SpeedSolving.com Puzzle Forum - General Puzzle Discussion http://www.speedsolving.com/forum/ en Wed, 19 Jun 2013 05:07:01 GMT vBulletin 60 http://www.speedsolving.com/forum/images/misc/rss.png SpeedSolving.com Puzzle Forum - General Puzzle Discussion http://www.speedsolving.com/forum/ Video cubing chain! http://www.speedsolving.com/forum/showthread.php?42546-Video-cubing-chain!&goto=newpost Tue, 18 Jun 2013 19:56:05 GMT This is just a little idea I had. I scrambled a cube and did one move. You have to do the next one :-) How? Just scramble your cube using scramble in... This is just a little idea I had. I scrambled a cube and did one move. You have to do the next one :-) How? Just scramble your cube using scramble in the description (D2 F2 R' F' D L' F2 L' U D2 L2 F' B' D' R B' U' L U2 R2 U F R F' D) and apply the moves that has been done yet ("Solution so far). Then film yourself doing the next move you would do :-)



Here are the rules:

All replies to this video are gonna be named something like "Cubing chain #02", all replies to these 03 etc.

You have to put "scramble" + "solution so far" into your response

You have to use "scramble" + "solution so far" of video you respond to

You have to do only one move (I take R2 as one move)


I hope you'll enjoy this idea :-). ]]> General Puzzle Discussion MatejMuzatko http://www.speedsolving.com/forum/showthread.php?42546-Video-cubing-chain! How much better are you with your main? (prove it!) http://www.speedsolving.com/forum/showthread.php?42529-How-much-better-are-you-with-your-main-(prove-it!)&goto=newpost Mon, 17 Jun 2013 22:40:56 GMT I was curious whether my main (Zhanchi) was actually faster than other cubes. In fact, it seems like every week I change my mind about what my... I was curious whether my main (Zhanchi) was actually faster than other cubes. In fact, it seems like every week I change my mind about what my favorite cube is. In order to prove it, I took an average of 20 for each cube and these were the results:

Cube Average St. Dev. S_pooled T_exp T_99.9% T_75% T_25%
Zhanchi 16.70 1.01 1.57 3.622 3.566 1.168 0.321
Lunhui 16.71 1.02 1.47 1.311
MoYu 16.85 1.89 1.52 0.313
Guhong 17.31 1.82
SS Wind 18.50 1.98

Sure enough, it seems like there is no real difference between my top 3 (maybe even 4) favorite cubes, other than I seem to be less consistent with the MoYu and Guhong. Hmmm.

After performing a paired t test, I found with over 99.5% certainty that there is a difference between my times with Zhanchi and ShengShou. Also I can say with over 75% confidence that my Zhanchi is better than my Guhong. (with more trials I could increase certainty.) Finally, and most interestingly, I can be at least 75% confident that there is NO difference between my performance with Zhanchi and with MoYu.

These calculations are really easy to perform in excel. If you want to know how to do it I show how below:
Spoiler:

First put your averages in column B and corresponding deviations in column C (if you want them in order, you can highlight all values and right click, then tell excel to "sort: low to high," then select the "expand current selection" option).

Then you must pool the variances between the two cubes you wish to compare. Say you are comparing the cubes in rows 2 and 3. This is done by using the following equation:

S_pooled = sqrt((( #trials_A - 1 ) * S_A + ( #trials_B - 1 ) * S_B )/( #trials_A + #trials_B - 2 ))

If you are doing 20 trials like I did you can type it in excel like so:

=SQRT((19*C2^2+19*C3^2)/38)

Then you must calculate a t value with:

T_exp = abs(average_A - average_B)/(S_pooled * sqrt(1/#trials_A + 1/#trials_B))

=ABS(B2-B3)/(E2*SQRT(1/10))

Then compare it to the corresponding value in a t table or type into excel:

=TINV(0.001,38)

Where the first number is 1 - p_value (99.9% confidence shown above) and the second number is degrees of freedom (#trials_A + #trials_B - 2)

If T_exp > T_table, you reject the null hypothesis (the values are different). Otherwise, your cubes show no statistical difference at the corresponding level of confidence.


