2025 Korea Youth Selection U10

Open SwissStandard

59 players participated in this 7-round tournament, held from 13 Jun 2025 to 16 Jun 2025 in Gwacheon, South Korea. Top 10 Elo average was 1703, and top seed was Kaviinayan Meiyazhagan (🇰🇷 KOR, 1900).

David J Lee (🇰🇷 KOR, 1610) won with 6.0/7, ahead of Jeongmin Oh (6.0) and Kaviinayan Meiyazhagan (5.5). Lee shared the lead from round 3, winning on tie-break.

The biggest upset came in round 5: Joowon Bae (1505) beat Yunwoo Sim (1720), a +215-point gap.

Location

🇰🇷Gwacheon, South Korea

Dates

13 Jun 2025 → 16 Jun 2025

Time control

Standard: 90 minutes with 30 second increment from move 1

System

Swiss · 7 rounds

Top seed

🇰🇷Kaviinayan Meiyazhagan1900

Avg top 10

1,703

Participants

Federations · 1 represented

🇰🇷South Korea×54

Top 3

🥇
David J Lee
🇰🇷KOR·1610
6.0pts·1859perf+77.6
🥈
Jeongmin Oh
🇰🇷KOR·1565
6.0pts·1920perf+103.2
🥉
Kaviinayan Meiyazhagan
🇰🇷KOR·1900
5.5pts·1804perf-19.8

How it unfolded

Top 6 · 7 rounds

Tight race until R7; 2 players tied at 6.0/7, decided on Buchholz. Title race narrowed from 7 co-leaders at R4 to 2 at the finish.

Co-leaders

Lee6Oh6Meiyazhagan5.5Kwak5.5Li5Hur5

R7 · TIEBREAK CLUSTER

2 players finish on 6.0/7. Lee takes the title on Buchholz Cut1 (26.5).

