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When are inverse and mirror algorithms used? Also, if I use F2L, 2 look OLL and 2 look PLL, how fast roughly can I get my solve before I start learning full OLL and PLL? THanks

When you run into a case from a different angle.


You can get sub 20, but sub 30 would be a good goal before learning full PLL. At around 20 seconds average, learn full OLL.
Thanks for the info, I've learnt the two look OLL and PLL algorithms and am halfway through learning the f2l ones, could you please suggest a scenario where an inverse or mirror algorithm would be used, thanks.

You know how you do a U permutation with the 3 block in the back? Well, if you ended up with the 3 block in front, you'd have to auf, or do a y2 rotation. Instead you could use the mirror, and fix the u perm from where you are.

That's not a mirror...

Ooh that's helpful. Then why don't you tell us what it is.
 
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You know how you do a U permutation with the 3 block in the back? Well, if you ended up with the 3 block in front, you'd have to auf, or do a y2 rotation. Instead you could use the mirror, and fix the u perm from where you are.

That's not a mirror...

Ooh that's helpful. Then why don't you tell us what it is.[/QUOTE]

That would be a reflection across the FB plane.

http://www.speedcubing.com/chris/algconversion.html
 
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