[Help Thread] FMC Discussion

[mycube]

https://www.worldcubeassociation.org/competitions/PSKubing2016/results/all#e333fm_f

Getting a 24 wasn't good enough to get on the podium
Also no DNFs.

This is totally correct, indeed it is the best results not on the podium:

Spoiler: Best results in fourth place, single

Here are only results listed for competitions with best of 1 or best of 2, no results with a mean (see second spoiler for results with mean)

[td]Single	Name	Competiton
1	24	Linus Fresz	PSKubing2016
2	26	Fritz Löhr	HessenOpen2016
2	26	Alexander Botz	HessenOpen2016
4	27	Vincent Sheu	WC2013
4	27	Jan Bentlage	FrankfurtCubeDays2015
4	27	Alexander Botz	FrankfurtCubeDays2015
7	28	Robert Yau	WelcomeThayCambridge2015
7	28	Carsten Matheus	N8W8Summer2016
7	28	Linus Fresz	GermanOpen2016
10	29	Sam Boyles	USNationals2010
10	29	Jan Bentlage	GermanNationals2015
10	29	Andreas Pohl	GermanNationals2015
10	29	Linus Fresz	BWOpen2013
10	29	Emanuel Rheinert	GermanOpen2015
10	29	Jan Bentlage	ErfurtOpen2015
16	30	Manuel Guse	GermanNationals2013
16	30	Moritz Karl	GermanNationals2013
16	30	Chester Lian	USNationals2012
16	30	Tim Reynolds	WC2011
16	30	Tommaso Raposio	ItalianChampionship2016
16	30	Justin Harder	USNationals2012
16	30	Edoardo Disarò	ItalianChampionship2016
23	31	Jan Bentlage	ZonhovenOpen2014
23	31	Laura Ohrndorf	GermanOpen2014
23	31	Linus Fresz	GermanNationals2014
23	31	Ivan Torgashov	MPEIOpen2014
23	31	Yu Nakajima (???)	USNationals2011
23	31	Tomoaki Okayama (????)	SaarlandOpen2012
23	31	Yuuki Kobayashi (????)	Tachikawa3x3Fest2014
23	31	Moritz Karl	FranconiaOpen2015
23	31	Lucas Garron	Euro2010
23	31	Dennis Loose	GermanOpen2013
23	31	Marcin Jakubowski	PolishNationals2013
23	31	Jan Bentlage	ZonhovenOpen2013
23	31	Jan Bentlage	FrankfurtCubeDays2016
23	31	Clément Gallet	MontpellierOpen2010
23	31	Lorenzo Vigani Poli	MontpellierOpen2011
23	31	Erik Akkersdijk	ZonhovenOpen2013
23	31	Matthew Sheerin	MacclesfieldOpen2016
40	32	Martin Zahradník	CzechOpen2013
40	32	Jan Bentlage	MunichOpen2014
40	32	Taku Yanai (???)	HokurikuEveOpen2013
40	32	Yu Nakajima (???)	TachikawaFest2013
40	32	Grzegorz ?uczyna	JuraOpen2012
40	32	Shuto Ueno (????)	WasedaBrainChallenge2015
40	32	Akihiro Ishida (????)	KantoOpen2014
40	32	Erik Johnson	USNationals2009
40	32	Jakub Kipa	WarsawCubeMasters2015
40	32	Wojciech Knott	WarsawCubeMasters2015
40	32	Cornelius Dieckmann	FranconiaWinter2015
40	32	Joël van Noort	CzechOpen2010
40	32	Frank Severinsen	CzechOpen2010
40	32	Olivier Polspoel	LyonOpen2011
40	32	Jakub Cabaj	LyonOpen2011
40	32	Clément Gallet	LyonOpen2011
40	32	Sébastien Auroux	BerlinSummerCubeDays2016
40	32	Piotr Tokarski	IIMasovianOpenPlock2016
40	32	Bence Barát	CzechOpen2010
40	32	Andrii Kompaniiets (?????? ??????????)	CowboysSummer2015
40	32	Péter Pozsgai	HungarianOpen2012
40	32	Krzysztof Kuncki	IIMasovianOpenPlock2016
62	33	Mitsuki Gunji (????)	JapanOpen2012
62	33	Jan Bentlage	DutchOpen2011
62	33	Shotaro Makisumi (?????)	BeneluxOpen2010
62	33	Jens Diewald	BeneluxOpen2010
62	33	François Courtès	GermanOpen2012
62	33	Manuel Guse	GermanOpen2012
62	33	Erik Akkersdijk	ZuneOpen2012
62	33	Jakub Cabaj	PolishNationals2012
62	33	Sébastien Auroux	BelgianOpen2010
62	33	Andrew Ricci	HarvardFall2012
62	33	Rowe Hessler	HarvardFall2012
62	33	Moritz Karl	MunichOpen2012
62	33	Anton Rostovikov	MPEIOpen2012
62	33	Moritz Karl	FrankfurtOpen2012
62	33	Antoine Perdereau	PuydeDomeOpen2012
62	33	Tim Reynolds	AachenSummer2012
62	33	Ralph Eikelenberg	N8W8Summer2012
62	33	Daniel Sheppard	DanishOpen2011
62	33	Arnaud van Galen	N8W8Summer2013
62	33	Barnabás Turi	HungarianNationals2015
62	33	Piotr Kózka	CzechOpen2011
62	33	Evan Brown	Indiana2014
62	33	Micha? Pleskowicz	PolishOpen2013
62	33	Laura Ohrndorf	HessenOpen2014
62	33	Ryan DeLine	Mishawaka3x3Day2016
62	33	Pablo Aguilar Dominguez	MadridOpen2013

