So, I decided to learn twosided PLL recognition, just for the fun of it. It looked pretty complicated at first, but it turned out to be much easier than I expected. When trying to recognize from two sides, you see six stickers in a row. There are only 35 patterns for these stickers, and each pattern indicates a unique PLL. Most of the patterns are easy to recognize and remember.
I found several resources to help learn twosided PLL recognition, but all of them seemed to make it overcomplicated. I just wanted a simple quickreference guide for the 35 possible patterns  show me each pattern, and tell me which PLL it is. So I made the attached. I hope someone else out there finds it useful, and would welcome any feedback to help improve it.
pll2side20140531.pdf
For practice, I recommend the random button in RiDo's playtool. Scroll until the answer is off the top of the window, to make it harder
Why bother? Well I'm not fast and it's not like avoiding looking at a third side is going to save me that 0.2s that gets me a WR. But it did occur to me that checking around the cube for the usual headlights and bars to confirm my PLL case is kinda lazy when they can be recognized more quickly with a just bit of practice. I often still look at the 3rd and even 4th sides to confirm the case, but by then I know what case to expect and am already AUFing when I check the other sides. So it's definitely reduced my prePLL pause, and, well... is there any reason not to?
EDIT: Guide updated on 2 June 2014 with easier recognition for some of the patterns, plus adding links to other resources below.
Here are links to some resources I found useful while learning twosided recognition:
I found several resources to help learn twosided PLL recognition, but all of them seemed to make it overcomplicated. I just wanted a simple quickreference guide for the 35 possible patterns  show me each pattern, and tell me which PLL it is. So I made the attached. I hope someone else out there finds it useful, and would welcome any feedback to help improve it.
pll2side20140531.pdf
For practice, I recommend the random button in RiDo's playtool. Scroll until the answer is off the top of the window, to make it harder
Why bother? Well I'm not fast and it's not like avoiding looking at a third side is going to save me that 0.2s that gets me a WR. But it did occur to me that checking around the cube for the usual headlights and bars to confirm my PLL case is kinda lazy when they can be recognized more quickly with a just bit of practice. I often still look at the 3rd and even 4th sides to confirm the case, but by then I know what case to expect and am already AUFing when I check the other sides. So it's definitely reduced my prePLL pause, and, well... is there any reason not to?
EDIT: Guide updated on 2 June 2014 with easier recognition for some of the patterns, plus adding links to other resources below.
Here are links to some resources I found useful while learning twosided recognition:
 Sa967st's guide  good explanation and some good ideas.
 jskyler91's videos part 1 & part 2  basically a video walkthrough of Sa967st's guide.
 Andy Klise's guide  reference sheet organised by PLL case rather than by side view
 Lucas Garron's method  based on memorizing syllable sequences.
 Parity Case's guide  very long and detailed.
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