2026 Korea Youth Championship U12

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41 players participated in this 7-round tournament, held from 04 Feb 2026 to 07 Feb 2026 in Seongnam, South Korea. 2 federations represented. Top 10 Elo average was 1758, and top seed was Juwon Seo (🇰🇷 KOR, 1861).

Yugeon Lee (🇰🇷 KOR, 1664) won with 7.0/7, ahead of Artem Serg Li (5.5) and Eunhak Lee (5.5). Lee won solo starting round 5.

The biggest upset came in round 1: Juneho Choi (1519) beat Hajin Gim (1813), a +294-point gap.

Location

🇰🇷Seongnam, South Korea

Dates

04 Feb 2026 → 07 Feb 2026

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 7 rounds

Top seed

🇰🇷Juwon Seo1861

Avg top 10

1,758

Participants

Federations · 2 represented

🇰🇷South Korea×36

🇸🇪Sweden×1

Top 3

🥇
Yugeon Lee
🇰🇷KOR·1664
7.0pts·2505perf+155.6
🥈
Artem Serg Li
🇰🇷KOR·1761
5.5pts·1900perf+48.0
🥉
Eunhak Lee
🇰🇷KOR·1712
5.5pts·1907perf+64.8

How it unfolded

Top 6 · 7 rounds

Yugeon Lee led from R5; +1.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.

Co-leaders

Lee7Lee5.5Li5.5Jang5Lee5Seo5

R5–R7 · LEAD HELD

Yugeon Lee never relinquished the lead after R5; final gap +1.5 over the runner-up.

