Competitions · Republic of Korea

Uhseo Osong 2025

충청북도 청주시 (Cheongju-si, Chungcheongbuk-do) · 15 November 2025 · 5 events · 136 competitors · 133 personal bests

Seung Hyuk Nahm (남승혁) won two of the five events (3×3, 4×4) and the closest final was the 2×2, won by Kyeongmin Choi (최경민) by 0.31 seconds. 136 competitors produced 133 personal bests, 70 of which still stand today, and 22 people held a competitor card for the first time.

The moment

A national record

Yeon Kyun Park (박연균) set the 3×3 blindfolded average national record: 23.06.

Two wins

Seung Hyuk Nahm (남승혁) — 3×3, 4×4

0.31s

closest final — 2×2, Kyeongmin Choi (최경민) over Seung Hyuk Nahm (남승혁)

133

personal bests set on the day

Winners & podiums

Event	Winner	Single	Average
3×3	Seung Hyuk Nahm (남승혁)	6.15	6.55
2×2	Kyeongmin Choi (최경민)	1.17	1.46
4×4	Seung Hyuk Nahm (남승혁)	20.22	23.80
3×3 blindfolded	Jeff Park	16.69	—
3×3 one-handed	Yoochan Hong (홍유찬)	7.62	9.13

The PB harvest

133 set · 70 still standing

Eunho Hwang (황은호) — 3×3 single 6.82: into the top 1.1% of the event's history.
Yugon Kim — 3×3 single 7.34: into the top 1.8% of the event's history.
Minseo Gu (구민서) — 3×3 one-handed single 11.12: into the top 2.0% of the event's history.
SeungWoon Lee (이승운) — 3×3 single 7.80: into the top 2.4% of the event's history.
SeungWoon Lee (이승운) — 3×3 one-handed single 11.79: into the top 2.7% of the event's history.
DongGeon Kim (김동건) — 3×3 single 8.16: into the top 3.1% of the event's history.
Sim Jae Yoon — 3×3 single 8.66: into the top 4.1% of the event's history.
Eunho Hwang (황은호) — 2×2 single 1.93: into the top 4.3% of the event's history.

First-timers

22 people competed for the first time at this competition, joining the 28,483 people who made their debut in 2025. Start here explains what a first competition is like.

Records watch

1 regional record was set at this competition.

The field

136 competitors · 516 results · 5 events.

Solve this final yourself

how this works →

The 3×3 final here ran on one scramble group, so these five sequences are exactly what the finalists faced. Seung Hyuk Nahm (남승혁) won it with a 6.55 average. Hold your cube white centre up, green centre facing you, follow each sequence, and check against the pictures.

1L2 R2 F D2 U2 B U2 D' L2 R B2 L U' L F D2 U' L'
2L F2 B L F' L' B2 U' L B' D F2 R2 U2 D2 F2 R L
3U2 F' R2 F2 D' F L' D2 R' B2 L2 D F2 D' F2 L2 F U2
4L U2 B2 F' D2 B2 L2 U2 L' B' L2 U2 L2 U R' D' L F2
5R F2 U2 F2 D2 F L2 U2 R2 U' F L' R2 D' F' D2 U' R2 D

solve 1

solve 2

solve 3

solve 4

solve 5

Race this final

Everyone who competed

136 competitors

Reading this page: a single is one solve's time · an average is the middle three of five solves, best and worst discarded · a PB is a personal best · a final is a competition's last round; its order decides the podium · a DNF (did not finish) is an attempt with no valid result: a popped piece, an unsolved face, an over-limit memorisation · every solve starts from a computer-generated scramble, the same for every competitor in a round.