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The Middle Three
People → Brazil → Roberto Caldas

People · Brazil

Roberto Caldas

Clock · top 2.9% of 32,048 all-time · competing since April 2017 · 2017CALD04

Roberto Caldas has been competing for 9 years. His best event is the Clock: a personal-best single of 4.29, set at Partage Open 2023, puts him in the top 2.9% of the 32,048 people who have ever been ranked in the event, and 12th in Brazil. Until June 2015, no official Clock solve in the world had been that fast. Across 30 competitions since April 2017, he has put 1,119 official solves on the record across 15 events. Solve to solve, his 3×3 times vary about 12% around a typical one, steadier than 76% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 22.72 in April 2017 to 9.34, a 59% improvement. Roberto has entered 30 competitions, more competitions than 98% of everyone who has ever competed.

Clock
best event — top 2.9% of 32,048 all-time
4.29
signature single · Partage Open 2023
1,119
official solves on the record
12%
solve-to-solve spread · steadier than 76% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingBrazil
Clock4.295.68
top 2.9%12 / 723
3×39.3412.88
top 5.7%267 / 9,644
2×22.324.71
top 7.2%232 / 5,137
Pyraminx5.3510.24
top 15.4%367 / 3,208
3×3 one-handed19.0024.12
top 17.8%257 / 1,992
Skewb5.1411.50
top 19.3%225 / 1,463
3×3 blindfolded1:34.322:08.97
top 24.7%59 / 333
4×451.9959.12
top 27.1%360 / 1,855
5×52:20.022:36.97
top 61.1%416 / 845
Megaminx2:58.523:23.34
top 73.8%698 / 1,062
3×3 Multi-Blind5 of 8 cubes · 53:49—
top 79.6%92 / 117
Square-157.611:15.89
top 82.1%518 / 647
6×65:27.495:40.66
top 86.4%229 / 307
3×3 Fewest Moves54 moves—
early days — 3 solves312 / 360
7×79:54.26—
early days — 1 solve231 / 269

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

Faria Brito Open 2017: 22.72Mato Grande Open 2018: 15.74I Mineirim Open 2018: 14.05Faria Brito Open 2018: 14.45II CEFET-MG UAI Bits Open 2018: 14.63Brasília Open 2018: 16.70Campeonato Brasileiro 2018: 15.51Torneio Mestre Álvaro 2018: 13.33Faria Brito Open 2019: 15.43Cubo Uai Belo Horizonte Open 2019: 13.87KubeKids Vila Velha 2019: 12.37Pequi Open 2020: 12.48Faria Brito Open 2022: 14.52SAJ Águas da Prata 2022: 11.37Rubik's WCA South American Championship 2022: 13.11Planeta.Rio Open 2022: 12.23Etec Cubatão 2022: 11.20Festival ONCUBE Lindóia 2022: 12.03Partage Open 2023: 13.48UNIVR Open 2023: 9.34SAJ Águas da Prata 2023: 12.38Bora Bora Barra Open 2023: 11.65Partage Open II 2023: 11.49Rio Cubolympics 2025: 11.11Center Shopping Jacarepaguá Open 2025: 13.639.3422.7229 Apr 20176 Dec 2025

Best single per competition, 3×3. 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-4 Clock single — 741 people have one; it is 0.29 away.
  • A sub-8 3×3 single — 7,931 people have one; it is 1.34 away.

Targets move as he improves.