WIN STREAKS · 3 top finishers

David J Lee 3 wins (R1–R3)Jeongmin Oh 5 wins (R3–R7)Kaviinayan Meiyazhagan 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1David J Lee	*	—	—	½
2Jeongmin Oh	—	*	0	—
3Kaviinayan Meiyazhagan	—	1	*	½
4Joohwan Kwak	½	—	½	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	R7	Pts	Bu C1	Bu	SB	Perf	Δ
1	Lee, David J	1610	KOR	+47B	+44N	+17B	=10N	+6B	=4N	+7B	6.0	26.5	29.0	24.00	1859	+77.6
2	Oh, Jeongmin	1565	KOR	+36N	−3B	+29N	+28B	+5N	+20N	+10B	6.0	26.0	29.0	23.50	1920	+103.2
3	Meiyazhagan, Kaviinayan	1900	KOR	+8B	+2N	+18B	=6N	+11B	=7N	=4B	5.5	31.0	35.0	27.25	1804	-19.8
4	Kwak, Joohwan	1590	KOR	+24B	+41N	=16B	+9N	+13B	=1B	=3N	5.5	29.0	32.0	24.25	1873	+83.6
5	Li, Artem Serg	1768	KOR	+50B	−18N	+12B	+22N	−2B	+26N	+11B	5.0	27.0	29.0	19.00	1684	-25.6
6	Lee, Jinwoo	1610	KOR	+40N	+55B	+28N	=3B	−1N	=8B	+19N	5.0	27.0	28.0	16.75	1717	+31.6
7	Hur, Jiyu	1591	KOR	+46N	=42B	+27N	+16N	+10B	=3B	−1N	5.0	26.0	28.5	18.50	1822	+73.6
8	Bae, Joowon	1505	KOR	−3N	+36B	+55N	=19B	+16B	=6N	+20B	5.0	25.5	26.5	16.50	1745	+60.8
9	Feigin, Benjamin	1788	KOR	=27N	+43B	+42N	−4B	=30N	+15N	+18B	5.0	23.5	26.0	17.00	1670	-31.2
10	Lee, Jeongwoo B	1638	KOR	+31N	+34B	+20N	=1B	−7N	+14B	−2N	4.5	29.0	32.5	18.50	1656	+8.8
11	Lee, Eunhak	1597	KOR	=12B	+39N	+30B	+14N	−3N	+21B	−5N	4.5	27.0	30.0	17.25	1716	+38.8
12	Choi, Juneho	1442	KOR	=11N	+35B	−5N	+33B	=19N	+30B	=16N	4.5	24.5	28.0	16.75	1679	+71.6
13	Lee, Kwanhoo	1659	KOR	+29N	−28B	+50N	+23B	−4N	=17B	+27B	4.5	24.0	26.0	15.00	1614	-14.4
14	Lee, Suhyuk	1587	KOR	=43N	+48B	+21N	−11B	+45N	−10N	+32B	4.5	21.5	24.0	13.75	1619	+12.0
15	Youn, Laeho	1577	KOR	−55N	+40B	=38N	+43B	+42N	−9B	+29N	4.5	19.5	20.5	13.00	1683	+26.8
16	Sim, Yunwoo	1720	KOR	+38N	+23B	=4N	−7B	−8N	+28B	=12B	4.0	27.5	30.5	15.50	1577	-50.0
17	Lee, Jepil	1511	KOR	+52B	+33B	−1N	+18N	−20B	=13N	=23B	4.0	26.0	28.0	13.75	1517	+12.4
18	Kim, Geonmin	1556	KOR	+57N	+5B	−3N	−17B	+34N	+37B	−9N	4.0	26.0	27.0	12.50	1615	+8.8
19	Kim, Jihun	1561	KOR	−37B	+49N	+32B	=8N	=12B	+22N	−6B	4.0	25.0	27.5	14.75	1584	+8.0
20	Seol, Youngjun	1578	KOR	+49B	+37N	−10B	+44N	+17N	−2B	−8N	4.0	25.0	27.5	12.00	1464	-31.2
21	Yoo, Hanjoon	1699	KOR	+45B	=30N	−14B	+34B	+27N	−11N	=25B	4.0	23.5	26.0	13.25	1583	-39.6
22	Jang, Minki	1527	KOR	−42N	+46B	+31N	−5B	+36N	−19B	+40N	4.0	21.0	23.5	12.00	1604	+23.2
23	Bae, Jaemin	1550	KOR	+59B	−16N	+47B	−13N	=29B	+45B	=17N	4.0	21.0	21.0	8.75	1538	-1.6
24	Shin, Seojun	1412	KOR	−4N	+51B	−44B	−29N	+47B	+50B	+38N	4.0	19.0	21.0	9.50	1555	+57.6
25	Park, Junhoo	1534	KOR	=48N	−27B	−43N	+57N	+39B	+42B	=21N	4.0	18.0	19.0	9.75	1287	-36.4
26	Lee, Ruk	1510	KOR	F	F	+58N	+46B	+31N	−5B	+36N	4.0	14.0	14.0	9.00	1676	+25.2
27	Lee, Seunghyun A	1491	KOR	=9B	+25N	−7B	+39N	−21B	+33B	−13N	3.5	26.0	29.0	13.00	1503	+0.4
28	Seo, Pureum	1531	KOR	+53B	+13N	−6B	−2N	=32B	−16N	+37B	3.5	26.0	28.0	11.25	1458	-19.6
29	Kim, Geono	1465	KOR	−13B	+53N	−2B	+24B	=23N	+44N	−15B	3.5	25.5	27.5	10.50	1486	+5.6
30	Oh, Jaemin	1544	KOR	+58N	=21B	−11N	+38B	=9B	−12N	=31N	3.5	24.5	24.5	9.25	1520	-10.8
