People · Netherlands

Jacco Krijnen

2×2 · top 3.6% of 186,767 all-time · competing since November 2007 · 2007KRIJ01

Jacco Krijnen has been competing for 19 years. His best event is the 2×2: a personal-best single of 1.80, set at Dutch Open 2009, puts him in the top 3.6% of the 186,767 people who have ever been ranked in the event, and 84th in the Netherlands. Until February 2008, no official 2×2 solve in the world had been that fast. Across 15 competitions since November 2007, he has put 425 official solves on the record across 15 events. Solve to solve, his 3×3 times vary about 10% around a typical one, steadier than 95% of the 35,811 competitors with ten or more counted rounds. His 3×3 best has come down from 1:02.43 in November 2007 to 12.05, an 81% improvement. Jacco has entered 15 competitions, more competitions than 95% of everyone who has ever competed.

2×2

best event — top 3.6% of 186,767 all-time

1.80

signature single · Dutch Open 2009

425

official solves on the record

10%

solve-to-solve spread · steadier than 95% of the field

Standing, event by event

vs everyone ever ranked

Event	PB single	PB average		Netherlands
2×2	1.80	4.63	top 3.6%	84 / 1,665
3×3	12.05	14.02	top 14.1%	395 / 2,294
3×3 Fewest Moves	30 moves	—	top 14.8%	29 / 167
3×3 one-handed	19.94	22.75	top 20.3%	125 / 726
Clock	9.68	10.74	top 23.5%	114 / 466
Pyraminx	7.25	11.07	top 29.9%	511 / 1,283
4×4	54.46	1:04.53	top 30.1%	287 / 1,000
3×3 blindfolded	1:53.21	—	top 31.1%	37 / 132
Megaminx	1:58.52	2:02.47	top 44.9%	191 / 414
5×5	1:57.18	2:08.96	top 47.5%	240 / 532
Square-1	31.58	34.60	top 52.4%	202 / 407
3×3 Multi-Blind	2 of 2 cubes · 18:08	—	top 73.3%	35 / 44
6×6	5:12.55	6:59.23	early days — 3 solves	185 / 205
7×7	8:43.46	9:21.27	early days — 3 solves	162 / 169
4×4 blindfolded	36:16.00	—	early days — 1 solve	21 / 22

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

Best single per competition, 3×3. Faster is higher — the axis is the right way up.

The story so far

13 Nov 2010Five personal bests in one day at Dutch Nationals 2010.
9 Oct 2009Five personal bests in one day at World Rubik's Cube Championship 2009.
21 Feb 2009First sub-15 3×3: 12.44 at Benelux Open 2009.
21 Feb 2009Seven personal bests in one day at Benelux Open 2009.
18 Oct 2008Six personal bests in one day at Dutch Open 2008.
23 Aug 2008First sub-30 3×3: 18.44 at Dutch Masters 2008.

Competitions

Dutch Nationals 2014 · 28 Sep 2014
Dutch Open 2011 · 29 Oct 2011
NEMO Amsterdam Open 2011 · 2 Apr 2011
Dutch Nationals 2010 · 13 Nov 2010 — 5 personal bests set
Dutch Open 2010 · 16 Oct 2010 — 1 personal best set
Dutch Nationals 2009 · 14 Nov 2009 — 2 personal bests set
Dutch Open 2009 · 17 Oct 2009 — 2 personal bests set
World Rubik's Cube Championship 2009 · 9 Oct 2009 — 5 personal bests set
Benelux Open 2009 · 21 Feb 2009 — 7 personal bests set
Dutch Nationals 2008 · 15 Nov 2008 — 1 personal best set
Dutch Open 2008 · 18 Oct 2008 — 6 personal bests set
Dutch Masters 2008 · 23 Aug 2008 — 9 personal bests set
Benelux Open 2008 · 16 Feb 2008
Belgian Open 2008 · 2 Feb 2008 — 1 personal best set
Dutch Championship 2007 · 24 Nov 2007

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.

Erik Akkersdijk — met in 132 rounds, finished ahead 25 times · head to head
Mats Valk — met in 112 rounds, finished ahead 32 times
Ron van Bruchem — met in 103 rounds, finished ahead 51 times

Next targets

A sub-1 2×2 single — 1,032 people have one; it is 0.80 away.
A sub-12 3×3 single — 39,535 people have one; it is 0.05 away.

Targets move as he improves.