Ivshin Sergei

From Kirov, Russia

Common russian riichi rating (CRR)

Rating date Sept. 5, 2025 (latest changes Sept. 5, 2025).

183 place (269.45).

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

p1 = (578.95 * 1.50 * 1 + 604.65 * 3 * 1 + 0 + 0 + 0) / (1.50 * 1 + 3 * 1 + 1 + 1 + 1) = 357.64933333333335

p2 = (604.65 * 3 * 1 + 578.95 * 1.50 * 1) / max_coefficients = 181.2412162162162

score = 357.64933333333335 * 0.5 + 181.2412162162162 * 0.5 = 269.44527477477476

all results

Date	Place	Points	Reason
2025-09-05	184 -> 183	269.45
2025-09-03	186 -> 184	269.45
2025-09-01	187 -> 186	267.06 -> 269.45
2025-08-31	183 -> 187	267.06
2025-08-26	185 -> 183	267.06
2025-08-25	186 -> 185	267.06
2025-08-04	186	266.20 -> 267.06
2025-08-03	181 -> 186	40.03 -> 266.20	Two roosters and Chuckles: 0% -> 100%
2024-03-10	178 -> 181	40.46 -> 40.03
2024-03-09	179 -> 178	40.46

#	Base rank	Date		Place	Power	Coefficient	Type	Tournament	City
1	605	2025-08-03		18/44	100%	3.00	RR	Two roosters and Chuckles	Kirov
2	579	2025-01-04		9/20	100%	1.50	CRR	Dirty Riichi	Kirov
3	200	2022-07-03		13/16	0%	1.20	CRR	Vyatka rooster	Kirov
4	343	2022-03-20		45/68	0%	3.50	RR	Tenpai can't buy happiness	Perm
5	600	2021-11-06		23/56	0%	3.30	RR	Kirov Tournament	Kirov
6	667	2020-03-08		14/40	0%	2.90	EMA	Big open chiitoitsu in a small tenpai	Kirov
7	259	2019-09-08		21/28	0%	2.60	RR	And yet the sinner collects tanyao	Kirov
8	711	2019-05-04		25/84	0%	4.20	EMA	Haru Shanten 2019	Perm
9	435	2019-03-09		14/24	0%	2.50	RR	Toi-Toi-man Tournament	Kirov
10	1000	2018-07-28	🥇	1/24	0%	1.40	RR	Seven ryanmens	Kirov