People · Australia

Tiana Diachenko

Pyraminx · top 5.3% of 129,321 all-time · competing since September 2015 · 2015DIAC01

Tiana Diachenko has been competing for 11 years. Her best event is the Pyraminx: a personal-best single of 3.47, set at Brisbane Is Back On 2021, puts her in the top 5.3% of the 129,321 people who have ever been ranked in the event, and 239th in Australia. Until February 2008, no official Pyraminx solve in the world had been that fast. Across 14 competitions since September 2015, she has put 519 official solves on the record across 14 events. Solve to solve, her 3×3 times vary about 11% around a typical one, steadier than 85% of the 35,811 competitors with ten or more counted rounds. Her 3×3 best has come down from 23.38 in September 2015 to 13.30, a 43% improvement. Tiana has entered 14 competitions, more competitions than 95% of everyone who has ever competed.

Pyraminx

best event — top 5.3% of 129,321 all-time

3.47

signature single · Brisbane Is Back On 2021

519

official solves on the record

11%

solve-to-solve spread · steadier than 85% of the field

Standing, event by event

vs everyone ever ranked

Event	PB single	PB average		Australia
Pyraminx	3.47	6.34	top 5.3%	239 / 5,993
2×2	3.34	4.79	top 18.3%	1,370 / 8,567
3×3	13.30	14.92	top 18.5%	1,656 / 11,709
5×5	1:29.05	1:37.83	top 26.5%	357 / 1,356
4×4	51.49	1:01.24	top 26.5%	688 / 3,051
7×7	3:48.50	4:20.24	top 26.6%	121 / 523
Skewb	6.64	10.31	top 30.8%	852 / 3,534
3×3 blindfolded	2:10.09	—	top 36.7%	161 / 394
Square-1	26.25	46.99	top 41.9%	404 / 899
3×3 one-handed	30.95	39.71	top 48.8%	1,132 / 2,659
6×6	3:17.40	3:27.04	top 49.2%	298 / 641
Megaminx	2:10.13	2:45.14	top 51.3%	624 / 1,277
Clock	16.74	18.71	top 54.5%	562 / 1,095
3×3 Fewest Moves	52 moves	58.67	top 83.5%	371 / 468

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

11 Jan 2020Four personal bests in one day at Northside Cube Days 2020.
21 Sep 2019Four personal bests in one day at Gold Coast Spring 2019.
6 Oct 2018Three personal bests in one day at Australian Nationals 2018.
16 Sep 2017Three personal bests in one day at Brisbane Winter 2017.
17 Dec 2016First sub-15 3×3: 13.70 at Sydney Championship 2016.
17 Dec 2016Four personal bests in one day at Sydney Championship 2016.

Competitions

Australian Nationals 2026 · 9 Jul 2026 — 2 personal bests set
Brisbane Is Back On 2021 · 16 Jan 2021 — 1 personal best set
Northside Cube Days 2020 · 11 Jan 2020 — 4 personal bests set
Gold Coast Spring 2019 · 21 Sep 2019 — 4 personal bests set
WCA World Championship 2019 · 11 Jul 2019
Australian Nationals 2018 · 6 Oct 2018 — 3 personal bests set
Brisbane Winter 2018 · 30 Jun 2018 — 1 personal best set
Canberra Autumn 2018 · 21 Apr 2018 — 1 personal best set
Brisbane Winter 2017 · 16 Sep 2017 — 3 personal bests set
Sydney Championship 2016 · 17 Dec 2016 — 4 personal bests set
Australian Nationals 2016 · 20 Aug 2016 — 6 personal bests set
Canberra Autumn 2016 · 21 May 2016 — 5 personal bests set
Sydney Summer 2015 · 19 Dec 2015 — 1 personal best set
Brisbane Spring 2015 · 19 Sep 2015

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.

Edbert Sim — met in 77 rounds, finished ahead 13 times
David Pearce — met in 71 rounds, finished ahead twice
Feliks Zemdegs — met in 69 rounds, finished ahead once

Next targets

A sub-3 Pyraminx single — 4,700 people have one; it is 0.47 away.
A sub-3 2×2 single — 26,570 people have one; it is 0.34 away.

Targets move as she improves.