12	18 -> 22	693.54 -> 687.20	X Russian Championship: 86% -> 71%
2025-07-10	19 -> 18	693.54

Tournaments

#	Base rank	Date	Place	Power	Coefficient	Type	Tournament	City
1	419	2025-08-03	26/44	100%	3.00	RR	Two roosters and Chuckles	Kirov
2	886	2025-05-03	9/71	100%	3.50	RR	Riichi over The Volga 2025	Samara
3	833	2025-01-26	8/43	100%	2.60	RR	Riichi On Ice	Samara
4	821	2024-09-01	18/96	86%	3.85	RR	SPB Riichi Open 2024	Saint Petersburg
5	329	2024-08-04	54/80	86%	3.65	RR	Riichi over Volga	Samara
6	645	2024-05-12	39/108	71%	4.60	RR	X Russian Championship	Perm
7	439	2023-09-03	61/108	0%	4.00	RR	SPB Riichi Open 2023	Saint Petersburg
8	552	2023-06-11	40/88	0%	3.75	RR	Money can not buy tenpai	Perm
9	600	2022-11-06	31/76	0%	4.20	RR	IX Russian Riichi Championship	Perm
10	586	2022-06-12	47/112	0%	4.05	RR	Moscow Riichi 2022	Moscow
11	198	2018-11-18	74/92	0%	3.80	EMA	VII Russian Riichi Championship "Aki Shanten"	Perm