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People · Ireland

Mary Hennessy

2×2 · top 1.6% of 186,767 all-time · competing since July 2015 · 2015HENN02

Mary Hennessy has been competing for 11 years. Her best event is the 2×2: a personal-best single of 1.36, set at Let's Go Carlow 2025, puts her in the top 1.6% of the 186,767 people who have ever been ranked in the event, and 33rd in Ireland. Until November 2008, no official 2×2 solve in the world had been that fast. Across 99 competitions since July 2015, she has put 4,195 official solves on the record across 13 events. Solve to solve, her 3×3 times vary about 12% around a typical one, steadier than 71% of the 35,811 competitors with ten or more counted rounds. Her 3×3 best has come down from 15.05 in July 2015 to 10.28, a 32% improvement. Mary has entered 99 competitions, more competitions than 99% of everyone who has ever competed.

2×2
best event — top 1.6% of 186,767 all-time
1.36
signature single · Let's Go Carlow 2025
4,195
official solves on the record
12%
solve-to-solve spread · steadier than 71% of the field

Standing, event by event

vs everyone ever ranked
EventPB singlePB averageAll-time standingIreland
2×21.364.28
top 1.6%33 / 1,163
3×310.2813.49
top 8.3%129 / 1,427
Pyraminx4.376.93
top 9.6%125 / 911
4×442.4748.55
top 15.0%86 / 579
Clock8.6611.89
top 18.3%73 / 331
5×51:20.521:31.54
top 19.5%62 / 296
Megaminx1:35.341:51.10
top 31.6%94 / 283
6×62:49.533:02.13
top 35.9%53 / 142
7×74:21.464:36.55
top 38.2%42 / 108
3×3 one-handed26.9135.87
top 39.1%147 / 448
3×3 Fewest Moves46 moves49.00
top 68.6%56 / 88
3×3 blindfolded4:04.88—
top 69.2%49 / 59
Skewb14.6928.54
top 77.3%500 / 624

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

Irish Championship 2015: 15.05Irish Championship 2016: 19.88Irish Championship 2017: 16.61Irish Championship 2018: 15.36WCA European Championship 2018: 16.85Manchester Open 2019: 14.98Cork Open 2019: 14.57Irish Championship 2019: 13.50Leeds Open 2019: 12.76Cubing in Cill Chainnigh 2019: 13.11UK Championship 2019: 14.81Every Event Éire 2019: 14.42Don't DNF Dublin 2020: 14.28Tuam Re-Open Saturday 2021: 13.71Seaside Solving Sunday 2022: 11.41Don't DNF Dublin 2022: 13.13Rubik's WCA European Championship 2022: 12.23Cubing with the Cats Saturday 2022: 11.44Dublin Open Sunday 2022: 11.45Cubing in Cill Chainnigh 2022: 13.25Kewbz UK Championship 2022: 12.78Irish Championship 2022: 11.42Tuam Open Sunday 2022: 12.90Belfast Winter 2023: 14.14Cork Spring 2023: 12.04Don't Lockup Loch Garman 2023: 13.96French Championship 2023: 12.96It's a Long Way to Tipperary 2023: 13.31Irish Championship 2023: 13.07Cubing with the Cats Sunday 2023: 12.01North Wales Summer 2023: 12.79Dublin Summer Solving Sunday 2023: 14.75Cubing in Cill Chainnigh 2023: 13.33Australian Nationals 2023: 13.83Meath Autumn 2023: 13.21Rubik's UK Championship 2023: 15.96Don't Fail Kinsale 2023: 14.92Rebel County Cubing 2024: 13.23Gort-a Go Fast 2024: 13.10Corduff Cubing Sunday 2024: 13.35Cork Spring 2024: 13.87Turnin' Offaly Fast 2024: 12.53UCD Cube Days 2024: 10.2850 and Counting Ireland 2024: 13.31Turnin' in Termonfeckin Sunday 2024: 12.16Belfast Summer 2024: 11.00Manchester June 2024: 13.02Rubik's Irish Championship 2024: 10.65Midlands Mix-up 2024: 13.05Rubik's WCA European Championship 2024: 12.94Cubing with the Kilkenny Cats Sunday 2024: 10.94Dublin Summer Solving 2024: 12.83Mayo Cubing 2024: 13.62Swiss Nationals 2024: 12.35Meath for Speed 2024: 11.86Tír Chonaill Cubing 2024: 12.68Don't Fail Kinsale 2024: 13.11Dublin Winter Solving 2025: 12.09Marble City Cubing IE 2025: 14.69Cork Spring 2025: 13.09Gort-a Go Fast 2025: 13.12Let's Go Carlow 2025: 14.31UCD Cube Days 2025: 13.05Don't Go Slow in Wicklow 2025: 13.58It's a Long Way to Tipperary 2025: 13.24Castletown Showdown 2025: 13.54PBs in Phibblestown 2025: 11.63Rubik's WCA World Championship 2025: 14.91Meath for Speed 2025: 13.08Rubik's Irish Championship 2025: 11.59Dublin Autumn Solving 2025: 12.78Rebel County Colours 2025: 12.67Termonfeckin Fast 2025: 11.75Re-Laois the Cubers 2025: 11.74Belfast Autumn 2025: 12.28Solving by the Barrow 2025: 12.83Rubik's Italian Championship 2025: 14.31Leopardstown Cube Races 2025: 12.63Dublin Pick 'N' Mix 2026: 12.34Marrakech Open 2026: 12.28Lets Go Carlow 2026: 12.81Cork Spring 2026: 13.79Gort-a Go Fast 2026: 10.39TUD Unscramble Day 2026: 13.21Split Open 2026: 14.25UCD Cube Days 2026: 12.48Roscommon Cubing 2026: 11.56Lets Go Back to Carlow 2026: 12.40Rubik's WCA European Championship 2026: 12.36Rubik's Irish Championship 2026: 12.12Éire 100 2026: 11.4010.2819.884 Jul 201522 Aug 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 her.

Next targets

  • A sub-1 2×2 single — 1,032 people have one; it is 0.36 away.
  • A sub-10 3×3 single — 21,172 people have one; it is 0.28 away.

Targets move as she improves.