10th Gimpo Chess Open

Open SwissStandard

27 players participated in this 4-round tournament, held on 01 Feb 2026 in Gimpo, South Korea. 2 federations represented. Top 10 Elo average was 1589, and top seed was Joowon Lee (🇰🇷 KOR, 1648).

Seongu Jeon (🇰🇷 KOR, 1643) won with 3.5/4, ahead of Joowon Lee (3.5) and Hyoungbeen Bae (3.5). Jeon shared the lead from round 1, winning on tie-break.

Location

🇰🇷Gimpo, South Korea

Dates

01 Feb 2026

Time control

Standard: 60 minutes for game

System

Swiss · 4 rounds

Top seed

🇰🇷Joowon Lee1648

Avg top 10

1,589

Participants

Federations · 2 represented

🇰🇷South Korea×19

🇬🇺Guam×1

Top 3

🥇
Seongu Jeon
🇰🇷KOR·1643
3.5pts·1837perf+10.0
🥈
Joowon Lee
🇰🇷KOR·1648
3.5pts·1836perf+26.8
🥉
Hyoungbeen Bae
🇰🇷KOR·1635
3.5pts·1824perf+11.6

How it unfolded

Top 6 · 4 rounds

Tight race until R4; 3 players tied at 3.5/4, decided on Buchholz. Title race narrowed from 3 co-leaders at R4 to 3 at the finish.

Co-leaders

Lee3.5Bae3.5Jeon3.5Collins3Suk3Kim3

R4 · TIEBREAK CLUSTER

3 players finish on 3.5/4. Jeon takes the title on Buchholz Cut1 (9.5).

WIN STREAKS · 3 top finishers

Joowon Lee 3 wins (R1–R3)Hyoungbeen Bae 3 wins (R1–R3)Seongu Jeon 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Joowon Lee	*	—	½	1
2Hyoungbeen Bae	—	*	—	—
3Seongu Jeon	½	—	*	—
4Thomas Mathew Collins	0	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	Pts	Bu C1	Bu	SB	Perf	Δ
1	Jeon, Seongu	1643	KOR	+12N	+5B	+9N	=2B	3.5	9.5	11.5	9.75	1837	+10.0
2	Lee, Joowon	1648	KOR	+26B	+16N	+6B	=1N	3.5	8.5	9.0	7.25	1836	+26.8
3	Bae, Hyoungbeen	1635	KOR	+17B	+11N	+7B	=4N	3.5	8.0	10.0	8.50	1824	+11.6
4	Yun, ChanKyu	1561	KOR	+22B	+10N	=13B	=3B	3.0	8.0	9.0	6.25	1612	+5.6
5	Kim, Junesun	1542	GUM	+21B	−1N	+17B	+16N	3.0	7.5	9.0	5.50	1531	-10.8
6	Collins, Thomas Mathew	1627	KOR	+27N	+14B	−2N	+15B	3.0	7.5	7.5	4.00	1633	+1.6
7	Choi, Jeonghyun	1600	KOR	+24N	+23B	−3N	+12B	3.0	6.5	7.5	4.00	857	-8.6
8	Kim, Keonwoo	1615	KOR	−11B	+22N	+18N	+14B	3.0	6.0	7.0	5.00	1465	-10.8
9	Suk, Taeha	0	KOR	+?B	+?N	−1B	+13N	3.0	5.5	5.5	2.00	1599	0.0
10	FIDE 13233742	0	—	+15N	−4B	+23N	=18B	2.5	7.0	8.0	4.00	1497	0.0
11	Kim, Rian	0	KOR	+8N	−3B	−14N	+25B	2.0	8.5	9.5	4.00	1429	-10.0
12	Kang, Jiann	0	KOR	−1B	+20N	+?B	−7N	2.0	8.5	8.5	2.00	823	0.0
13	Yang, Hayoon	1555	KOR	+19N	=18B	=4N	−9B	2.0	8.0	10.0	4.50	1561	-0.4
14	Seo, Yerin	1460	KOR	+20B	−6N	+11B	−8N	2.0	8.0	10.0	4.00	1435	-0.8
15	Hwang, Yoonho Jason	1415	KOR	−10B	+21N	+19B	−6N	2.0	7.5	9.0	3.50	829	-10.0
16	Yang, Heewook	1432	KOR	+25N	−2B	+24N	−5B	2.0	7.5	8.5	2.00	844	-17.2
17	FIDE 13235214	0	—	−3N	+25B	−5N	+22B	2.0	7.5	8.5	2.00	848	0.0
18	Lee, Yuseong	0	KOR	+?B	=13N	−8B	=10N	2.0	7.5	7.5	2.25	1553	0.0
19	Lee, Junseo A	0	KOR	−13B	+26N	−15N	+23B	2.0	5.0	5.5	1.50	700	0.0
20	FIDE 13238230	0	—	−14N	−12B	+27N	+24B	2.0	5.0	5.0	1.00	641	0.0
21	FIDE 13226517	0	—	−5N	−15B	=?B	+?N	1.5	5.0	5.0	0.00	736	0.0
22	Kim, Yejun A	0	KOR	−4N	−8B	+?B	−17N	1.0	8.0	8.0	0.00	1426	0.0
23	FIDE 13235702	0	—	+?B	−7N	−10B	−19N	1.0	7.5	7.5	0.00	804	0.0
24	FIDE 13239228	0	—	−7B	+?N	−16B	−20N	1.0	7.0	7.0	0.00	712	0.0
25	Park, Jihoo B	0	KOR	−16B	−17N	+26B	−11N	1.0	6.0	6.5	0.50	654	0.0
26	Jung, Seonghyun	0	KOR	−2N	−19B	−25N	=?N	0.5	6.5	6.5	0.00	850	0.0
27	FIDE 13239147	0	—	−6B	−?N	−20B	−?N	0.0	5.0	5.0	0.00	779	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Lee, JoowonKOR
+26.8
3.5 pts · #1
2Bae, HyoungbeenKOR
+11.6
3.5 pts · #2
3Jeon, SeonguKOR
+10.0
3.5 pts · #5

Top rating losers

1Yang, HeewookKOR
-17.2
2.0 pts · #19
2Kim, KeonwooKOR
-10.8
3.0 pts · #7
3Kim, JunesunGUM
-10.8
3.0 pts · #13