Daily F2L Discussion - Case 4

Case 4

Setup: R U' R'

Most important solution: R U R'

Angles: Easy from FR + BL. Harder from FL + BR.

Mirror: Case 3

Discussion: This is one of the four most fundamental cases (along with cases 1-3), as most F2L cases are solved by reduction to cases 1-4. Case 4 has a trivial 3-4 move solution. It can be handled easily from the FR and BL. From the other two angles, it's best to do a cube rotation and insert the pair into the back.

This is a right-handed version of case 3. For an in-depth discussion of flip cases, see yesterday's thread about case 3.

Algorithms

[Front Right (FR)](http://cube.crider.co.uk/visualcube.php?fmt=png&size=200&stage=f2l&case=R U R'.png)

R U R'

[Back Left (BL)](http://cube.crider.co.uk/visualcube.php?fmt=png&size=200&stage=f2l&case=y2R U R'.png)

L U L'

[Front Left (FL)](http://cube.crider.co.uk/visualcube.php?fmt=png&size=200&stage=f2l&case=y'R U R'.png)

y + {BL}

y' + {FR}

F U F'

[Back right (BR)](http://cube.crider.co.uk/visualcube.php?fmt=png&size=200&stage=f2l&case=yR U R'.png)

y' + {BL}

y + {FR}

Previous Daily F2L Discussions

1 2 3 [4] (https://www.reddit.com/r/Cubers/comments/42esto/daily_f2l_discussion_case_4/)

Stay tuned for tomorrow's case, in which things actually become interesting =)