What is the hardest puzzle you've been able to solve on your own?

[Puzzlesolver]

Mine is maybe a ghost cube.

 

[PianoCube]

Gigaminx. Just used what I knew from megaminx and big cubes.

 

[TDM]

3x3 took me the longest: about a month. Although that was before I started cubing, so I didn't really know what I was doing. I could solve 4x4 up to parity, then I just scrambled and started again until I got no parity The others I've been able to solve were 2x2 (easy), Mega (just like a big 3x3) and 3BLD (I'd heard that you used PLLs, but that was all. I tried to do as much as possible after that without any help).

 

[Jaysammey777]

Helicopter cube took me 2 months

 

[TheLizardWizard]

I was able to solve the pyraminx crystal, as well as some weird 3x3 mods. My friend figured out how to solve a square-1 AND the rex cube on his own though

 

[~Adam~]

4x4 Ghost Cube, UltraMorphix, Fail Cube, Golden Cube

 

[Owen]

Megaminx, helicopter cube.

 

[Renslay]

Latch Cube. It's a little monster.

 

[patrickcuber]

Megaminx.

 

[antoineccantin]

Gigaminx, and pretty much the only puzzle I was able to solve by myself. Other than that it would probably be the 15-puzzle

 

[Daniel Mizrahi]

MEGAMINX

 

[PeelingStickers]

mega or 5x5.

 

[F3L]

Only a mirror cube lol.

BTW I'm new here

 

[RageCuber]

Only a mirror cube lol.

BTW I'm new here

Welcome! Also that was the hardest one for me too.
I recommend you introduce yourself in the http://www.speedsolving.com/forum/forumdisplay.php?25-Member-Introductions
member introduction section

 

[uberCuber]

I guess megaminx and bigcubes 5x5+

 

[Cuber9991]

Megaminx, Mastermorphix, or Axis Cube

 

[LNZ]

Missing Link and Whip-It (as I was a pre-internet solver of puzzles).

 

[brian724080]

Hardest puzzle I've solved myself is Megaminx so far, the Mirror Blocks puzzle was annoying because my friend gave me a Rubik's brand Mirror Blocks puzzle. The Megaminx wasn't so bad, it's just "F2L" over and over again.

 

[Antonie faz fan]

11x11

 

[BaMiao]

Curvey Starminx. Had it solved by midnight the day I got it.