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People · United Kingdom

Mark Ostrom

5×5 · top 1.8% of 41,402 all-time · competing since April 2017 · 2017OSTR01

Mark Ostrom has been competing for 10 years. His best event is the 5×5: a personal-best single of 50.25, set at Rubik's UK Championship 2023, puts him in the top 1.8% of the 41,402 people who have ever been ranked in the event, and 31st in the United Kingdom. Until August 2014, no official 5×5 solve in the world had been that fast. Across 40 competitions since April 2017, he has put 2,564 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 36,406 competitors with ten or more counted rounds. His 3×3 best has come down from 15.17 in April 2017 to 7.69, a 49% improvement. Mark has entered 40 competitions, more competitions than 99% of everyone who has ever competed.

5×5
best event — top 1.8% of 41,402 all-time
50.25
signature single · Rubik's UK Championship 2023
2,564
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 standingUnited Kingdom
5×550.251:03.53
top 1.8%31 / 1,167
7×72:19.092:28.16
top 2.3%6 / 463
3×37.6910.68
top 2.3%189 / 6,785
6×61:34.151:44.05
top 2.7%15 / 560
4×429.7536.33
top 2.7%65 / 2,112
Pyraminx3.395.58
top 5.0%192 / 3,704
2×22.353.95
top 7.5%521 / 4,946
3×3 one-handed14.7217.36
top 7.6%147 / 1,861
Megaminx56.361:03.56
top 8.1%103 / 998
Clock6.888.70
top 10.4%137 / 1,255
Skewb4.2912.23
top 13.0%303 / 2,439
Square-139.1750.67
top 64.4%531 / 789

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

Newcastle-under-Lyme Open 2017: 15.17August Bank Holiday Competition 2017: 13.64Weston-super-Mare Open 2017: 12.81August Bank Holiday Competition 2018: 11.43UK Championship 2018: 11.78Cambridge Open 2018: 9.17Fontwell Open 2019: 10.46Lincoln Open 2019: 9.33London Open 2019: 9.23UK Championship 2019: 9.60Guildford Open 2020: 9.05Fontwell Open 2020: 9.36Manchester Open 2020: 9.86Dragon Cubing 2021: 9.68Wakefield Open 2022: 10.38Weston-super-Mare Open 2022: 9.10Glasgow Open 2022: 9.04Stevenage Summer 2022: 9.70Lincoln Summer 2022: 8.99Droitwich Spa Autumn 2022: 8.78Kewbz UK Championship 2022: 10.52Weston-super-Mare Autumn 2022: 9.62Essex Winter 2022: 9.21Wiltshire Winter 2023: 9.86Guildford Winter 2023: 9.62Douvrin Open 2023: 10.34Weston-super-Mare Spring 2023: 9.28Exeter Summer 2023: 9.37Irish Championship 2023: 9.84Lincolnshire Summer 2023: 10.37Silesian Cubing Pawłowice 2023: 9.98Wiltshire Autumn 2023: 9.94Rubik's UK Championship 2023: 9.63Guildford Autumn 2023: 7.69Bristol Winter 2024: 10.56Chichester Summer 2024: 10.16Rubik's UK Championship 2024: 10.60Weston-super-Mare Autumn 2024: 9.477.6915.1715 Apr 201716 Nov 2024

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-50 5×5 single — 733 people have one; it is 0.25 away.
  • A sub-2:00 7×7 single — 86 people have one; it is 19.09 away.

Targets move as he improves.