Rubik's Cube, invented by Ernö Rubik in 1974, is a intelligent, fun game, that was the world's best-selling game of the twentieth century, and is still in vogue today.The original Rubik's Cube, or 3*3*3 Rubik, is a six-sided, six-color cube, cut by six slices, distributed on three axes of Oxyz coordinate system, yielding 27 (3*3*3) Rubik's pieces.There are many ways to solve the standard Rubik's Cube, this book uses the pRubik procedure to solve it. The pRubik procedure consists of 3 steps, using 9 formulas, each consisting of a number of simple rotation steps. Of these 9 formulas, there are 2 pairs with 4 dual formulas, and 2 similar formulas, so actually only 6 independent formulas, therefore it's easy to remember the procedure.The Standard Rubik has many standard variants which are variations on the pattern of Rubik's faces, on the Rubik's body shape, on distribution and direction of the cutting planes, on the shape of cutting surfaces, on the size of variants, and on the number of axes of variants. All of these standard variants can be solved using the pRubik procedure.This book sequentially shows how to solve 72 standard variants, including 36 simple variants and 36 complex variants. Simple variants, solved in [3], include: Void 1, Potato Chips, Convex Concave, Sandwich 1, Coloured Corner, Red Cap, House of Science, Cylinder, Octagonal Prism, Void 2, Ball, Ball in Cube, C-Virus, Anis Star, Twisted Cube, House 1, Mirror Cube, Colour Cube, Fisher, Windmill, Mirror Fisher, Mirror Windmill, Fluffy, Pandora, Sandwich 2, Rainbow 1, Rainbow 2, Cube 2*2*2, Mirror Cube 2*2*2, Window 2*2*2, Megaminx 2*2*2, House 2*2*2, Mouse 2*2*2, Buffalo 2*2*2, Elephant 2*2*2, Cat 2*2*2.Complex variants, solved in [4], include: Maze 1, Maze 2, Arrow, Shepherd, Dice, Blackpink, Chemistry, Math 1, Math 2, Number, Sudoku, Case, House 2, Penrose, Star, Egg, Heart, Orange, Peach, Lemon, Pear, Apple, Hexagonal Dipyramid, Hexagonal Diamond, Hexagonal UFO, 4-Corner, Mastermorphix, Axis, Mirror Axis, Crazy Fisher, Crazy Windmill, Ghost, Phoenix, Kilominx, Megaminx, Phoenix Megaminx

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