Via U1800 January

Open SwissStandard

50 players participated in this 6-round tournament, held from 17 Jan 2026 to 18 Jan 2026 in Seongnam, South Korea. 2 federations represented. Top 10 Elo average was 1736, and top seed was Inseo Jeon (🇰🇷 KOR, 1782).

Doyun A Lee (🇰🇷 KOR, 1633) won with 5.5/6, ahead of Jiho You (5.5) and Joohwan Kwak (5.0). Lee shared the lead from round 5, winning on tie-break.

The biggest upset came in round 3: Denis Yugay (1530) beat Inseo Jeon (1782), a +252-point gap.

Location

🇰🇷Seongnam, South Korea

Dates

17 Jan 2026 → 18 Jan 2026

Time control

Standard: 30 minutes for game with 30 seconds increment from move 1

System

Swiss · 6 rounds

Top seed

🇰🇷Inseo Jeon1782

Avg top 10

1,736

Participants

Federations · 2 represented

🇰🇷South Korea×44

🇺🇿Uzbekistan×1

Top 3

🥇
Doyun A Lee
🇰🇷KOR·1633
5.5pts·2023perf+86.0
🥈
Jiho You
🇰🇷KOR·1759
5.5pts·2032perf+28.0
🥉
Joohwan Kwak
🇰🇷KOR·1668
5.0pts·1829perf+39.6

How it unfolded

Top 6 · 6 rounds

Tight race until R6; 2 players tied at 5.5/6, decided on Buchholz.

Co-leaders

You5.5Lee5.5Kwak5Hur4.5Li4Lee4

R6 · TIEBREAK CLUSTER

2 players finish on 5.5/6. Lee takes the title on Buchholz Cut1 (22.0).

R2 · HEAD-TO-HEAD · WINNER VS 2ND

Jiho You drew with Doyun A Lee (White).

