People · Republic of Korea
MoonSuk Chang (장문석)
3×3 · top 6.3% of 284,439 all-time · competing since May 2017 · 2017ZHAN89
MoonSuk Chang (장문석) has been competing for 9 years. His best event is the 3×3: a personal-best single of 9.56, set at Suncheon Fall 2023, puts him in the top 6.3% of the 284,439 people who have ever been ranked in the event, and 367th in Republic of Korea. Until November 2007, no official 3×3 solve in the world had been that fast. Across 13 competitions since May 2017, he has put 269 official solves on the record across nine events. Solve to solve, his 3×3 times vary about 17% around a typical one; 96% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 25.51 in May 2017 to 9.56, a 63% improvement. MoonSuk 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 | |
|---|---|---|---|---|---|
| 3×3 | 9.56 | 12.07 | top 6.3% | 367 / 4,352 | |
| Skewb | 3.61 | 6.99 | top 8.4% | 87 / 854 | |
| Pyraminx | 4.20 | 6.21 | top 8.7% | 250 / 1,271 | |
| 2×2 | 2.61 | 4.03 | top 10.0% | 291 / 2,319 | |
| 3×3 one-handed | 19.98 | 28.55 | top 20.4% | 283 / 966 | |
| 4×4 | 48.52 | 56.89 | top 22.8% | 411 / 1,308 | |
| Clock | 14.01 | 15.92 | top 43.8% | 301 / 536 | |
| Megaminx | 2:16.06 | — | early days — 2 solves | 332 / 524 | |
| 5×5 | 2:10.15 | 2:22.93 | top 55.5% | 451 / 716 |
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
- 15 Dec 2023Four personal bests in one day at Korean Championship 2023.
- 29 Oct 2023First sub-10 3×3: 9.56 at Suncheon Fall 2023.
- 2 Oct 2018Three personal bests in one day at China Championship 2018.
- 4 Nov 2017First sub-15 3×3: 14.68 at Nanjing Autumn 2017.
- 28 Jul 2017First sub-20 3×3: 17.85 at China Championship 2017.
- 28 Jul 2017Three personal bests in one day at China Championship 2017.
Competitions
- Burnaby Summer 2025 · 17 Aug 2025 — 1 personal best set
- Korean Championship 2023 · 15 Dec 2023 — 4 personal bests set
- Suncheon Fall 2023 · 29 Oct 2023 — 1 personal best set
- Ansan Autumn 2023 · 24 Sep 2023
- Rubik's WCA World Championship 2023 · 12 Aug 2023
- Seoul Spring 2023 · 7 May 2023
- Cubing SimCheong Open 2022 · 29 Oct 2022
- China Championship 2019 · 26 Jul 2019 — 2 personal bests set
- China Championship 2018 · 2 Oct 2018 — 3 personal bests set
- Nanjing Autumn 2017 · 4 Nov 2017 — 2 personal bests set
- Suzhou Open 2017 · 16 Sep 2017 — 2 personal bests set
- China Championship 2017 · 28 Jul 2017 — 3 personal bests set
- Shanghai Love In ECNU 2017 · 20 May 2017
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.
- DaYeong Kim (김다영) — met in 26 rounds, finished ahead 12 times
- Yi Wang (王旖) — met in 26 rounds, finished ahead twice
- MinGwan Yeo (여민관) — met in 24 rounds, finished ahead 8 times
Next targets
- A sub-8 3×3 single — 7,931 people have one; it is 1.56 away.
- A sub-3 Skewb single — 3,646 people have one; it is 0.61 away.
Targets move as he improves.