[/td] [td]

[/td]

[td]
[/td]

[td]

A lot of German competitions in this ranking

Spoiler: Best results in fourth place, mean

[td]Single	Mean	Name	Competiton
1	24	2767	Marcel Peters	WC2015
2	26	2800	Jan Bentlage	GermanNationals2016
2	23	2800	Marcel Peters	SebraOpen2016
2	22	2800	Kit Clement	Indiana2016
5	26	2833	Jan Bentlage	FMCEurope2016
6	26	2900	Wojciech Szatanowski	BONDOpen2016
6	28	2900	Walker Welch	USNationals2016
6	28	2900	Tomoaki Okayama (????)	CubeCampKanazawa2013
9	28	2933	Linus Fresz	Cubelonia2016
10	28	2967	Mats Valk	USNationals2014
10	27	2967	Yunke Zhang (???)	AsianChampionship2016
10	25	2967	Micha? Pleskowicz	PolishChampionship2015
10	27	2967	Mats Valk	AsianChampionship2016
14	30	3000	Ziheng Ma (???)	CrossstraitFMC2016
14	28	3000	Andreas Pohl	SebraOpen2015
14	28	3000	Qijun Miao (???)	FMCAsia2015
17	28	3033	Jeremy Fleischman	PleaseBeQuiet2015
17	30	3033	Rami Sbahi	Michigan2015
17	26	3033	Mat?j Grohmann	CzechOpen2015
20	27	3067	Rami Sbahi	FMCUSA2014
20	29	3067	Lucas Wesche	SebraOpen2014
20	27	3067	Ryan DeLine	KeepPortlandQuiet2016
20	28	3067	Piotr Kuchta	Euro2014
20	26	3067	Tim Reynolds	USNationals2015
20	28	3067	Brandon Harnish	FMCUSA2016
20	27	3067	Raymond Goslow	FMCUSA2015
27	28	3133	Rami Sbahi	Michigan2016
28	31	3167	Zijia Feng (???)	CubeofOddNumbers2016
29	29	3200	Minato Imai (???)	CubeCampinKanazawa2016
29	29	3200	Xingye Zhu (???)	ChinaChampionship2015
31	29	3267	Riley Woo	MentalBreakdown2016
31	29	3267	Andreas Pohl	BerlinOpen2013
31	29	3267	Julian David	Michigan2015
31	28	3267	Ping-Yueh Huang (???)	CrossstraitCubing2016
35	32	3300	Maarten Smit	EatSleepCubeRepeat2014
35	32	3300	Joshua Feran	BlindandWhatnot2016
35	24	3300	Andreas Pohl	ZonhovenOpen2015
38	26	3333	Zijian Chen (???)	CrossstraitFMC2014
38	25	3333	Cale Schoon	AnotherFMC2015
38	31	3333	Balázs Bernát	HungarianOpen2015
38	31	3333	Feihong Zhang (???)	CrossstraitFMC2016
38	29	3333	Nikita Loyko	BSTUOpen2015
43	31	3367	Piotr Kuchta	PolishOpen2015
43	32	3367	Timothy Sun	FantasticManhattan2016
43	30	3367	Hideki Niina (????)	CubeCampinKanazawa2015
43	30	3367	Bence János Csuti	BratislavaOpen2015
43	33	3367	Clément Gallet	DolmenOpen2012
48	29	3400	Marcin Stachura	GdanskRubiksCubeDay2015
48	33	3400	Liudi Sun (???)	XianNewYear2016
50	32	3433	Andrew Nathenson	MentalBreakdown2016
50	34	3433	Zhenyu Zhang (???)	HefeiOpen2015
50	29	3433	Artem Melikian (????? ???????)	CowboysFMCParty2016
50	34	3433	Hideki Niina (????)	CubeCampinKanazawa2014
50	32	3433	Laura Ohrndorf	TubingenOpen2016

