37th iChess Cup

Open SwissStandard

63 players participated in this 6-round tournament, held from 08 Mar 2026 to 15 Mar 2026 in Seoul, South Korea. 2 federations represented. Top 10 Elo average was 1662, and top seed was Hajoon Kim (🇰🇷 KOR, 1752).

Chanuk Choi (🇰🇷 KOR, 1706) won with 5.5/6, ahead of William Lincoln Paras (5.0) and Jaemin Bae (5.0). Choi won solo starting round 5.

The biggest upset came in round 5: Jungwoon Choi (1537) beat Juwon Son (1732), a +195-point gap.

Location

🇰🇷Seoul, South Korea

Dates

08 Mar 2026 → 15 Mar 2026

Time control

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

System

Swiss · 6 rounds

Top seed

🇰🇷Hajoon Kim1752

Avg top 10

1,662

Participants

Federations · 2 represented

🇰🇷South Korea×41

🇺🇸United States of America×1

Top 3

🥇
Chanuk Choi
🇰🇷KOR·1706
5.5pts·1993perf+60.0
🥈
William Lincoln Paras
🇺🇸USA
5.0pts·1691perf0.0
🥉
Jaemin Bae
🇰🇷KOR·1633
5.0pts·2271perf+34.4

How it unfolded

Top 6 · 6 rounds

Chanuk Choi led from R5; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R5.

Co-leaders

Choi5.5Paras5Bae5Kim5Oh5Kim4.5

R5–R6 · LEAD HELD

Chanuk Choi held the sole lead from R5 through R6 without losing it.

WIN STREAKS · 3 top finishers

Chanuk Choi 5 wins (R1–R5)William Lincoln Paras 3 wins (R1–R3)Jaemin Bae 3 wins (R4–R6)

Key matchups · top 4

Head-to-head between the four finishers

Player	1	2	3	4
1Chanuk Choi	*	—	—	1
2William Lincoln Paras	—	*	1	—
3Jaemin Bae	—	0	*	—
4Taeu Kim	0	—	—	*