This experiment is fun to try and prove which cube(s) are really best for you. For me at least, it was also an exploration on how little hardware can actually effect your times

What cubes are your fastest? Are they significantly different? Which cubes surprised you when you discovered how good or how bad you are with them? ]]> General Puzzle Discussion immortalchaos29 http://www.speedsolving.com/forum/showthread.php?42529-How-much-better-are-you-with-your-main-(prove-it!) Speedcubing gear I should get http://www.speedsolving.com/forum/showthread.php?42513-Speedcubing-gear-I-should-get&goto=newpost Mon, 17 Jun 2013 15:56:17 GMT I'm going to buy a zhanchi from amazon and I thought I would by some extra "gear" at the same time, for example I've heard that the zhanchi doesn't come lubed so what lube would you suggest? Basically recommend what I should buy with the zhanchi ]]> General Puzzle Discussion Miekki http://www.speedsolving.com/forum/showthread.php?42513-Speedcubing-gear-I-should-get <![CDATA[Did you start on a Rubik's brand?]]> http://www.speedsolving.com/forum/showthread.php?42495-Did-you-start-on-a-Rubik-s-brand&goto=newpost Sun, 16 Jun 2013 16:06:22 GMT Hi!

Long story short, I started with cubing because I had a Rubik's brand, wanted to know how to solve it, found out how to solve it, found out about speedcubing at the same time, and ended up buying a speedcube.

Do you have a similar story?

speedcuber50 ]]> General Puzzle Discussion speedcuber50 http://www.speedsolving.com/forum/showthread.php?42495-Did-you-start-on-a-Rubik-s-brand Adjustable V-Cube 5 http://www.speedsolving.com/forum/showthread.php?42472-Adjustable-V-Cube-5&goto=newpost Fri, 14 Jun 2013 21:44:36 GMT Okay, so I just got a vcube 5, It is so tight that I cant barely turn it! I tried MMAP mod for adjustable core, we went to home depot and got... Okay, so I just got a vcube 5, It is so tight that I cant barely turn it! I tried MMAP mod for adjustable core, we went to home depot and got everything. I put the soldering iron on the center thing, And it detroyed the plastic, I need to get another core and center peices, Can I put a Shengshou, Lan Lan, YJ or QJ 5x5 middle part into it? Will it work? ]]> General Puzzle Discussion SnipeCube http://www.speedsolving.com/forum/showthread.php?42472-Adjustable-V-Cube-5 PBL Time Attack + Ranking http://www.speedsolving.com/forum/showthread.php?42467-PBL-Time-Attack-Ranking&goto=newpost Fri, 14 Jun 2013 18:20:11 GMT Just as any other rankings, you do all 5 PBL cases for 2x2 (ortega) and write your time. I will make a ranking list. Move cancellations NOT ALLOWED ... Just as any other rankings, you do all 5 PBL cases for 2x2 (ortega) and write your time. I will make a ranking list. Move cancellations NOT ALLOWED


Rankings:

Username: 4.40 ]]> General Puzzle Discussion Username http://www.speedsolving.com/forum/showthread.php?42467-PBL-Time-Attack-Ranking 3 PLL Challenge http://www.speedsolving.com/forum/showthread.php?42453-3-PLL-Challenge&goto=newpost Thu, 13 Jun 2013 17:21:35 GMT Image: http://i1276.photobucket.com/albums/y468/nuclearbigdaddy/3PLLCHAL_zps56a9abda.png My challenge is for someone to beat my time my time of...


My challenge is for someone to beat my time my time of 3.37 on this 3 PLL Challenge!
Come on, give it a try!

I also suggest you try these challenges one handed! Maybe you could be Antoine Cantin's OH time of 4.63.

COMMUNITY 3 PLL CHALLENGE

After some thought and suggestions, I have decided to ask the community for their favorite 3 PLL sets! Post some of your favorite, fastest, hardest, or most interesting 3 PLL algorithm sets!

MAIN CHALLENGES

MAIN CHALLENGE 1

First do a J (b) perm ([R U R' F'] {[R U R' U'] [R' F] [R2 U' R'] U'})
Then right after that do a T Perm ([R U R' U'] [R' F] [R2 U' R'] U' [R U R' F'])
Then finally do a U (b) perm ([R U'] [R U] [R U] [R U'] R' U' R2)
The PLL algs I have included are the ones I used to achieve this time!

