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The Middle Three
People → Singapore → Koh Zi Yi

People · Singapore

Koh Zi Yi

Square-1 · top 0.59% of 25,272 all-time · competing since December 2022 · 2022YIKO01

Koh Zi Yi has been competing for 4 years. His best event is the Square-1: a personal-best single of 5.67, set at Back to Downtown Singapore 2026, puts him in the top 0.59% of the 25,272 people who have ever been ranked in the event, and 4th in Singapore. Until March 2018, no official Square-1 solve in the world had been that fast. Across 48 competitions since December 2022, he has put 1,937 official solves on the record across twelve events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 52% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 12.92 in December 2022 to 7.05, a 45% improvement. Koh has entered 48 competitions, more competitions than 99% of everyone who has ever competed.

Square-1
best event — top 0.59% of 25,272 all-time
5.67
signature single · Back to Downtown Singapore 2026
1,937
official solves on the record
13%
solve-to-solve spread · steadier than 52% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingSingapore
Square-15.677.88
top 0.59%4 / 132
4×425.7628.75
top 0.92%14 / 462
5×546.5251.06
top 0.92%12 / 251
3×37.058.35
top 1.4%42 / 1,546
Pyraminx2.293.08
top 1.7%24 / 645
6×61:29.491:36.55
top 1.8%13 / 125
3×3 one-handed11.4614.05
top 2.3%25 / 460
7×72:22.872:27.92
top 2.7%12 / 96
Megaminx47.5452.02
top 4.0%20 / 195
2×21.983.76
top 4.6%79 / 1,053
Skewb4.076.19
top 11.4%59 / 353
Clock8.669.86
top 18.3%59 / 178

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

NTU Welcome 2023: 12.92Singapore AMK CC Cubing B 2023: 11.07NTU Speedcubing 2023: 11.88MYHM Singapore Championship 2024: 9.92Singapore Newcomers 2024: 9.63Singapore Mini 2024: 7.94Singapore 50 and Counting 2024: 9.25Mofunland Speedcubing Singapore 2024: 9.25Cool Down Singapore 2024: 8.31Singapore Marine Terrace Breeze RN 2024: 8.95Singapore Freeze 2024: 9.63Singapore Championship 2025: 8.54Singapore Skewby March 2025: 9.13No Parity Mayhem Singapore 2025: 8.44Singapore Jumbo June 2025: 8.55Singapore Mofunland Cruise 2025: 8.02Coping in July Singapore 2025: 7.56Singapore Independence Day 2025: 7.95Mofunland Speedcubing Singapore 2025: 7.13NUS Open 2025: 8.63Singapore Two-Day Nov 2025: 7.85Singapore Sprint November 2025: 7.91Singapore Warm Up January 2026: 9.40Singapore Championship 2026: 7.05Back to Downtown Singapore 2026: 7.80MYHM UoSM Final Cube Open 2026: 7.92Singapore Double or Nothing Parity Mayhem 2026: 9.21Odd July Singapore 2026: 7.83Mofunland Speedcubing Singapore 2026: 8.527.0512.9231 Dec 20225 Sep 2026

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-5 Square-1 single — 68 people have one; it is 0.67 away.
  • A sub-25 4×4 single — 588 people have one; it is 0.76 away.

Targets move as he improves.