[/td] [td]

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[td]

code: https://github.com/LinusFresz/python-WCA[/td][/td]

 

[Bubtore]

Hmmm, European Championships are not in there since no one was fourth.
(I was fifth with 28.33 )
So I guess there are surely other competition where this happened.

 

[mycube]

This is totally true what you are saying, Reto And quite tricky to realize a method to avoid this. Actually there are 2 more competitions where this happened:

Euro2016
FMCEurope2015
MoratallaOpenRubik2014

This is only for means, for singles there are ~100 competitions with > 3 people in the top3 for a round (well.. more than one person in third place). To be honest I am a bit too lazy to implement this into my script, so I hope this information is enough for you

 

[Cale S]

second time I've used this kind of cancellation to go from 28 to 25

German comp spoilers

Spoiler

R' U' F D U' B2 D L2 U' R2 B' L D' R D2 B2 D' B' U2 F D2 U2 R' U' F

(U2 F' L') // 1x2x3
D2 F' U L' U2 // 2x2x3
D' R B' D' B F D F' // F2L
(D2 B2 U' B D' B' U B2 D' B' D2 B) // ZBLL

D2 F' U L' U2 D' R [B' D' B F D F' B' D2 B] D B2 U' B D B' U B2 D2 L F U2
replace moves in brackets with B' D B F D' F'

Solution: D2 F' U L' U2 D' R B' D B F D' F' D B2 U' B D B' U B2 D2 L F U2

 

[bubbagrub]

second time I've used this kind of cancellation to go from 28 to 25

German comp spoilers

Spoiler

R' U' F D U' B2 D L2 U' R2 B' L D' R D2 B2 D' B' U2 F D2 U2 R' U' F

(U2 F' L') // 1x2x3
D2 F' U L' U2 // 2x2x3
D' R B' D' B F D F' // F2L
(D2 B2 U' B D' B' U B2 D' B' D2 B) // ZBLL

D2 F' U L' U2 D' R [B' D' B F D F' B' D2 B] D B2 U' B D B' U B2 D2 L F U2
replace moves in brackets with B' D B F D' F'

Solution: D2 F' U L' U2 D' R B' D B F D' F' D B2 U' B D B' U B2 D2 L F U2

How on earth do you find that kind of thing...?

 

[RhysC]

How on earth do you find that kind of thing...?

I'm pretty sure he just thought that that section of his skeleton looked just like a bunch of triggers and decided to randomly reverse it, giving him a really easy case

 

[Cale S]

I'm pretty sure he just thought that that section of his skeleton looked just like a bunch of triggers and decided to randomly reverse it, giving him a really easy case

That's how I found it the first time, this time I had done it before and thought it would also work

 

[bubbagrub]

That's how I found it the first time, this time I had done it before and thought it would also work

I'm being dense, but I don't get how it worked -- could you explain what you did there?

 

[Cale S]

I'm being dense, but I don't get how it worked -- could you explain what you did there?

If you do those moves on a solved cube, it's very easy to see the 6 move solution

 

[Parham Saeednia]

My soloution for weekly FMC:

Spoiler

scramble:F R' D' F' U' B F2 L B2 D F' U R2 D L' R B R B L
On inverse scramble

R F2//Pseudo 2x2x2
B2 R' B' D' B' D2//Square
B' R' B R' D' U R' U'//Psuedo F2L-1
R' F2 U F U'//F2l-1+EO
R2 U' R U R' U' R2 U R2//Finish

Final solution: R2 U' R2 U R U' R' U R2 U F' U' F2 R U R U' D R B' R B D2 B D B R B2 F2 R'
30 HTM

 

[bubbagrub]

If you do those moves on a solved cube, it's very easy to see the 6 move solution

OK -- makes sense. And you found that by noticing that it was a set of triggers?