Try to beat Antoine Cantin's time of 2.57 seconds!

Make sure to also try Mini Challenge 2!


MAIN CHALLENGE 2(Suggested by Sneaklyfox)

Try to get a sub 2 time with your 3 fastest PLLs! I don't know if this is possible but I decided to try suggesting it!


MINI CHALLENGES

MINI CHALLENGE 1 (Suggested by mDIPalma)

This one is interesting. Try to get a Sub-5 time by doing 2 N-Perms and a V-perm!


MINI CHALLENGE 2

Try to achieve a Sub-3 Average of 5 by doing Main Challenge 1!


HIGH SCORES

BOTH MAIN CHALLENGES
Oh noes! I am off the top 10 list!

1st: Antoine Cantin 2.57 (Oh my god x2!)
2nd: Przemek Kaleta 2.65 (Oh my god!)
3rd: Ottozing 2.668 (AWW...SO CLOSE!)
4th: Antoine Cantin 2.77 (Still very impressive!)
5th: stevecho816 2.82
6th: Username 2.99
7th Tao Yu 3.09
8th: Odder 3.11
9th: Kirjava 3.15
10th: uniacto 3.17



Nuclearbigdaddy (ME :p) 3.37 is 12th at the moment!

MINI CHALLENGE 1

1st: stevecho816 4.53
2nd: Antoine Cantin 4.93
3rd: Nuclearbigdaddy (ME :p) 5.02
4th: Przemek Kaleta 5.04
5th: Username 8.23
6th: mDIPalma 9.91
Attached Images
]]> General Puzzle Discussion nuclearbigdaddy http://www.speedsolving.com/forum/showthread.php?42453-3-PLL-Challenge Overseas DOD Cubers http://www.speedsolving.com/forum/showthread.php?42385-Overseas-DOD-Cubers&goto=newpost Fri, 07 Jun 2013 18:00:18 GMT So, I've been looking all over the forums and I can't find anything, so I will ask straight up. I was wondering if there any other cubers, like myself, whose parents are in the military and are currently living overseas. I don't know if there will be many responses to this thread, but I just wanted to know. I am originally from the U.S., but I currently live in Naples, Italy. ]]> General Puzzle Discussion Shortshrimp http://www.speedsolving.com/forum/showthread.php?42385-Overseas-DOD-Cubers The Realman Challenge + Ranking http://www.speedsolving.com/forum/showthread.php?42376-The-Realman-Challenge-Ranking&goto=newpost Fri, 07 Jun 2013 13:18:25 GMT I think you all know what this is. It is basically that you start the timer, scramble a cube using a scramble from any scrambler, solve it and then... I think you all know what this is. It is basically that you start the timer, scramble a cube using a scramble from any scrambler, solve it and then stop the timer. I'm gonna take it one step further with Different events :D Please post your times below, I will make a ranking :D

Events used: 2x2, 3x3, 4x4, 5x5, Pyraminx, Square 1, Clock, 3x3BLD, OH (SCRAMBLE OH TOO) + Any event you'd like

Use any scrambler you like

Rankings:

2x2:

stevecho816: 4.28
scottishcuber: 4.64
antoineccantin: 5.00
Coolster01: 5.28
Tao Yu: 5.45
muhammad jihan: 5.90
arcio1: 6.36
oranjules: 6.42
SweetSolver: 6.43
kclejeune: 6.51
Username: 6.70
qqwref: 7.51
SirWaffle: 8.40
FaLoL: 8.72
uniacto: 9.18
CuberCat: 11.31


3x3:

stevecho816: 12.48
5BLD: 13.11
muhammad jihan: 13.28
Speedmaster: 14.24
antoineccantin: 14.34
Tao Yu: 14.49
BigGreen: 14.51
XTowncuber: 14.62
qqwref: 15.95
oranjules: 16.41
Odder: 16.77
Ninja Storm: 17.84
kclejeune: 18.73
Iggy: 18.98
bran: 19.07
JianhanC: 19.23
Skullush: 19.57
MaeLSTRoM: 19.76
FaLoL: 19.88
arcio1: 20.39
Jaycee: 20.73
Username: 21.76
sneaklyfox: 22.27
uniacto: 22.27
SirWaffle: 23.43
KongShou: 29.30
TDM: 33.46
CuberCat: 34.89


