sqAree
Veteran
Additional information is always nice. What I dislike tho is that the profile's subsections are less compact compared to before.
Ordway Persyn
Veteran
- Joined
- Sep 24, 2014
- Messages
- 2,236
- Location
- Mimal the Elf's boot
- WCA ID
- 2016PERS01
- YouTube
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Yeah, I believe those where made by the rubik's brand.
Did the Edison/Joy cube come out before the Alpha I??
mark49152
Premium Member
Yeah I agree and I don't like that now only one event is visible at a time. It's irritating having to click the tabs especially when you also have to scroll left and right so much to see the content, on mobile.
Luke8
Regular
I just changed my profile pic because a new forum user did the same one.
U
Underwatercuber
Guest
My Lubicle 1 just came! This stuff is freakin nuts. It makes my cubes insanely fast. I think it is like DNM37 2.0!
TheSilverBeluga
Veteran
The WCA statistics page added sub-5 solves to "most sub-X solves in Rubik's Cube." No one has more than one... yet.
U
Underwatercuber
Guest
Feliks and Max are the only two who get them somewhat frequently unnoficcially. Feliks gets more but max is improving quickly
Dr_Detonation
Regular
His rate of improval is amazing
joshsailscga
Veteran
Or that Max and Feliks are the only ones who post videos of their solves very frequently. I'm sure there are other cubers who get fairly frequent 4's.
guysensei1
Legend
I recall having read that the pochmann style scrambling for megaminx cannot reach all megaminx positions, how is this proven?
whauk
Veteran
The number of possible Megaminx scrambles is bigger than the number of positions that can be reached with a Pochmann style scramble.
shadowslice e
Legend
You have (4^10)^7*2^7 different position in pochmann whixh is around 1.78e44 compared to around 20!*40!*3^20*2^20/2/3= 1.27e87 so dicounting symmetries for both is is fairly clear that pochmann would need quite a few more turns to even have the same number of possibilities (and would even then likely have many duplicate positions).
This is similar to how the lower bound of 18 was reached for 3x3.
guysensei1
Legend
How did you get the number of positions for pochmann? I am confused
shadowslice e
Legend
It's just the number of turn sequences (and it turns out I got it slightly wrong but that actually reduces the number of positions) The correct calculation is (2^10)^7*2^7=2^77=1.51e23
2^10 because you have 10 R and D moves in each line (++ or -- each time) and when you do a U or U' you also have two choices (but 7 times so 2^7). The ^7 is because there are 7 lines
Wait, don't the standard scramble sequences always end with D++ U or D-- U' in each line? That would mean that there's no 2^7 contribution from the U and U' choice.
shadowslice e
Legend
They do but doesn't the U/U' affect the rotation so the R would affect different pieces depending on the combination of U and D moves wouldn't it?
In the same way that doing d U r2 is not the same as d U' R2 or d' U' R2
Yeah, but this ultimately doesn't affect the number of 70-move Pochmann-style scrambles, which is 2^70.
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YouCubing
Veteran
fun fact: out of next weekend's 14 competitions (which isn't a lot compared to many of the recent weeks), 6 don't have 3x3. that's almost half.
TheSilverBeluga
Veteran
In the 6.25 Bay Area competition, the format for 2x2 will be "best of 1." Because, why not?
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