 

[Cale S]

this solution was kind of crazy, from the /r/cubers weekly competition

R' U' F U' F2 D R2 U2 B2 D2 R F' R2 B2 R D F' R2 B2 U F R' U' F

Spoiler

U' R' // square + 2 pairs
D' R D L2 U2 // 3c6e

lolskeleton: U' R' D' ^ R D L2 @ U2
@ = L D U' % F2 U D' L
^ = [E', R U R']
% = [D' L2 D, R2]

Solution: U' R' U' B U B' D' U R U' D L' U' L2 D R2 D' L2 D R2 F2 U D' L U2

25 moves

7 moves to just 3 comms lol

within a few minutes I found 17 to good L6C which resulted in a 28, then I tried this and wrote down the solution with less than a minute left. I used so many stickers for this...

 

[porkynator]

My solutions from PoliMi Open 2016.

Spoiler: NR Mo3 26.33

Spoiler: First Solve: 28 HTM

Scramble: R' U' F D' R2 B2 U B2 F2 R2 F2 D2 L' F' U' R' B' R2 D F' R B2 R' U2 R' U' F
Solution: R2 D B' D' B D R F2 R' B' R F2 R' D' B2 D2 L B2 L' F' L B2 L' U' R2 L' B D2

On inverse
D2 B' L //EO (3/3)
R2 U * F D2 //2x2x2 + 2 squares (4/7)
B2 D + B D' B' D B D' R2 //All but 5 corners (9/16)

* = L B2 L' F L B2 L' F'
+ = R F2 R' B R F2 R' B'

Great start, but poor continuation and bad insertions.

Spoiler: Second Solve: 25 HTM

Scramble: R' U' F U2 F2 D' F2 U' R2 B2 D' B2 F' R U B' D2 L2 U B L2 F2 U R' U' F
Solution: B2 R2 L B F' D B' D' F D' L' F L F2 L' F' L F L U' F R U' B D

NISS solve
B2 R2 //Square and 2 pairs (2/2)
(D' B' U R') //Expand to 3x2x1, more pairs (4/6)
L B D B' D2 //2x2x2 (5/11)
(F' U) //Another square (2/13)
L F L F2 L' F' L F L //All but 3 corners (9/22)

Skeleton: B2 R2 L B * D B' D2 L' F L F2 L' F' L F L U' F R U' B D
* = F' D B' D' F D B D'

Spoiler: Third Solve: 26 HTM

Scramble: R' U' F D2 B2 L2 F L2 U2 R2 F U R B2 D' R F U2 B L D' F' R' U' F
Solution: U2 L D U R L2 B L F L B' L F' L2 F D' L' D L D F' D' F' L' F2 U2

U2 L D U R //2x2x2 + pairs (5/5)
(U2 F2 L F) //XXcross + pairs ready on normal scramble (4/9)
L2 B L F L B' //F2L-1 + square (6/15)
L F' L2 //All but 3 pairs (3/18)
F D' L' D L D F' D' //Finish (8/26)

Another very good start was
L U' D R //EO + Pairs (4/4)
With possibil continuation
B2 D F R2 B2
B U B2 R2 B U2 R2 //All but 3 corners and 3 edges in 15
But I couldn't find good insertions.

 

[Torch]

Here is my 27 move solution from the 3rd scramble of Athens Winter 2016. It's the third 27 I've gotten officially, and 27 is still my at-home PB too!

Scramble (Generated with Cube Explorer): B D2 L' D2 F R' U2 B2 R D' L2 F B' L2 F R2 F' R2

U2//Pair
(F D U2 F)//2x2x2
(L B L')//Pseudo 2x2x3 + 3 Pairs
(D2 R')//some more blocks
B2 R2 B'//F2L-1
F D2 F' D2 R' D R D'//L3C

Skeleton: U2 B2 R2 B' F D2 F' D2 R' D [1] R D' R D2 L B' L' F' U2 D' F'

[1]: [B', R F' R']

Solution: U2 B2 R2 B' F D2 F' D2 R' D B' R F' R' B R F D' R D2 L B' L' F' U2 D' F' (27)

 

[Jan Bentlage]

My solutions from PoliMi Open 2016.