WIN STREAKS · 2 top finishers

Yugeon Lee 7 wins (R1–R7)Artem Serg Li 3 wins (R4–R6)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Yugeon Lee	*	—	1	1
2Eunhak Lee	—	*	—	½
3Artem Serg Li	0	—	*	½
4Seojun Jang	0	½	½	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	Pts	Bu C1	Bu	SB	Perf	Δ
1	Lee, Yugeon	1664	KOR	+24N	+15B	+2N	+4B	+5N	+12B	+8N	7.0	28.0	31.0	31.00	2505	+155.6
2	Li, Artem Serg	1761	KOR	+32B	+7N	−1B	+23N	+14B	+4N	=5B	5.5	29.0	31.5	22.00	1900	+48.0
3	Lee, Eunhak	1712	KOR	+34N	+13B	−4N	+22B	+6N	=5B	+9N	5.5	27.0	29.0	21.50	1907	+64.8
4	Seo, Juwon	1861	KOR	+10B	+20N	+3B	−1N	+9N	−2B	+12N	5.0	31.0	34.5	22.00	1832	-6.8
5	Jang, Seojun	1830	KOR	+27B	+18N	+14B	+8N	−1B	=3N	=2N	5.0	30.5	33.5	21.00	1841	+7.6
6	Lee, Kwanhoo	1659	KOR	+17B	−8N	+26B	+10N	−3B	+23N	+16B	5.0	25.5	28.5	18.50	1742	+32.8
7	Lee, Ruk	1588	KOR	+39N	−2B	+17N	−12B	+20B	+30N	+13B	5.0	23.5	24.5	15.00	1786	+64.0
8	Kim, Echae	1835	KOR	+25N	+6B	=9N	−5B	+21N	+22B	−1B	4.5	28.5	31.5	17.25	1769	-20.4
9	Lee, Dahyeon	1672	KOR	+31B	+33N	=8B	+21N	−4B	+14N	−3B	4.5	25.0	27.0	14.25	1761	+32.0
10	Bae, Joowon	1564	KOR	−4N	+24B	+37N	−6B	+31N	=11B	+22N	4.5	23.5	25.0	12.75	1678	+36.4
11	Hur, Jiyu	1702	KOR	+26B	−23N	−21B	+35N	+32B	=10N	+20B	4.5	20.0	22.0	13.25	1636	-18.4
12	Oh, Jeongmin	1687	KOR	=16B	=30N	+32B	+7N	+13B	−1N	−4B	4.0	27.5	30.0	14.75	1698	+3.6
13	Choe, Matthew Hajoon	1618	KOR	+35B	−3N	+16B	+33N	−12N	+15B	−7N	4.0	24.5	26.5	12.00	1526	-24.8
14	Sim, Yunwoo	1674	KOR	+36N	+19B	−5N	+31B	−2N	−9B	+27N	4.0	24.5	26.5	11.50	1659	-3.2
15	Choi, Juneho	1519	KOR	+30B	−1N	=20B	=18N	+33B	−13N	+23B	4.0	24.0	26.0	11.25	1653	+43.6
16	Park, Junhoo	1480	KOR	=12N	=25B	−13N	+37B	+27N	+19B	−6N	4.0	23.0	24.5	12.00	1600	+37.2
17	Lee, Hanjo	1441	KOR	−6N	+34B	−7B	−29N	+41B	+26N	+25B	4.0	21.0	21.0	8.00	1623	+50.8
18	Lee, Suhyuk	1614	KOR	+38N	−5B	−31N	=15B	=25N	+28B	+24N	4.0	20.5	22.0	11.00	1544	-20.8
19	Kim, Keonwoo	1575	KOR	+37B	−14N	+35B	−20N	+26B	−16N	+33B	4.0	18.5	20.0	8.50	1380	-38.0
20	Bae, Jaemin	1652	KOR	+29N	−4B	=15N	+19B	−7N	+21B	−11N	3.5	26.0	29.0	12.50	1595	-20.0
21	Yoo, Hanjoon	1700	KOR	+28N	=22B	+11N	−9B	−8B	−20N	+30B	3.5	23.5	26.0	11.75	1682	-3.6
22	Oh, Jaemin	1601	KOR	+40B	=21N	+23B	−3N	+30B	−8N	−10B	3.5	23.5	24.5	8.25	1641	+5.2
23	An, Teo	1569	SWE	+41N	+11B	−22N	−2B	+28N	−6B	−15N	3.0	25.5	25.5	7.50	1498	-22.4
24	Lim, Jihyuk	1444	KOR	−1B	−10N	+39B	−26N	+40B	+32N	−18B	3.0	22.0	23.0	4.50	1326	-28.4
25	Kim, Lucas Jiwon	1546	KOR	−8B	=16N	+40B	−30N	=18B	+31B	−17N	3.0	21.5	22.5	7.50	1478	-23.2
26	Kim, Geono	1487	KOR	−11N	+39B	−6N	+24B	−19N	−17B	+40N	3.0	21.5	22.5	5.00	1321	-40.0
27	Jung, Sihwan	1530	KOR	−5N	+29B	−33B	+40N	−16B	+39N	−14B	3.0	19.0	20.0	5.00	863	-40.0
28	Kim, Jiho A	1483	KOR	−21B	−35N	+29B	+41N	−23B	−18N	+36B	3.0	17.5	17.5	5.00	1390	-20.4
29	Cho, Yunki	0	KOR	−20B	−27N	−28N	+17B	=37N	=38B	+34N	3.0	17.0	18.5	7.50	1447	0.0
30	Gim, Hajin	1813	KOR	−15N	=12B	+34N	+25B	−22N	−7B	−21N	2.5	23.0	25.0	7.00	1488	-116.4
31	Park, Sihun	1452	KOR	−9N	+41B	+18B	−14N	−10B	−25N	=32B	2.5	22.5	22.5	5.25	1402	-13.6
32	Lee, Jiho	1511	KOR	−2N	+38B	−12N	+36B	−11N	−24B	=31N	2.5	21.5	23.0	4.75	1392	-38.4
33	Park, Siwoo D	0	KOR	F	−9B	+27N	−13B	−15N	+34B	−19N	2.0	21.5	21.5	5.00	1438	0.0
34	Lee, Donghwa	1488	KOR	−3B	−17N	−30B	+38N	+35B	−33N	−29B	2.0	19.0	20.5	3.50	855	-36.8
35	Choe, Yujin	0	KOR	−13N	+28B	−19N	−11B	−34N	+41B	F	2.0	17.5	17.5	3.00	1332	0.0
36	Lee, Hyeonjun	1478	KOR	−14B	−40N	+38B	−32N	−39N	+37B	−28N	2.0	13.5	14.5	3.00	760	-46.0
37	FIDE 13238345	0	—	−19N	F	−10B	−16N	=29B	−36N	+39B	1.5	18.5	18.5	2.50	721	0.0
38	FIDE 13237977	0	—	−18B	−32N	−36N	−34B	F	=29N	+41N	1.5	13.5	13.5	1.50	720	0.0
39	Ko, Youjun David	0	KOR	−7B	−26N	−24N	F	+36B	−27B	−37N	1.0	17.5	17.5	2.00	1262	0.0
40	FIDE 13230190	0	—	−22N	+36B	−25N	−27B	−24N	F	−26B	1.0	17.5	17.5	2.00	1241	0.0
41	FIDE 13238736	0	—	−23B	−31N	F	−28B	−17N	−35N	−38B	0.0	16.0	16.0	0.00	685	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Lee, YugeonKOR
+155.6
7.0 pts · #1
2Lee, EunhakKOR
+64.8
5.5 pts · #2
3Lee, RukKOR
+64.0
5.0 pts · #10

Top rating losers

1Gim, HajinKOR
-116.4
2.5 pts · #20
2Lee, HyeonjunKOR
-46.0
2.0 pts · #37
3Kim, GeonoKOR
-40.0
3.0 pts · #32

Biggest upsets

R1+294 Elo gap
Choi, Juneho1519 beat Gim, Hajin1813
R6+225 Elo gap
Lee, Ruk1588 beat Gim, Hajin1813
R5+212 Elo gap
Oh, Jaemin1601 beat Gim, Hajin1813