WIN STREAKS · 3 top finishers

Jiho You 4 wins (R3–R6)Doyun A Lee 4 wins (R3–R6)Joohwan Kwak 4 wins (R1–R4)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Jiho You	*	½	—	—
2Doyun A Lee	½	*	1	1
3Joohwan Kwak	—	0	*	—
4Jiyu Hur	—	0	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	Pts	Bu C1	Bu	SB	Perf	Δ
1	Lee, Doyun A	1633	KOR	+48B	=2N	+4B	+16N	+3B	+5N	5.5	22.0	22.0	19.25	2023	+86.0
2	You, Jiho	1759	KOR	+18N	=1B	+38N	+12N	+7B	+6B	5.5	20.0	21.5	18.75	2032	+28.0
3	Kwak, Joohwan	1668	KOR	+42N	+20B	+28N	+5B	−1N	+13B	5.0	18.0	19.0	13.50	1829	+39.6
4	Hur, Jiyu	1634	KOR	=38N	+33B	−1N	+25B	+15B	+12N	4.5	16.5	18.0	11.75	1645	+1.2
5	Park, Jonggeon	1639	KOR	+44B	+7N	+8B	−3N	+10B	−1B	4.0	22.5	23.5	13.00	1771	+43.2
6	Kim, Minjae	1769	KOR	+19B	−16N	+18B	+17N	+9B	−2N	4.0	18.5	21.5	13.00	1691	-8.8
7	Li, Artem Serg	1773	KOR	+45N	−5B	+20N	+21B	−2N	+22B	4.0	18.5	19.5	10.00	1724	-13.2
8	Lee, Jinwoo	1723	KOR	+30N	+21B	−5N	−13B	+19N	+18N	4.0	16.5	18.5	11.00	1681	-10.8
9	Lee, Junseo	1655	KOR	+41N	+17B	−24N	+28B	−6N	+15B	4.0	15.0	16.0	9.00	1572	-13.2
10	Jang, Junyoung	1709	KOR	+46N	−28B	+30N	+19B	−5N	+21B	4.0	14.0	15.0	9.00	1634	-9.0
11	Kim, Jihoon	1696	KOR	−29B	+43N	+44B	−15N	+16B	+17N	4.0	12.0	13.0	8.00	2416	+15.6
12	Choi, Jungwoon	1656	KOR	+43B	+29N	+15N	−2B	=13N	−4B	3.5	18.5	19.5	7.75	1390	-38.8
13	Park, Chabeen	1598	KOR	−15B	+49N	+32B	+8N	=12B	−3N	3.5	17.5	17.5	7.75	1679	+13.2
14	Yoon, Sungtak	1649	KOR	−17B	=41N	=22B	=29N	+26B	+25N	3.5	13.0	14.0	8.00	1556	-5.2
15	So, Jeemin	0	KOR	+13N	+34N	−12B	+11B	−4N	−9N	3.0	19.5	21.5	9.50	1647	0.0
16	Mirzaiev, Tymur	1616	KOR	+31N	+6B	=27N	−1B	−11N	=23B	3.0	19.0	21.0	8.75	1646	+7.6
17	Kim, Suhyun	0	KOR	+14N	−9N	+34B	−6B	+28N	−11B	3.0	17.5	19.5	7.50	1664	0.0
18	Lee, Jaemyung	1500	KOR	−2B	+48N	−6N	+35B	+34N	−8B	3.0	17.5	17.5	4.00	1530	+4.8
19	Yugay, Denis	1530	UZB	−6N	+31B	+23N	−10N	−8B	+28B	3.0	17.0	19.0	7.00	1636	+17.6
20	Jang, Minki	1535	KOR	+23N	−3N	−7B	−31B	+35N	+33B	3.0	16.0	18.0	7.00	1613	+11.6
21	Kim, Keonwoo	1615	KOR	+50B	−8N	+29B	−7N	+32B	−10N	3.0	16.0	16.0	4.00	932	-39.2
22	Bae, Dohyun	1557	KOR	=33N	−38B	=14N	+41B	+31N	−7N	3.0	13.0	14.0	5.75	1518	-3.6
23	Jeon, Inseo	1782	KOR	−20B	+42N	−19B	=26N	+38B	=16N	3.0	13.0	14.0	5.25	1296	-71.6
24	Kim, Taewoo	1755	KOR	+47B	+39N	+9B	F	F	F	3.0	6.5	6.5	6.50	2375	+32.8
25	Wi, Seungbeen	0	KOR	−36B	+26N	=39B	−4N	+29B	−14B	2.5	14.5	16.0	5.25	1296	0.0
26	Kim, Rian	0	KOR	−27N	−25B	+48N	=23B	−14N	+38B	2.5	13.0	13.0	3.00	1443	0.0
27	Ock, Seungheon	1722	KOR	+26B	+36N	=16B	F	F	F	2.5	7.5	7.5	6.00	1795	+7.2
28	Lim, Jiseong	1572	KOR	+32B	+10N	−3B	−9N	−17B	−19N	2.0	19.0	21.0	6.00	1454	-11.6
29	Dong, Thi Thanh Thao	0	KOR	+11N	−12B	−21N	=14B	−25N	=30B	2.0	16.5	18.5	6.75	1540	0.0
30	Lee, Jeongmin	1464	KOR	−8B	+50N	−10B	−32N	=40B	=29N	2.0	13.5	13.5	1.75	912	-14.8
31	Lee, Woojin C	0	KOR	−16B	−19N	+42B	+20N	−22B	−?N	2.0	13.0	13.0	4.00	1332	0.0
32	Yun, Junseo	0	KOR	−28N	+46B	−13N	+30B	−21N	−34B	2.0	12.5	13.5	3.00	1336	0.0
33	Yun, Sanghoon	0	KOR	=22B	−4N	=41B	−?N	+43B	−20N	2.0	12.5	12.5	3.00	1297	0.0
34	Park, Gwanyong	1642	KOR	+49N	−15B	−17N	F	−18B	+32N	2.0	12.5	12.5	2.00	701	-28.0
35	Park, Kangmin	0	KOR	−39B	+47N	−36B	−18N	−20B	+43N	2.0	10.5	11.5	2.00	1297	0.0
36	Son, Juwon	1596	KOR	+25N	−27B	+35N	F	F	F	2.0	7.0	7.0	4.50	921	-11.5
37	Khan, Vassiliy	0	KOR	F	F	F	−?N	+48B	+40N	2.0	1.5	1.5	1.50	800	0.0
38	Lee, Hyungmin	0	KOR	=4B	+22N	−2B	F	−23N	−26N	1.5	18.5	20.5	5.25	1594	0.0
39	Kwak, Jeonghwan	1598	KOR	+35N	−24B	=25N	F	F	F	1.5	7.5	7.5	3.25	954	-12.0
40	FIDE 13230883	0	—	F	F	F	+42B	=30N	−37B	1.5	5.0	5.0	2.00	1459	0.0
41	FIDE 13234544	0	—	−9B	=14B	=33N	−22N	−?B	−42N	1.0	13.5	13.5	2.75	1293	0.0
42	Hidayat, Anton	0	KOR	−3B	−23B	−31N	−40N	F	+41B	1.0	12.5	12.5	1.00	921	0.0
43	FIDE 13237772	0	—	−12N	−11B	−45N	+48B	−33N	−35B	1.0	12.5	12.5	0.00	827	0.0
44	Lee, Hyeongyu	0	KOR	−5N	+45B	−11N	F	F	F	1.0	9.0	9.0	1.00	1488	0.0
45	Kim, Seungyu	1533	KOR	−7B	−44N	+43B	F	F	F	1.0	6.0	6.0	1.00	973	-8.0
46	FIDE 382104790	0	—	−10B	−32N	+50B	F	F	F	1.0	6.0	6.0	0.00	907	0.0
47	Kim, Geono	1469	KOR	−24N	−35B	+49B	F	F	F	1.0	5.0	5.0	0.00	954	-6.4
48	Lee, Junseo A	0	KOR	−1N	−18B	−26B	−43N	−37N	F	0.0	14.0	14.0	0.00	768	0.0
49	Kwon, Eunchan	0	KOR	−34B	−13B	−47N	F	F	F	0.0	6.5	6.5	0.00	771	0.0
50	FIDE 13238990	0	—	−21N	−30B	−46N	F	F	F	0.0	6.0	6.0	0.00	731	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Lee, Doyun AKOR
+86.0
5.5 pts · #2
2Park, JonggeonKOR
+43.2
4.0 pts · #8
3Kwak, JoohwanKOR
+39.6
5.0 pts · #4

Top rating losers

1Jeon, InseoKOR
-71.6
3.0 pts · #30
2Kim, KeonwooKOR
-39.2
3.0 pts · #40
3Choi, JungwoonKOR
-38.8
3.5 pts · #31

Biggest upsets

R3+252 Elo gap
Yugay, Denis1530 beat Jeon, Inseo1782
R1+247 Elo gap
Jang, Minki1535 beat Jeon, Inseo1782
R2+153 Elo gap
Mirzaiev, Tymur1616 beat Kim, Minjae1769