Grille américaine

#	Player	Elo	Fed	R1	R2	R3	R4	R5	R6	Pts	Bu C1	Bu	SB	Perf	Δ
1	Choi, Chanuk	1706	KOR	+37B	+17N	+18B	+4N	+8N	=7B	5.5	20.5	23.0	20.75	1993	+60.0
2	Paras, William Lincoln	0	USA	+26N	+11B	+3N	=5B	=7N	+12B	5.0	22.5	25.5	20.75	1691	0.0
3	Bae, Jaemin	1633	KOR	+61B	+19N	−2B	+6N	+13B	+9N	5.0	21.0	21.5	16.50	2271	+34.4
4	Kim, Taeu	1633	KOR	+32N	+27B	+13N	−1B	+26N	+10B	5.0	19.5	22.5	17.00	1734	+21.2
5	Oh, Jaemin	1623	KOR	+57B	=6N	+35B	=2N	+29B	+8N	5.0	19.0	20.0	15.25	1867	+36.0
6	Park, Sihun	1432	KOR	+21N	=5B	+36N	−3B	+16N	+15B	4.5	20.5	23.0	15.50	1434	+0.4
7	Kim, Hajoon	1752	KOR	+42B	=46N	+15N	+16B	=2B	=1N	4.5	20.0	22.5	16.00	1606	-14.4
8	Kwon, Raein	1641	KOR	+59N	+23B	+10N	+28N	−1B	−5B	4.0	21.0	22.0	11.50	1682	+12.4
9	FIDE 13239660	0	—	+38N	−10B	+22N	+17B	+11N	−3B	4.0	20.0	22.5	13.50	1546	0.0
10	Choi, Jungwoon	1537	KOR	+47B	+9N	−8B	+25N	+28B	−4N	4.0	19.5	21.5	12.50	1602	+11.9
11	Li, Yunhan	1556	KOR	+50B	−2N	+42B	+27N	−9B	+19N	4.0	18.0	20.0	11.00	2239	+27.2
12	Kwak, Doyun	1596	KOR	+43B	+52N	−28B	+23N	+21B	−2N	4.0	17.5	19.0	11.00	1594	-0.4
13	Kim, Sunyong	1516	KOR	+40B	+56N	−4B	+37N	−3N	+48B	4.0	17.0	18.0	8.00	831	-27.2
14	Heo, Sol	1526	KOR	+53N	−15B	+38N	−29B	+37N	+27B	4.0	14.5	16.0	9.50	2209	+13.6
15	Seol, Youngjun	0	KOR	+?B	+14N	−7B	=19N	+20B	−6N	3.5	20.0	20.0	9.25	1533	0.0
16	Lee, Minjun A	0	KOR	=20B	+22N	+55B	−7N	−6B	+35N	3.5	18.5	20.0	9.25	1593	0.0
17	Cho, Jungbin	1463	KOR	+51B	−1B	+31N	−9N	+39B	=21N	3.5	18.5	20.0	8.75	904	-8.0
18	Kim, Yeonseo	1587	KOR	+44N	+29B	−1N	−26B	+30B	=25N	3.5	18.0	20.5	10.25	1362	-29.6
19	Kim, Moonso	1458	KOR	+45N	−3B	+51N	=15B	+36N	−11B	3.5	17.5	19.0	8.25	794	-13.2
20	Yun, Yejoon	1478	KOR	=16N	−36B	+33N	+24B	−15N	+38B	3.5	16.0	18.5	10.75	2221	+16.8
21	FIDE 13240161	0	—	−6B	+57N	+52B	+35N	−12N	=17B	3.5	16.0	17.0	6.75	1463	0.0
22	Lim, Hyeonwoo	1540	KOR	=33N	−16B	−9B	+?N	+44B	+29N	3.5	16.0	16.0	7.00	1479	0.0
23	Kim, Jio	1457	KOR	+41B	−8N	+39B	−12B	=40N	+36B	3.5	15.5	18.0	8.75	818	-22.8
24	An, Seunggi	1423	KOR	=35B	=25N	=30B	−20N	+41B	+40N	3.5	15.0	17.5	9.50	1406	-4.0
25	Kim, Hyunwoo B	1408	KOR	=36N	=24B	+60N	−10B	+56N	=18B	3.5	14.5	15.5	6.75	1412	+0.4
26	Kim, Sihoo A	1443	KOR	−2B	+47N	+41B	+18N	−4B	F	3.0	19.0	21.0	8.00	1643	0.0
27	Shin, Seojun A	1412	KOR	+39B	−4N	+56B	−11B	+31N	−14N	3.0	18.5	19.5	6.50	771	-34.4
28	Son, Juwon	1732	KOR	+34N	+58B	+12N	−8B	−10N	F	3.0	18.0	19.0	8.00	1565	-34.4
29	Baik, Hoon	0	KOR	+?B	−18N	+?B	+14N	−5N	−22B	3.0	16.0	16.0	4.00	1556	0.0
30	Suh, Hannah	0	KOR	−54N	+44B	=24N	+45B	−18N	=33B	3.0	15.0	16.5	8.25	1220	0.0
31	Lee, Kiwon	0	KOR	−58N	+34B	−17B	+43N	−27B	+?N	3.0	13.0	13.0	5.50	1252	0.0
32	FIDE 13240110	0	—	−4B	−41N	+47B	−39N	+?B	+56N	3.0	13.0	13.0	3.00	831	0.0