4x4:

yoinneroid: 45.97
muhammad jihan: 48.10
BigGreen: 51.80
qqwref: 58.20
Speedmaster: 59.11
FaLoL: 1:04.44
MaeLSTRoM: 1:13.98
Username: 1:27.36
SirWaffle: 1:36.65
TDM: 2:26.83


5x5:

qqwref: 1:42.35
FaLoL: 1:53.82
Speedmaster: 2:04.70
JianhanC: 2:05.16
Username: 3:14.33


6x6:

qqwref: 3:31.42
FaLoL: 3:45.07


7x7:
qqwref: 5:05.69
FaLoL: 6:35.90


Pyraminx:

XTowncuber: 5.89
Odder: 6.00
oranjules: 6.17
Skullush: 7.72
Iggy: 8.59
sneaklyfox: 9.88
Username: 11.66
Jaycee: 12.38
SweetSolver: 12.66
FaLoL: 18.65


Square 1:

Cubinguy: 18.92
angham: 29.53
Skullush: 37.70
FaLoL: 1:09.22


Clock:

Iggy: 16.32
MaeLSTRoM: 34.09
Username: 42.38


3BLD:

Riley: 31.01
Ollie: 40.17
Iggy: 49.74


OH:

muhammad jihan: 17.62
antoineccantin: 23.05
qqwref: 23.39
Odder: 24.71
a small kitten: 24.83
Speedmaster: 31.13
JianhanC: 37.13
sneaklyfox: 42.75
Iggy: 46.56
FaLoL: 49.53
arcio1: 51.09
SirWaffle: 1:09.07
Username: 1:09.73
TDM: 2:15.47


Megaminx:

MaeLSTRoM: 1:11.28
Odder: 1:20.19
arcio1: 1:42.61
YddEd: 5:13.71


2x2-4x4 Relay:
FaLoL: 1:48.37


Feet:
Coolster01: 1:20.58


Feel free to do any other event, I'll add it to the list :)

Some rankings are not visible because there are no solves in the events yet ]]> General Puzzle Discussion Username http://www.speedsolving.com/forum/showthread.php?42376-The-Realman-Challenge-Ranking PLL time attack http://www.speedsolving.com/forum/showthread.php?42368-PLL-time-attack&goto=newpost Thu, 06 Jun 2013 18:06:57 GMT So I've been wondering when kind of time you people get on the PLL time attack. Please post your time in this thread.

Rules are you much do all 21 PLLs, in any order you like. Move cancellation is not allowed.

Ranking:
Antoine cantin 29.62
Snegcuber 30.88
Qqwref 34.71
Username 38.26
Emolover 39.12
Ben1996123 39 something
KongShou 41.27
Ronxu 44.08
Immortalchaos29 44.46
Sneaklyfox 46.53
PianoCube 46.98
A Leman 47.68
SirWaffle 57.35
JF1zl3 59.96
Mark49152 1:17
TheNextFeliks 1:21.68
Ross The Boss 5min ish ]]> General Puzzle Discussion KongShou http://www.speedsolving.com/forum/showthread.php?42368-PLL-time-attack Brand New V-Cube 7 For $35!! http://www.speedsolving.com/forum/showthread.php?42349-Brand-New-V-Cube-7-For-35!!&goto=newpost Wed, 05 Jun 2013 19:39:56 GMT Hey guys, Head on over to https://kids.barnesandnoble.com/kidsclub/ and sign up, get a 30% coupon. Barnes and noble now sells the Vcube 7 for $50, ... Hey guys, Head on over to https://kids.barnesandnoble.com/kidsclub/ and sign up, get a 30% coupon. Barnes and noble now sells the Vcube 7 for $50, My mom is a teacher so she gets an extra 20%, If you have the 30% than it will be $35, and if you have An education discount and the 30% it makes it $25! Thats the best price I have ever seen for a brand new vcube 7! ]]> General Puzzle Discussion SnipeCube http://www.speedsolving.com/forum/showthread.php?42349-Brand-New-V-Cube-7-For-35!! Believing in yourself... http://www.speedsolving.com/forum/showthread.php?42309-Believing-in-yourself&goto=newpost Mon, 03 Jun 2013 02:27:44 GMT Do any of you guys believe you can be a world class rubix cuber...? Aka top 20 in the world? Just an interesting question. Do any of you guys believe you can be a world class rubix cuber...? Aka top 20 in the world?

