People · Sri Lanka
Sujan Irosha Kumarapperuma
4×4 · top 0.25% of 83,917 all-time · competing since December 2019 · 2019KUMA59
Sujan Irosha Kumarapperuma has been competing for 7 years. His best event is the 4×4: a personal-best single of 22.45, set at Colombo CubeCon 2025, puts him in the top 0.25% of the 83,917 people who have ever been ranked in the event, and 1st in Sri Lanka. Until August 2014, no official 4×4 solve in the world had been that fast. Across 11 competitions since December 2019, he has put 598 official solves on the record across twelve events. Solve to solve, his 3×3 times vary about 14% around a typical one; 77% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His 3×3 best has come down from 9.96 in December 2019 to 6.79, a 32% improvement. Sujan has entered eleven competitions, more competitions than 93% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Sri Lanka | |
|---|---|---|---|---|---|
| 4×4 | 22.45 | 29.12 | top 0.25% | 1 / 209 | |
| 2×2 | 1.02 | 2.75 | top 0.59% | 3 / 431 | |
| Pyraminx | 1.75 | 2.85 | top 0.75% | 2 / 348 | |
| 3×3 | 6.79 | 8.47 | top 1.1% | 1 / 590 | |
| 5×5 | 48.23 | 59.08 | top 1.3% | 2 / 88 | |
| 7×7 | 2:40.20 | 3:02.46 | top 5.5% | 2 / 23 | |
| Megaminx | 53.28 | 1:01.83 | top 6.6% | 1 / 68 | |
| 6×6 | 1:51.53 | 2:04.83 | top 7.8% | 2 / 31 | |
| 3×3 one-handed | 15.20 | 16.92 | top 8.5% | 6 / 186 | |
| Skewb | 4.62 | 6.32 | top 15.4% | 21 / 141 | |
| 3×3 Fewest Moves | 39 moves | 43.33 | top 44.7% | 14 / 37 | |
| Clock | 34.06 | — | early days — 3 solves | 49 / 55 |
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
- 27 Sep 2025Three personal bests in one day at Colombo CubeCon 2025.
- 7 Jun 2024Three personal bests in one day at Sri Lankan Nationals 2024.
- 9 Mar 2024Seven personal bests in one day at Marawila Cubing Challenge 2024.
- 30 Dec 2023Three personal bests in one day at Matale Cubing Year-End 2023.
- 7 Apr 2023Five personal bests in one day at Colombo Matrix Open 2023.
- 5 Apr 2023Four personal bests in one day at Cubing Rajarata Open 2023.
Competitions
- Nattandiya Cubing Clash 2025 · 20 Oct 2025 — 2 personal bests set
- Colombo CubeCon 2025 · 27 Sep 2025 — 3 personal bests set
- Sri Lankan Nationals 2024 · 7 Jun 2024 — 3 personal bests set
- Marawila Cubing Challenge 2024 · 9 Mar 2024 — 7 personal bests set
- Matale Cubing Year-End 2023 · 30 Dec 2023 — 3 personal bests set
- Colombo Cubing Christmas 2023 · 23 Dec 2023 — 2 personal bests set
- Melbourne Cubing for Kids Sunday 2023 · 27 Aug 2023
- Colombo Matrix Open 2023 · 7 Apr 2023 — 5 personal bests set
- Cubing Rajarata Open 2023 · 5 Apr 2023 — 4 personal bests set
- Cubing Returns To Colombo 2022 · 24 Sep 2022 — 5 personal bests set
- Surf Coast Cubing 2019 · 29 Dec 2019 — 1 personal best set
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.
- Samath Keppitiyagama — met in 85 rounds, finished ahead 71 times · head to head
- Manija Kalansooriya — met in 84 rounds, finished ahead 75 times
- Sirima Witharanage Sathmika Navoda — met in 84 rounds, finished ahead 75 times
Next targets
- A sub-20 4×4 single — 42 people have one; it is 2.45 away.
- A sub-1 2×2 single — 1,032 people have one; it is 0.02 away.
Targets move as he improves.