33	Kim, Howon	0	KOR	=22B	−35N	−20B	+?N	+?B	=30N	3.0	12.5	12.5	3.25	1423	0.0
34	FIDE 13240080	0	—	−28B	−31N	−43B	+?N	+?B	+?N	3.0	8.5	8.5	0.00	932	0.0
35	Park, Joonwoo	1710	KOR	=24N	+33B	−5N	−21B	+51N	−16B	2.5	18.5	20.0	6.25	1329	-38.4
36	Son, Dojun	0	KOR	=25B	+20N	−6B	+?N	−19B	−23N	2.5	18.5	18.5	5.25	1392	0.0
37	FIDE 13240005	0	—	−1N	+48B	+58N	−13B	−14B	=39N	2.5	18.0	19.0	4.25	1365	0.0
38	Choi, Hael	0	KOR	−9B	+40N	−14B	=41N	+45B	−20N	2.5	16.5	19.0	6.25	702	0.0
39	Seol, Yunseo	0	KOR	−27N	+49B	−23N	+32B	−17N	=37B	2.5	15.5	17.5	6.25	642	0.0
40	Lee, Chaewon	0	KOR	−13N	−38B	+49N	+52N	=23B	−24B	2.5	15.5	17.0	5.25	1190	0.0
41	FIDE 13240048	0	—	−23N	+32B	−26N	=38B	−24N	+?B	2.5	15.5	15.5	4.25	638	0.0
42	FIDE 13240099	0	—	−7N	+53B	−11N	−48B	=?N	+51B	2.5	13.5	13.5	3.00	853	0.0
43	FIDE 13236148	0	—	−12N	−60B	+34N	−31B	=53N	+?B	2.5	12.5	12.5	3.75	796	0.0
44	FIDE 13237250	0	—	−18B	−30N	+59N	=51B	−22N	+?B	2.5	12.5	12.5	1.75	854	0.0
45	Lee, Yena	0	KOR	−19B	+61N	=?B	−30N	−38N	+52B	2.5	11.0	11.0	2.00	1270	0.0
46	Oshiro, Souta	1509	KOR	+48N	=7B	+54N	F	F	F	2.5	8.0	8.0	5.75	1770	+26.4
47	Kim, Rayon	0	KOR	−10N	−26B	−32N	+?B	−49N	+?B	2.0	12.0	12.0	0.00	1497	0.0
48	Lee, Dogeon	0	KOR	−46B	−37N	F	+42N	+?B	−13N	2.0	11.5	11.5	2.50	1356	0.0
49	FIDE 13237381	0	—	−55B	−39N	−40B	=?N	+47B	=50N	2.0	10.5	10.5	3.00	793	0.0
50	FIDE 13238647	0	—	−11N	−?N	+61B	−56B	=52N	=49B	2.0	9.0	9.0	2.25	707	0.0
51	FIDE 13240102	0	—	−17N	+59B	−19B	=44N	−35B	−42N	1.5	14.5	15.5	2.25	747	0.0
52	FIDE 13237322	0	—	+60N	−12B	−21N	−40B	=50B	−45N	1.5	14.5	15.5	2.00	796	0.0
53	FIDE 13240056	0	—	−14B	−42N	+57B	−?N	=43B	−?N	1.5	10.0	10.0	2.25	668	0.0
54	Jang, Minwook	1405	KOR	+30B	=55N	−46B	F	F	F	1.5	7.0	7.0	3.75	1357	-4.4
55	Chung, Jaeheon	1598	KOR	+49N	=54B	−16N	F	F	F	1.5	7.0	7.0	2.75	1404	-5.0
56	FIDE 13240013	0	—	F	−13B	−27N	+50N	−25B	−32B	1.0	15.5	15.5	2.00	643	0.0
57	FIDE 13240145	0	—	−5N	−21B	−53N	−?B	−?N	+?B	1.0	10.0	10.0	0.00	822	0.0
58	Cho, Ilwoong	1488	KOR	+31B	−28N	−37B	F	F	F	1.0	8.5	8.5	3.00	932	-8.0
59	FIDE 13234978	0	—	−8B	−51N	−44B	−?N	+?B	−?N	1.0	8.0	8.0	0.00	840	0.0
60	FIDE 13239295	0	—	−52B	+43N	−25B	F	F	F	1.0	7.5	7.5	2.50	605	0.0
61	FIDE 13240072	0	—	−3N	−45B	−50N	−?B	−?B	=?N	0.5	9.5	9.5	0.00	831	0.0
62	FIDE 13240170	0	—	F	F	F	−?N	−?B	−?N	0.0	0.0	0.0	0.00	659	0.0
63	FIDE 13240153	0	—	F	−?N	F	F	F	F	0.0	0.0	0.0	0.00	621	0.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers

1Choi, ChanukKOR
+60.0
5.5 pts · #1
2Oh, JaeminKOR
+36.0
5.0 pts · #9
3Bae, JaeminKOR
+34.4
5.0 pts · #4

Top rating losers

1Park, JoonwooKOR
-38.4
2.5 pts · #31
2Son, JuwonKOR
-34.4
3.0 pts · #12
3Shin, Seojun AKOR
-34.4
3.0 pts · #44

Biggest upsets

R5+195 Elo gap
Choi, Jungwoon1537 beat Son, Juwon1732
R4+144 Elo gap
Kim, Sihoo A1443 beat Kim, Yeonseo1587