People · Australia
Josephine Siburian
Megaminx · top 1.1% of 34,786 all-time · competing since August 2020 · 2020SIBU02
Josephine Siburian has been competing for 6 years. Her best event is the Megaminx: a personal-best single of 37.53, set at Rubik's WCA Oceanic Championship 2024, puts her in the top 1.1% of the 34,786 people who have ever been ranked in the event, and 13th in Australia. Until May 2016, no official Megaminx solve in the world had been that fast. Across 15 competitions since August 2020, she has put 662 official solves on the record across eleven events. Solve to solve, her 3×3 times vary about 14% around a typical one; 66% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. Her 3×3 best has come down from 20.11 in August 2020 to 7.20, a 64% improvement. Josephine has entered 15 competitions, more competitions than 95% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Australia | |
|---|---|---|---|---|---|
| Megaminx | 37.53 | 43.06 | top 1.1% | 13 / 1,277 | |
| 3×3 | 7.20 | 9.38 | top 1.6% | 174 / 11,709 | |
| 5×5 | 56.43 | 58.90 | top 3.9% | 58 / 1,356 | |
| Square-1 | 8.92 | 11.27 | top 4.4% | 45 / 899 | |
| Skewb | 3.58 | 6.00 | top 8.2% | 223 / 3,534 | |
| 2×2 | 2.56 | 3.65 | top 9.5% | 720 / 8,567 | |
| 4×4 | 38.00 | 43.74 | top 9.8% | 258 / 3,051 | |
| 6×6 | 1:57.48 | 1:58.87 | top 10.0% | 57 / 641 | |
| Pyraminx | 4.52 | 7.05 | top 10.3% | 474 / 5,993 | |
| 3×3 one-handed | 21.45 | 25.09 | top 24.4% | 548 / 2,659 | |
| Clock | 10.58 | 12.34 | top 28.0% | 294 / 1,095 |
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 Aug 2026Four personal bests in one day at Winding Down in Willetton 2026.
- 6 Jan 2024First sub-10 3×3: 8.29 at Cubing at The Cube 2024.
- 6 Jan 2024Three personal bests in one day at Cubing at The Cube 2024.
- 21 Jan 2023Three personal bests in one day at Perth Summer 2023.
- 30 Sep 2022Seven personal bests in one day at Australian Nationals 2022.
- 25 Jun 2022Three personal bests in one day at WA Open 2022.
Competitions
- Winding Down in Willetton 2026 · 15 Aug 2026 — 4 personal bests set
- WA Side State Championship 2025 · 6 Sep 2025
- Rubik's WCA Oceanic Championship 2024 · 19 Dec 2024 — 1 personal best set
- Cubing at The Cube 2024 · 6 Jan 2024 — 3 personal bests set
- Pinjarra Puzzle Party 2023 · 16 Jul 2023 — 2 personal bests set
- Perth Summer 2023 · 21 Jan 2023 — 3 personal bests set
- Australian Nationals 2022 · 30 Sep 2022 — 7 personal bests set
- WA Open 2022 · 25 Jun 2022 — 3 personal bests set
- Perth Autumn 2022 · 19 Mar 2022 — 2 personal bests set
- Fremantle Fast Fingers 2021 · 10 Oct 2021 — 2 personal bests set
- WA State Championship 2021 · 17 Jul 2021 — 3 personal bests set
- Craigie Cube-Off 2021 · 28 Mar 2021 — 1 personal best set
- Showground Showdown 2021 · 30 Jan 2021 — 4 personal bests set
- Speedy South Perth 2020 · 14 Nov 2020 — 2 personal bests set
- Perth Late Night 2020 · 9 Aug 2020
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 her.
- Jonathan Charlesworth — met in 124 rounds, finished ahead 7 times
- Amy Smith — met in 120 rounds, finished ahead 40 times
- Joshua Hounslow — met in 114 rounds, finished ahead 16 times
Next targets
- A sub-30 Megaminx single — 75 people have one; it is 7.53 away.
- A sub-6 3×3 single — 1,376 people have one; it is 1.20 away.
Targets move as she improves.