31	Chang, Caden	1458	KOR	−10B	+56N	−22B	+41N	−26B	+48N	=30B	3.5	21.5	22.5	8.25	1229	-40.0
32	Kim, Siwon	1460	KOR	−33N	+52B	−19N	+55B	=28N	+35B	−14N	3.5	21.0	22.0	8.25	1467	-3.2
33	Kim, Rian	1642	KOR	+32B	−17N	=45B	−12N	+49B	−27N	+46B	3.5	20.5	23.0	9.75	1407	0.0
34	Lee, Joohan	1506	KOR	+56B	−10N	+41B	−21N	−18B	=46N	+45B	3.5	20.5	21.5	7.75	1409	-26.0
35	Park, Sihun	1544	KOR	=39B	−12N	+37B	−45N	+43B	−32N	+42B	3.5	19.0	21.5	9.50	1281	-55.2
36	Kim, Jiho A	0	KOR	−2B	−8N	+56B	+47N	−22B	+43N	−26B	3.0	24.0	25.0	6.00	1379	0.0
37	Kim, Siho	0	KOR	+19N	−20B	−35N	+40B	+44B	−18N	−28N	3.0	22.0	24.5	9.50	1483	0.0
38	Kim, Seungwon	1479	KOR	−16B	+59N	=15B	−30N	=48B	+49N	−24B	3.0	21.0	21.0	6.00	1241	-42.8
39	Lee, Hanjo	0	KOR	=35N	−11B	+48N	−27B	−25N	=47B	+51N	3.0	20.5	22.5	7.50	1403	0.0
40	Son, Haseong	1452	KOR	−6B	−15N	+59B	−37N	+53B	+54N	−22B	3.0	20.0	20.0	3.50	769	-41.2
41	Joi, Woojoo	0	KOR	+51N	−4B	−34N	−31B	−50N	+58B	+56N	3.0	17.5	17.5	3.00	1282	0.0
42	Song, Yoojun	0	KOR	+22B	=7N	−9B	+51N	−15B	−25N	−35N	2.5	26.0	28.0	8.50	1484	0.0
43	Lee, Donghwa	1409	KOR	=14B	−9N	+25B	−15N	−35N	−36B	+55N	2.5	24.5	25.5	7.25	1457	-10.8
44	Lee, Junmyeong	1507	KOR	+54N	−1B	+24N	−20B	−37N	−29B	=48N	2.5	23.0	24.5	6.75	1320	-38.4
45	Lee, Jeongjun B	1475	KOR	−21N	+58B	=33N	+35B	−14B	−23N	−34N	2.5	23.0	23.0	5.25	1334	-34.0
46	Kim, Shihwan	1418	KOR	−7B	−22N	+53B	−26N	+52B	=34B	−33N	2.5	22.0	24.0	5.75	1206	-36.4
47	Kim, Sihoo A	1457	KOR	−1N	+54B	−23N	−36B	−24N	=39N	+52B	2.5	22.0	23.5	5.00	718	-47.6
48	Lee, Seohan	0	KOR	=25B	−14N	−39B	+59N	=38N	−31B	=44B	2.5	20.5	20.5	4.75	1364	0.0
49	Hwang, Siwoo	0	KOR	−20N	−19B	+52N	+50B	−33N	−38B	=54B	2.5	18.5	20.0	4.75	1331	0.0
50	Kyeong, Soohyun	1484	KOR	−5N	+57B	−13B	−49N	+41B	−24N	F	2.0	20.0	20.0	4.00	814	-41.2
51	Lee, Junwoo A	1568	KOR	−41B	−24N	+57B	−42B	−54N	+53N	−39B	2.0	16.0	17.0	3.00	606	-28.4
52	FIDE 13230506	0	—	−17N	−32N	−49B	+58B	−46N	+55B	−47N	2.0	16.0	16.0	1.00	652	0.0
53	Lee, Taeoh	0	KOR	−28N	−29B	−46N	+56B	−40N	−51B	+58N	2.0	15.5	15.5	1.00	685	0.0
54	Yeo, Seungjun	0	KOR	−44B	−47N	F	F	+51B	−40B	=49N	1.5	12.5	12.5	3.25	1297	0.0
55	Jang, Seyong	0	KOR	+15B	−6N	−8B	−32N	−57B	−52N	−43B	1.0	22.5	23.5	4.50	1293	0.0
56	FIDE 13233980	0	—	−34N	−31B	−36N	−53N	F	+57B	−41B	1.0	16.0	16.0	1.00	682	0.0
57	FIDE 13231456	0	—	−18B	−50N	−51N	−25B	+55N	−56N	F	1.0	14.0	14.0	1.00	736	0.0
58	FIDE 13232908	0	—	−30B	−45N	−26B	−52N	F	−41N	−53B	0.0	17.0	17.0	0.00	709	0.0
59	FIDE 13225863	0	—	−23N	−38B	−40N	−48B	F	F	F	0.0	13.5	13.5	0.00	691	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Oh, JeongminKOR
+103.2
6.0 pts · #4
2Kwak, JoohwanKOR
+83.6
5.5 pts · #8
3Lee, David JKOR
+77.6
6.0 pts · #1

Top rating losers

1Park, SihunKOR
-55.2
3.5 pts · #39
2Sim, YunwooKOR
-50.0
4.0 pts · #9
3Kim, Sihoo AKOR
-47.6
2.5 pts · #54

Biggest upsets

R5+215 Elo gap
Bae, Joowon1505 beat Sim, Yunwoo1720
R2+212 Elo gap
Kim, Geonmin1556 beat Li, Artem Serg1768
R5+203 Elo gap
Oh, Jeongmin1565 beat Li, Artem Serg1768