People · Sri Lanka
Rukmanthanan Sellamuttu
2×2 · top 32.4% of 186,767 all-time · competing since December 2023 · 2023SELL05
Rukmanthanan Sellamuttu has been competing for 3 years. His best event is the 2×2: a personal-best single of 4.46, set at Colombo CubeCon 2025, puts him in the top 32.4% of the 186,767 people who have ever been ranked in the event, and 103rd in Sri Lanka. Across 3 competitions since December 2023, he has put 56 official solves on the record across five events. His 2×2 best has come down from 7.34 in December 2023 to 4.46, a 39% improvement. Rukmanthanan has entered three competitions, more competitions than 69% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | Sri Lanka | |
|---|---|---|---|---|---|
| 2×2 | 4.46 | 7.08 | top 32.4% | 103 / 431 | |
| 3×3 | 21.03 | 25.92 | top 42.8% | 239 / 590 | |
| Pyraminx | 9.79 | 13.71 | top 51.4% | 162 / 348 | |
| 3×3 one-handed | 38.49 | 45.56 | top 63.1% | 92 / 186 | |
| Skewb | 17.26 | 30.75 | top 84.6% | 124 / 141 |
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, 2×2. 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.
- 8 Mar 2025Three personal bests in one day at Colombo Cubing Revival 2025.
- 23 Dec 2023First competition: Colombo Cubing Christmas 2023. A 26.52 3×3 single to start from.
Competitions
- Colombo CubeCon 2025 · 27 Sep 2025 — 3 personal bests set
- Colombo Cubing Revival 2025 · 8 Mar 2025 — 3 personal bests set
- Colombo Cubing Christmas 2023 · 23 Dec 2023
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.
- Dewni Prasadi Lakshika Fernando — met in 12 rounds, finished ahead 7 times
- Akshana Sanudaya — met in 12 rounds, finished ahead 3 times
- Samath Keppitiyagama — met in 12 rounds, finished ahead twice
Next targets
- A sub-4 2×2 single — 49,452 people have one; it is 0.46 away.
- A sub-20 3×3 single — 113,584 people have one; it is 1.03 away.
Targets move as he improves.