Just an interesting question. ]]> General Puzzle Discussion Jorghi http://www.speedsolving.com/forum/showthread.php?42309-Believing-in-yourself Live Cubecast And/Or Video Feed at Worlds 2013 http://www.speedsolving.com/forum/showthread.php?42271-Live-Cubecast-And-Or-Video-Feed-at-Worlds-2013&goto=newpost Sat, 01 Jun 2013 14:21:25 GMT Hi everyone,

As you probably know, me and Austin have been doing the newest episodes of Cubecast, and we're thinking about getting some live stuff done at worlds. Now we have 2 ideas about this, and each one could work separately, or together, hence the poll with the options on what you would like to see most.

The first thing is that we would like to have live video feeds set up so that people can watch what is going on. Ideally they would be placed one for each competing area, so that people can watch any event that is currently happening.
The second is that between rounds of events, or when people are free, doing interviews with various cubers, possibly on video, possibly as a voice over on the live feed. We'd hope to talk to quite a few people including current and past world record holders, and also people who are prominent in the community or just people that we want to talk to ;). Due to the fact that people would be competing quite a bit, we would probably have some alternate hosts as well, just to keep things moving during popular events.

The main problem we have is that we have no way to really set all this up without help, so this post has 2 purposes.

First of all, we would like to gauge the interest in us doing this kind of thing.

Secondly, this is a call to anyone who has the equipment/know-how to help us set it up and run it on the day. If someone is already planning stuff like this, we'd really appreciate it if you choose to include us. ]]> General Puzzle Discussion MaeLSTRoM http://www.speedsolving.com/forum/showthread.php?42271-Live-Cubecast-And-Or-Video-Feed-at-Worlds-2013 <![CDATA[Weird mis-scramble of Feliks's 5.66]]> http://www.speedsolving.com/forum/showthread.php?42270-Weird-mis-scramble-of-Feliks-s-5-66&goto=newpost Sat, 01 Jun 2013 14:12:27 GMT I decided to look at the reconstruction for Felix's 5.66 record. First time through went fine and it started with 3 cross pieces already solved. Nice place to start a potential record!

On my second go, I must have mis-scrambled because the whole cross was already solved, just misaligned with the middle layer. This is not so weird in itself (just unlikely) but the entire F2L consisted of easy cases then I got a LL skip. I think the entire solve was under 16 moves and I may have accidentally solved one F2L pair whilst setting up another. This solve felt REALLY weird... cross skip, super-easy F2L and LL skip.

I've tried to reproduce the mis-scramble but I've had no luck. Perhaps someone who fancies a challenge can figure out the mis-scramble?

I took the scramble from http://www.speedsolving.com/forum/sh...-Zemdegs/page2 ]]> General Puzzle Discussion Logiqx http://www.speedsolving.com/forum/showthread.php?42270-Weird-mis-scramble-of-Feliks-s-5-66 <![CDATA[Guhong v2 > Zhanchi?]]> http://www.speedsolving.com/forum/showthread.php?42264-Guhong-v2-gt-Zhanchi&goto=newpost Fri, 31 May 2013 20:37:22 GMT My first DIY cube was a Zhanchi (black). I had it for like a year, and then I decided to buy a Guhong v2 (white). When I lubed and tensioned my... My first DIY cube was a Zhanchi (black). I had it for like a year, and then I decided to buy a Guhong v2 (white). When I lubed and tensioned my Guhong, it turned like crazy, and after I felt the Guhong, I picked up my Zhanchi and it felt like a snail (it was also lubed and tensioned the same way). It may sound stupid, but Im really worried about my Zhanchi xD

P.S. I lost 2 of my washers somehow, will it affect my cube in any way? ]]> General Puzzle Discussion danerulz http://www.speedsolving.com/forum/showthread.php?42264-Guhong-v2-gt-Zhanchi