Sunday 6 September 2026 Rebuilt nightly from the WCA's official results · export of 6 September 2026 · About
The Middle Three
People → Poland → Kacper Jach

People · Poland

Kacper Jach

Skewb · top 2.9% of 73,281 all-time · competing since September 2013 · 2013JACH02

Kacper Jach has been competing for 13 years. His best event is the Skewb: a personal-best single of 2.50, set at ŚLS Wodzisław Śląski 2015, puts him in the top 2.9% of the 73,281 people who have ever been ranked in the event, and 164th in Poland. Until February 2014, no official Skewb solve in the world had been that fast. Across 29 competitions since September 2013, he has put 830 official solves on the record across seven events. Solve to solve, his 3×3 times vary about 15% around a typical one; 87% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His Skewb best has come down from 16.51 in January 2014 to 2.50, an 85% improvement. Kacper has entered 29 competitions, more competitions than 98% of everyone who has ever competed.

Skewb
best event — top 2.9% of 73,281 all-time
2.50
signature single · ŚLS Wodzisław Śląski 2015
830
official solves on the record
15%
solve-to-solve spread · wider than 87% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingPoland
Skewb2.505.40
top 2.9%164 / 2,810
Pyraminx4.308.56
top 9.2%593 / 4,406
2×22.544.57
top 9.3%715 / 5,422
3×313.2117.20
top 18.2%1,445 / 6,576
3×3 one-handed32.3248.33
top 51.9%1,041 / 2,176
4×41:21.981:36.17
top 57.5%1,498 / 2,851
5×52:47.60—
top 73.7%1,057 / 1,442

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

SLS Bielsko-Biala 2014: 16.51SLS Gliwice 2014: 7.31SLS Rybnik 2014: 7.61SLS Tarnowskie Gory 2014: 4.77Aleksandrus Cube 2014: 7.85Polish Nationals 2014: 8.39Santa Claus Cube Race 2014: 3.62Polish Open 2015: 3.83ŚLS Zawiercie 2015: 4.80Radomsko Cube Theory 2015: 4.76ŚLS Sosnowiec 2015: 3.74Kaliska Open 2015: 3.74Warsaw Cube Masters 2015: 4.60ŚLS Wodzisław Śląski 2015: 2.50Santa Claus Cube Race 2015: 3.26European Rubik's Cube Championship 2016: 3.81SLS Gliwice 2017: 4.22ŚLS Będzin Open 2017: 3.97Polish Nationals 2017: 4.91Polish Open 2018: 6.37Byczy Cube Race 2019: 4.02Project Będzin 2019: 3.88Santa Claus Cube Race Poland 2019: 4.882.5016.5118 Jan 20146 Dec 2019

Best single per competition, Skewb. Faster is higher — the axis is the right way up.

The story so far

Competitions

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.

Next targets

  • A sub-2 Skewb single — 1,013 people have one; it is 0.50 away.
  • A sub-4 Pyraminx single — 9,892 people have one; it is 0.30 away.

Targets move as he improves.