Scramble: R' U' F D2 B2 L2 F L2 U2 R2 F U R B2 D' R F U2 B L D' F' R' U' F
Solution: U2 L D U R L2 B L F L B' L F' L2 F D' L' D L D F' D' F' L' F2 U2

U2 L D U R //2x2x2 + pairs (5/5)
(U2 F2 L F) //XXcross + pairs ready on normal scramble (4/9)
L2 B L F L B' //F2L-1 + square (6/15)
L F' L2 //All but 3 pairs (3/18)
F D' L' D L D F' D' //Finish (8/26)

[/SPOILER]

If you use D' F' L F D F' L F as block comm you can cancel 5 moves

U2 L D U R L2 B L F L B' L F' L2 D' F' L' F D (F' L F F' L' F2) U2 (21)

 

[porkynator]

If you use D' F' L F D F' L F as block comm you can cancel 5 moves

U2 L D U R L2 B L F L B' L F' L2 D' F' L' F D (F' L F F' L' F2) U2 (21)

I am always afraid I miss something when doing those pair 3-cycles... I can never remember that particular case, maybe because I didn't fully understand it. Now I see that it is like [D', B' U' B] for corners, but with wide moves [D', Bw' U' Bw].

So, my next goal is to beat the 24.67 average that I missed because of this.

 

[guysensei1]

Weekly FMC, 28

Spoiler

F' D' F U' B D2//2x2x2
U D R D' R2 F U' R2 F//F2L-1
R U' * B U B2 R' B R2//3C
*=U' B D2 B' U B D2 B'

Final: F' D' F U' B D2 U D R D' R2 F U' R2 F R U2 B D2 B' U B D2 U B2 R' B R2

 

[Parham Saeednia]

28 For Weekly FMC

Spoiler

Scramble:U' F B' R' D B2 U F' R L D B R' U2 L2 B2 D' U2 F D2
On inverse
Pre-scramble: U F2
2x2x2: D B2 L2 U2
F21-1: L2 D' L D' B
AB3C: L2 B' L B L2 D L' D' L' D L D'
Skeleton on normal: F2 U' D L' D' L D L D' L2 B' L' B L2 B' D L' D L2 U2 L2 + B2 D'
+: L2 B R B' L2 B R' B'

Final: F2 U' D L' D' L D L D' L2 B' L' B L2 B' D L' D L2 U2 B R B' L2 B R' B D'
(28 HTM)

 

[okayama]

My solutions from FMC Asia 2016.

1st scramble: R' U' F D L2 B2 U' F2 L2 F2 R2 U F2 D2 F' L' D2 B2 D' B L U' R' F' R' U' F
1st solution: U2 R2 L' U2 F2 D' R F' U F U' F2 D' B' D B D F2 U2 F' D' F U2 F' D2 F' R' D' (28 moves)

Spoiler

15 min backup solution.

2x2x2 block: U2 R2 L' U2
More square: F2 D' R F' U F U'
More square: F2
Pseudo F2L minus 1 slot: D'
All but 3 corners: B' D B D F * D F' R' D'

Insert at *: F U2 F' D' F U2 F' D

After Pseudo F2L minus 1 slot,

B R' U' B U B D B D

also leaves 3 corners in 22 moves, but it doesn't give a better solution.

2nd scramble: R' U' F L2 F2 D2 U2 F2 R' D2 F2 L' F' R' D' R B' F' L' B' D U B R' U' F
2nd solution: U2 L2 B R' F' R' U F2 D2 L' U L U' L' U' L U' L2 U2 L U L' U L U2 L' B' U B L' (30 moves)

Spoiler

30 min backup solution.
(Moves in brackets are on inverse)

1x2x2 block: U2 L2 B
1x2x3 block: R' F' R' U F2
2x2x3 block: D2
Pseudo F2L minus 1 slot: (L B' U' B L)
F2L minus 1 slot: L'
Finish F2L: U L U L'
LL: L U2 L' U' L U' L', L' U2 L U L' U L, U2
Correction: L' B' U B L'

Not so bad scramble, so I should have found a better solution for this scramble, but unfortunately I couldn't.

