Zarezin Ivan

From Yekaterinburg, Russia

EMA: 15020003

Player page

Common russian riichi rating (CRR)

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

90 place (454.79).

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

p1 = (851.85 * 2.30 * 0.29 + 401.87 * 4.60 * 0.43 + 808.51 * 2.80 * 0.57 + 873.42 * 3.65 * 0.57 + 0) / (2.30 * 0.29 + 4.60 * 0.43 + 2.80 * 0.57 + 3.65 * 0.57 + 1) = 610.761258921003

p2 = (873.42 * 3.65 * 0.57 + 808.51 * 2.80 * 0.57 + 401.87 * 4.60 * 0.43 + 851.85 * 2.30 * 0.29) / max_coefficients = 298.81137123745816

score = 610.761258921003 * 0.5 + 298.81137123745816 * 0.5 = 454.7863150792306

Rating changes

Show

all results
Date Place Points Reason
2025-12-07 88 -> 90 454.79
2025-12-06 87 -> 88 454.79
2025-12-04 80 -> 87 478.76 -> 454.79

Riichi over Volga: 71% -> 57%
2025-11-30 78 -> 80 478.76
2025-11-22 77 -> 78 478.76
2025-11-14 74 -> 77 493.96 -> 478.76

Guardian of the Winds: 71% -> 57%
2025-11-12 76 -> 74 494.11 -> 493.96

X Russian Championship: 57% -> 43%
2025-11-10 77 -> 76 494.11
2025-11-04 64 -> 77 541.85 -> 494.11
2025-11-01 65 -> 64 541.18 -> 541.85

Tournaments

# Base rank Date Place Power Coefficient Rating Tournament City
1 873 2024-08-04 11/80 57% 3.65 RR Riichi over Volga Samara
2 809 2024-07-14 10/48 57% 2.80 RR Guardian of the Winds Yekaterinburg
3 402 2024-05-12 65/108 43% 4.60 RR X Russian Championship Perm
4 852 2024-02-25 5/28 29% 2.30 CRR Chasing Kan Yekaterinburg
5 704 2023-11-05 9/28 0% 2.30 CRR Finding Dora Yekaterinburg
6 632 2023-08-27 8/20 0% 2.10 CRR 13 tiles until tempai Yekaterinburg
7 540 2023-06-11 41/88 0% 3.75 RR Money can not buy tenpai Perm
8 440 2022-11-06 43/76 0% 4.20 RR IX Russian Riichi Championship Perm
9 358 2022-03-20 44/68 0% 3.50 RR Tenpai can't buy happiness Perm
10 984 2019-11-04 🥈 2/64 0% 3.85 EMA Aki Shanten 2019 Perm
11 455 2019-07-06 7/12 0% 1.50 CRR Perm Half Marathon Perm
12 174 2019-06-16 20/24 0% 2.20 RR URAL Mahjong Battle Yekaterinburg
13 84 2019-05-04 77/84 0% 4.20 EMA Haru Shanten 2019 Perm
14 473 2019-01-05 30/56 0% 3.00 EMA Snow Dragon Novosibirsk
15 363 2018-11-18 59/92 0% 3.80 EMA VII Russian Riichi Championship "Aki Shanten" Perm
16 704 2018-08-11 9/28 0% 1.70 RR Natsu Shanten 2018 Perm
17 479 2018-05-01 38/72 0% 3.85 EMA Haru Shanten 2018 Perm
18 789 2018-03-18 5/20 0% 2.10 CRR Spring tournament (Ekaterinburg) Yekaterinburg
19 789 2018-02-24 5/20 0% 2.10 CRR Guard of the tenpai Tyumen
20 366 2017-11-12 46/72 0% 3.25 EMA Perm Riichi 2017 Aki Shanten Perm
21 261 2017-07-30 18/24 0% 2.20 RR Summer EMA rules tournament 2017 Yekaterinburg
22 741 2017-06-11 8/28 0% 2.10 RR Tyumen Mahjong Tournament (TMT) 2017 Tyumen
23 111 2017-03-25 25/28 0% 1.50 RR "Spring shanten" tournament, Perm 2017 Perm
24 696 2017-01-29 8/24 0% 2.20 RR The first tournament of 2017 Yekaterinburg
25 543 2017-01-05 17/36 0% 2.50 RR Quick discard 2017 Novosibirsk
26 600 2016-07-17 7/16 0% 1.60 RR "Legendary player" riichi mahjong tournament 2016 Tyumen
27 484 2016-05-03 17/32 0% 2.40 RR Siberia Cup 2016 Novosibirsk
28 384 2016-03-13 62/100 0% 3.40 RR "Japanese House" riichi mahjong cup 2016 Moscow
29 947 2016-02-07 🥈 2/20 0% 1.70 RR "Tiles, doras, 2 renchans" Tyumen
30 478 2015-12-05 13/24 0% 1.80 RR 4 riichi mahjong tournament 2015 Yekaterinburg
31 667 2015-10-18 18/52 0% 2.90 EMA Russian Open Riichi Championship 2015 Vologda
32 421 2015-09-27 12/20 0% 1.70 RR Plitochka Tyumen
33 1000 2015-08-29 🥇 1/16 0% 1.60 RR 3 riichi mahjong tournament 2015 Yekaterinburg
34 333 2015-05-16 11/16 0% 1.60 RR 2 autumn riichi mahjong tournament 2015 Yekaterinburg
35 889 2015-02-22 4/28 0% 1.90 RR 2 winter riichi mahjong tournament 2015 Yekaterinburg
36 895 2014-10-25 🥉 3/20 0% 1.30 RR Autumn riichi mahjong tournament 2014 Yekaterinburg
37 158 2014-06-08 17/20 0% 1.30 RR Chelyabinsk riichi mahjong championship 2017 Chelyabinsk