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Step 3:
How To Solve Second Layer
Until this point we could work intuitively without any algorithm to memorize, but in this stage when we're solving the second layer of the Rubik's Cube. People usually get stuck because there are too many moves to foresee in order to complete this step. You'll have to learn two algorithms which bring the edge piece from the yellow layer to the second layer without messing up the white face already solved. Until this point we held the cube with the white center facing up, now turn it upside down to let you review the puzzle better.
The Right and Left algorithms
Right Algorithm:
U R U' R' U' F' U F
Left Algorithm:
U' L' U L U F U' F'
Wrong Orientation
Use the Right Algorithm to bring the piece to the top layer.
Note: You have to just put those pieces in second layer which do not have yellow colour
(if you are starting with any other colour exept white then you have to take careto not to insert that piece which
opposite to that colour. like if i start with blue then i have to not to insert piece which is opposite to blue i.e. green)
Note: You could face a situation where the piece is inserted correctly but it is fliped (wrong orientation). So don't panic. you have to just take it out and re-insert it into its correct position and with
its correct orientation.
To take a piece out you have to just apply the algorithm depending wheather it is in your left side or right.(use left or right algorithm)