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''The Simple Solution to Rubik's Cube'' by James G. Nourse is a book that was published in 1981. The book explains how to solve the Rubik's Cube. Most of the solutions to Rubik's Cube that can be found on the internet today seem to be based at least in part on the solution in this book. The book's solution to the cube is considered to be one of the easiest, simplest, and most straightforward solutions to solving the cube. However, this ease and simpliciy involves a tradeoff in that this solution takes longer than other solutions that are harder and more complex.〔(A Comparison of Various Methods )〕 In his book, Nourse used a notation that is different from that of David Singmaster, which had not yet become widely known. Instead of being named Up and Down and represented in moves by U and D, the horizontal faces are named Top and Bottom and represented by T and B. To avoid the single-letter ambiguity, the rear face is called Posterior and represented by P. Additionally, clockwise and anticlockwise moves are indicated by + and -, respectively, instead of bare letters and primes. Thus, for example, Nourse gives the algorithm for rotating three corners of the bottom face anticlockwise (solving the position Lars Petrus named the "Sune") as follows: R- B- R+ B- R- B2 R+ B2 In Singmaster's notation, that same move sequence would be written thus: R' B' R B' R' B2 R B2 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「The Simple Solution to Rubik's Cube」の詳細全文を読む スポンサード リンク
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