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People → Singapore → Jacob Keh (郭正兴)

People · Singapore

Jacob Keh (郭正兴)

Clock · top 0.35% of 32,048 all-time · competing since November 2023 · 2023XING02

Jacob Keh (郭正兴) has been competing for 3 years. His best event is the Clock: a personal-best single of 2.63, set at Singapore Skewby March 2025, puts him in the top 0.35% of the 32,048 people who have ever been ranked in the event, and 8th in Singapore. Until June 2023, no official Clock solve in the world had been that fast. Across 49 competitions since November 2023, he has put 926 official solves on the record across 17 events. Solve to solve, his 3×3 times vary about 17% around a typical one; 94% of the 35,811 competitors with ten or more counted rounds hold a tighter spread. His Clock best has come down from 9.42 in April 2024 to 2.63, a 72% improvement. Jacob has entered 49 competitions, more competitions than 99% of everyone who has ever competed.

Clock
best event — top 0.35% of 32,048 all-time
2.63
signature single · Singapore Skewby March 2025
926
official solves on the record
17%
solve-to-solve spread · wider than 94% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingSingapore
Clock2.633.97
top 0.35%8 / 178
3×3 blindfolded19.6728.96
top 1.2%2 / 81
Pyraminx2.244.55
top 1.6%23 / 645
3×3 Multi-Blind25 of 29 cubes · 54:58—
top 4.2%3 / 35
4×432.4634.82
top 4.5%46 / 462
2×22.013.47
top 4.8%83 / 1,053
4×4 blindfolded2:30.55—
top 5.2%2 / 17
3×39.3211.17
top 5.6%148 / 1,546
3×3 one-handed14.7818.90
top 7.7%61 / 460
Megaminx58.381:03.11
top 9.1%36 / 195
5×51:06.431:15.96
top 9.3%45 / 251
6×62:09.262:19.38
top 15.0%37 / 125
5×5 blindfolded8:47.54—
top 16.5%3 / 11
3×3 Fewest Moves31 moves36.33
top 17.4%24 / 94
Square-118.5321.77
top 24.6%58 / 132
Skewb5.867.13
top 24.7%121 / 353
7×74:05.394:39.74
top 32.8%53 / 96

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

Singapore Sides Standoff 2024: 9.42Singapore Clock Clash 2024: 6.69Good Time at Beletime 2024: 5.37Singapore Sprint 2024: 5.73Singapore Masters 2024: 3.71Rubik's WCA Asian Championship 2024: 4.47Cool Down Singapore 2024: 3.75Singapore Championship 2025: 3.18Singapore Small and Sides Feb 2025: 3.20Singapore Skewby March 2025: 2.63Don't DNF March Singapore 2025: 4.06Singapore Mid April 2025: 4.25Singapore Cubing Mayday 2025: 3.19Just Solve It July Singapore 2025: 3.41Vietnam Championship 2025: 3.46Singapore Championship 2026: 3.90MYHM UoSM Final Cube Open 2026: 3.87NUS Clock Clash 2026: 3.55Odd July Singapore 2026: 2.81Singapore Aug Even 2026: 3.582.639.427 Apr 20242 Aug 2026

Best single per competition, Clock. 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 Clock single — 17 people have one; it is 0.63 away.
  • A sub-15 3×3 blindfolded single — 19 people have one; it is 4.67 away.

Targets move as he improves.