People · Republic of Korea
Duck-Hwan Kim (김덕환)
Pyraminx · top 39.6% of 130,891 all-time · competing since March 2025 · 2025KIMD06
Duck-Hwan Kim (김덕환) has been competing for a year. His best event is the Pyraminx: a personal-best single of 8.39, set at Suwon Summer 2025, puts him in the top 39.6% of the 130,891 people who have ever been ranked in the event, and 601st in Republic of Korea. Across 13 competitions since March 2025, he has put 152 official solves on the record across six events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 54% of the 36,406 competitors with ten or more counted rounds. His 3×3 best has come down from 40.25 in March 2025 to 27.54, a 32% improvement. He has entered 13 competitions, more competitions than 94% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Republic of Korea | |
|---|---|---|---|---|---|
| Pyraminx | 8.39 | 10.67 | top 39.6% | 601 / 1,294 | |
| 2×2 | 6.13 | 8.35 | top 52.3% | 1,492 / 2,334 | |
| 3×3 | 27.54 | 33.80 | top 58.0% | 2,913 / 4,390 | |
| Skewb | 12.70 | 18.82 | top 69.4% | 649 / 874 | |
| Clock | 30.57 | — | early days — 3 solves | 494 / 541 | |
| Square-1 | 1:40.74 | — | early days — 2 solves | 380 / 383 |
Percentile against all competitors ever ranked in each event, a fairer measure than raw rank, because the pools differ by a factor of ten.
The line so far
Best single per competition, 3×3. Faster is higher — the axis is the right way up.
The story so far
- 22 Mar 2026First sub-30 3×3: 27.54 at Seoul Spring 2026.
- 8 Mar 2025First competition: Korea Newcomers AM 2025. A 40.25 3×3 single to start from.
Competitions
- Okay Okcheon 2026 · 17 Oct 2026
- Ansan Autumn 2026 · 19 Sep 2026 — 1 personal best set
- Korea Open 2026 · 15 Aug 2026 — 1 personal best set
- Seoul Summer 2026 · 19 Jul 2026 — 1 personal best set
- Uhseo Osong 2026 · 13 Jun 2026 — 2 personal bests set
- Seoul Spring 2026 · 22 Mar 2026 — 1 personal best set
- Cube Camp in Jeju 2026 · 21 Feb 2026
- Okcheon Autumn Breeze 2025 · 18 Oct 2025 — 1 personal best set
- Korea Open 2025 · 15 Aug 2025
- Suwon Summer 2025 · 13 Jul 2025 — 1 personal best set
- Osan Summer 2025 · 29 Jun 2025 — 1 personal best set
- Daejeon Spring 2025 · 25 May 2025
- Korea Newcomers AM 2025 · 8 Mar 2025
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 DNF (did not finish) is an attempt with no valid result: a popped piece, an unsolved face, an over-limit memorisation · top X% compares against everyone ever ranked in that event, which is fairer than raw rank because event pools differ tenfold.
The circuit
The people whose scorecards keep turning up next to his.
- Hyunjo Kim (김현조) — met in 33 rounds, finished ahead 9 times
- Ko Youngjin (고영진) — met in 33 rounds, never finished ahead
- A-Jung Kim (김아정) — met in 31 rounds, finished ahead 4 times
Next targets
- A sub-8 Pyraminx single — 47,369 people have one; it is 0.39 away.
- A sub-6 2×2 single — 96,384 people have one; it is 0.13 away.
Targets move as he improves.