3rd scramble: R' U' F L2 B2 U2 L R2 U2 L' D2 B2 D' B' F2 L B' D L2 D2 F' L' U' R' U' F
3rd solution: D' B' U2 L2 D' L2 B L' D2 R' B' L B' U B' U R' U2 R U' R' U' F R' F' R F2 L (28 moves)

Spoiler

15 min backup solution.

Pre-scramble: F2 L

1st square: D'
2nd square: B' U2
3rd square: L2 D' L2 B L'
F2L minus 1 slot: D2 R' B' L B' U B' U R'
More square: U2 R U' R'
All: U' F R' F' R
Correction: F2 L

28, 30, 28 = 28.67 (got 3rd place)

The result of the two winners is 26.67, excellent, congrats! I hope we can see their solutions.

 

[Attila]

My solutions from FMC Asia 2016.

1st scramble: R' U' F D L2 B2 U' F2 L2 F2 R2 U F2 D2 F' L' D2 B2 D' B L U' R' F' R' U' F
1st solution: U2 R2 L' U2 F2 D' R F' U F U' F2 D' B' D B D F2 U2 F' D' F U2 F' D2 F' R' D' (28 moves)

Spoiler

15 min backup solution.

2x2x2 block: U2 R2 L' U2
More square: F2 D' R F' U F U'
More square: F2
Pseudo F2L minus 1 slot: D'
All but 3 corners: B' D B D F * D F' R' D'

Insert at *: F U2 F' D' F U2 F' D

After Pseudo F2L minus 1 slot,

B R' U' B U B D B D

also leaves 3 corners in 22 moves, but it doesn't give a better solution.

2nd scramble: R' U' F L2 F2 D2 U2 F2 R' D2 F2 L' F' R' D' R B' F' L' B' D U B R' U' F
2nd solution: U2 L2 B R' F' R' U F2 D2 L' U L U' L' U' L U' L2 U2 L U L' U L U2 L' B' U B L' (30 moves)

Spoiler

30 min backup solution.
(Moves in brackets are on inverse)

1x2x2 block: U2 L2 B
1x2x3 block: R' F' R' U F2
2x2x3 block: D2
Pseudo F2L minus 1 slot: (L B' U' B L)
F2L minus 1 slot: L'
Finish F2L: U L U L'
LL: L U2 L' U' L U' L', L' U2 L U L' U L, U2
Correction: L' B' U B L'

Not so bad scramble, so I should have found a better solution for this scramble, but unfortunately I couldn't.

3rd scramble: R' U' F L2 B2 U2 L R2 U2 L' D2 B2 D' B' F2 L B' D L2 D2 F' L' U' R' U' F
3rd solution: D' B' U2 L2 D' L2 B L' D2 R' B' L B' U B' U R' U2 R U' R' U' F R' F' R F2 L (28 moves)

Spoiler

15 min backup solution.

Pre-scramble: F2 L

1st square: D'
2nd square: B' U2
3rd square: L2 D' L2 B L'
F2L minus 1 slot: D2 R' B' L B' U B' U R'
More square: U2 R U' R'
All: U' F R' F' R
Correction: F2 L

28, 30, 28 = 28.67 (got 3rd place)

The result of the two winners is 26.67, excellent, congrats! I hope we can see their solutions.

I found this solutions for 1st scramble:

Spoiler

within 1 hr:

F2 U R2 U D’ L’ U’ F B’ D’ F B’ L B’ R2 B’ U D’ F2 U D’ 21 moves (17 STM)



F2 U R2 U D’ L’ U’ orient corners and 6 edges,

F B’ D’ F B’ L domino reduction,

B’ R2 B’ R2 U2 D2 to L3E,

D2 U2 R2 U D’ F2 U D’.

No time limit:

F2 U R2 U D’ L’ D’ L2 U D’ B’ F2 U2 F’ U2 D B F’ R’ 19 moves (16 STM)

F2 U R2 U D’ L’ U’ same as my first start,

(R F B’ D’ ) domino reduction,

switch back to normal sramble with premoves D B F’ R’,

F2 U R2 U D’ L’ D’ L2 U D’ /F2 U R2 U D’ L’ U’- U D’ L2 U D’/ inserted 3 edges-cycle,

B’ F2 U2 F’ U2 finish.