CChessStats

Via U1800 December

Open SwissStandard

23 players participated in this 6-round tournament, held from 13 Dec 2025 to 14 Dec 2025 in Seongnam, South Korea. 3 federations represented. Top 10 Elo average was 1669, and top seed was Eram Joo (🇰🇷 KOR, 1781).

Jun Heo (🇰🇷 KOR, 0) won with 5.0/6, ahead of Jiyu Hur (4.5) and Yisoo Shin (4.5). Heo took the lead from round 5.

The biggest upset came in round 1: Seojun B Lee (1505) beat Eram Joo (1781), a +276-point gap.

Location
🇰🇷Seongnam, South Korea
Dates
13 Dec 2025 → 14 Dec 2025
Time control
Standard: 30 minutes for game with 30 seconds increment from move 1
System
Swiss · 6 rounds
Top seed
🇰🇷Eram Joo1781
Avg top 10
1,669
Participants
23
Federations · 3 represented
🇰🇷South Korea×17
🇬🇺Guam×1
🇷🇺Russia×1
Top 3
  • 🥇
    Jun Heo
    🇰🇷KOR
    5.0pts·1723perf0.0
  • 🥈
    Jiyu Hur
    🇰🇷KOR·1750
    4.5pts·1783perf+9.2
  • 🥉
    Yisoo Shin
    🇰🇷KOR·1707
    4.5pts·1822perf+24.0

How it unfolded

Top 6 · 6 rounds

Jun Heo led from R5; +0.5-point edge over the runner-up. Title race converged from 4 co-leaders at R4 to 1 by R5.

Co-leaders
11
6
2
4
1
1
1.534.56R1R2R3R4R5R6
Heo5Hur4.5Shin4.5Lee4Jargalsaikhan3.5Shim3.5
R5–R6 · LEAD HELD

Jun Heo held the sole lead from R5 through R6 without losing it.

R6 · HEAD-TO-HEAD · WINNER VS 2ND

Jun Heo drew with Jiyu Hur (Black).

R1–R3 · WIN STREAK

Jiyu Hur won 3 in a row (R1–R3).

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Jun Heo*
½
½
1
2Jiyu Hur
½
*
½
½
3Yisoo Shin
½
½
*
½
4Seojun B Lee
0
½
½
*

Grille américaine

#PlayerEloFedR1R2R3R4R5R6PtsBu C1BuSBPerfΔ
1Heo, Jun0KOR+9N+20B=3B+16N+4B=2N5.018.019.014.5017230.0
2Hur, Jiyu1750KOR+11B+15N+6B=4N=3B=1B4.519.521.514.751783+9.2
3Shin, Yisoo1707KOR+23N+17B=1N+5B=2N=4B4.519.019.512.751822+24.0
4Lee, Seojun B1505KOR+22B+7N+16B=2B−1N=3N4.019.520.511.001956+113.2
5Michid Jargalsaikhan1726KOR+12B−6N+15B−3N=8B+9N3.517.019.09.251639-12.0
6Shim, Alina1516RUS+18N+5B−2NF+9B=7N3.516.016.09.751790+57.2
7Kim, Hajin A1619KOR+19N−4B−17N+13N+11B=6B3.514.515.57.751412-45.6
8Pak, Maksim1615KOR+21B−16N+12B−9B=5N+13N3.513.514.57.751554-12.4
9Kim, Ria1681KOR−1B+21N+11B+8N−6N−5B3.018.019.07.001572-20.7
10FIDE 132374970—FFF+23B+19N+15N3.03.53.53.5015700.0
11Kim, Rian1490KOR−2N+14B−9N+19B−7N=12B2.516.017.04.751297-24.8
12Kim, Geono1427KOR−5N+18B−8N+15N−13B=11N2.514.015.54.751494+11.2
13Park, Jihoo B0KOR−17N=23B+19N−7B+12N−8B2.512.513.03.7513540.0
14FIDE 132371280—−15B−11N−20N=18B+23N+19B2.58.08.52.256910.0
15Han, Seunghyeon1553KOR+14N−2B−5N−12B+18N−10B2.016.017.54.00833-47.2
16Jung, Jinuk1727KOR+20N+8B−4N−1BFF2.013.513.54.501657-4.8
17Kim, Junesun1531GUM+13B−3N+7BFFF2.010.510.56.001663+13.6
18FIDE 132319100—−6B−12N−21B=14N−15B+23B1.511.512.01.756960.0
19Jung, Sihwan0KOR−7B+22N−13B−11N−10B−14N1.014.015.01.0014870.0
20Jea, Daeul1482KOR−16B−1N+14BFFF1.09.59.52.50927-8.0
21Kim, Jessica Jiyeon0KOR−8N−9B+18NFFF1.08.08.01.508470.0
22Joo, Eram1781KOR−4N−19B+23NFFF1.05.55.50.50704-33.2
23FIDE 132368570—−3B=13N−22B−10N−14B−18N0.514.015.01.259430.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets