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
Federations · 2 represented
🇰🇷South Korea×38
🇺🇸United States of America×1
Top 3
- 🥇
- 🥈
- 🥉
How it unfolded
Top 6 · 6 roundsChanuk 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
27
11
5
2
1
1
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 | FIDE 13240137 | 0 | — | −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 | FIDE 13239171 | 0 | — | −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 | FIDE 13240021 | 0 | — | −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+60.05.5 pts · #1
- 2Oh, JaeminKOR+36.05.0 pts · #9
- 3Bae, JaeminKOR+34.45.0 pts · #4
Top rating losers
- 1Park, JoonwooKOR-38.42.5 pts · #31
- 2Son, JuwonKOR-34.43.0 pts · #12
- 3Shin, Seojun AKOR-34.43.0 pts · #44
Biggest upsets
- R5+195 Elo gap
- R4+144 Elo gap