CPU puzzle is a cleverly designed puzzle in which the the objective is to put the eight rods evenly back into the block once they have been removed.  All but one of the eight rods contain notches that prevent them from moving freely into the block, except when placed in the right position. 
Original design of this puzzle was by Rocky Chiaro.  Designed as AB-L puzzle in 2004, and also known as the Magic Wands Puzzle.

• See at Puzzle Master