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(由 Microsoft 翻译) 有许多方法可以解决魔方问题，但它们都涉及使用公式来移动方块。有些解决方案需要使用 50 多个难以学习的公式。以下是已故李恩泰先生发明的一套3个公式，这套公式很容易学习和记忆。请注意，需要很多动作，你不能解决这个难题非常快，但最终你将能够解决它。
基本概念是先解决角落，然后解决边缘问题。这是基于一个简单的观察，即单独移动中间行不会扰乱角落。
基本程序如下：
现在从公式 A 开始，该公式交换 3 个角块的位置：
（为了便于演示，上图所示结果从已解决的立方体开始）
A级方程式如下：
请注意，前 3 个步骤涉及去除上脸的右下角，其余步骤是将其放回原处。您还可以应用此公式的变体，该公式去除并放回上脸的左下角，以实现左上角、左下角和右下角块在下脸上的类似效果。
完成将底部面的角块移动到其正确位置（但不一定位于正确的方向）后，您可以应用公式 B 逆时针旋转方块：
B方程式如下：
请注意，前 3 个步骤涉及去除上脸的右下角，其余步骤是将其放回原处。如果应用此公式的变体，底部面部的左上、左下方和右下方块将顺时针旋转。
完成所有 8 个角后，您应该使用公式 C 处理边缘，该公式以逆时针方向交换边缘 3 个方块的位置：
C 方程式如下：
请注意，前 3 个步骤涉及移除中下方块，其余步骤是将其放回原处。您也可以应用此公式的变体，通过交换上图所示的左右旋转，顺时针方向交换方块的位置。
使用公式 C 时，有时您会遇到不正确的方块不在同一张脸上的情况，在这种情况下，在应用公式 C 之前，您需要执行额外的移动，将不正确的方块移动到同一张脸。
基本概念是先解决角落，然后解决边缘问题。这是基于一个简单的观察，即单独移动中间行不会扰乱角落。
基本程序如下：
- 将一张脸的四个角移动到其正确位置和正确方向（您不需要任何公式）
- 使用公式 A 将剩余的四个角移动到正确的位置，但不一定位于正确的方向
- 使用公式 B 将剩余的角块旋转到正确的方向。现在所有八个角落都应该是正确的
- 使用公式 C 将边缘移动到其正确位置
现在从公式 A 开始，该公式交换 3 个角块的位置：
（为了便于演示，上图所示结果从已解决的立方体开始）
A级方程式如下：
请注意，前 3 个步骤涉及去除上脸的右下角，其余步骤是将其放回原处。您还可以应用此公式的变体，该公式去除并放回上脸的左下角，以实现左上角、左下角和右下角块在下脸上的类似效果。
完成将底部面的角块移动到其正确位置（但不一定位于正确的方向）后，您可以应用公式 B 逆时针旋转方块：
B方程式如下：
请注意，前 3 个步骤涉及去除上脸的右下角，其余步骤是将其放回原处。如果应用此公式的变体，底部面部的左上、左下方和右下方块将顺时针旋转。
完成所有 8 个角后，您应该使用公式 C 处理边缘，该公式以逆时针方向交换边缘 3 个方块的位置：
C 方程式如下：
请注意，前 3 个步骤涉及移除中下方块，其余步骤是将其放回原处。您也可以应用此公式的变体，通过交换上图所示的左右旋转，顺时针方向交换方块的位置。
使用公式 C 时，有时您会遇到不正确的方块不在同一张脸上的情况，在这种情况下，在应用公式 C 之前，您需要执行额外的移动，将不正确的方块移动到同一张脸。
(原文) A Simple Set of Formulas for Magic Cube
There are many ways to solve Rubik's Cube, but they all involve the use of formulas to move the blocks. Some solutions require the use of more than 50 formulas which is rather difficult to learn. The following is a set of 3 formulas invented by late Mr. Ngai Shing Lee, and this set of formulas is easy to learn and remember. Note that a lot of moves is needed and you cannot solve the puzzle extremely quickly, but eventually you will be able to solve it.
The basic concept is to solve the corners first and then the edges. This is based on a simple observation that moving the middle rows alone will not disrupt the corners.
The basic procedure is as follows:
Now start with formula A, which swaps the positions of 3 corner blocks:
(For easy demonstration, the result shown above is starting with a solved cube)
Formula A goes as follows:
Note that the first 3 steps involve the removal of the lower right corner of the top face, and the remaining steps are to put it back. You can also apply a variation of this formula which removes and puts back the lower left corner of the top face to achieve a similar effect for the top left, bottom left and bottom right blocks on the bottom face.
After you have finished moving the corner blocks of the bottom face to their correct positions (but not necessarily in correct orientations), you can apply formula B to rotate the blocks counterclockwise:
Formula B goes as follows:
Note that the first 3 steps involve the removal of the lower right corner of the top face, and the remaining steps are to put it back. If you apply a variation of this formula, the top left, bottom left and bottom right blocks in the bottom face will be rotated clockwise.
After you have finished all the 8 corners, you should deal with the edges using formula C, which swaps the positions of 3 blocks on the edge in a counterclockwise direction:
Formula C goes as follows:
Note that the first 3 steps involve the removal of the lower middle block, and the remaining steps are to put it back. You can also apply a variation of this formula to swap the positions of the blocks in a clockwise direction by swapping the left and right rotations as shown above.
When using formula C, sometimes you will face a situation that the incorrect blocks are not on the same face, and in this case you will need to make extra moves to move the incorrect blocks to the same face before applying formula C.
There are many ways to solve Rubik's Cube, but they all involve the use of formulas to move the blocks. Some solutions require the use of more than 50 formulas which is rather difficult to learn. The following is a set of 3 formulas invented by late Mr. Ngai Shing Lee, and this set of formulas is easy to learn and remember. Note that a lot of moves is needed and you cannot solve the puzzle extremely quickly, but eventually you will be able to solve it.
The basic concept is to solve the corners first and then the edges. This is based on a simple observation that moving the middle rows alone will not disrupt the corners.
The basic procedure is as follows:
- Move the four corners of one face to their correct positions and correct orientations (you should not need any formulas for this)
- Use formula A to move the remaining four corners to their correct positions but not necessarily in correct orientations
- Use formula B to rotate the remaining corner blocks to their correct orientations. Now all eight corners should be correct
- Use formula C to move the edges to their correct positions
Now start with formula A, which swaps the positions of 3 corner blocks:
(For easy demonstration, the result shown above is starting with a solved cube)
Formula A goes as follows:
Note that the first 3 steps involve the removal of the lower right corner of the top face, and the remaining steps are to put it back. You can also apply a variation of this formula which removes and puts back the lower left corner of the top face to achieve a similar effect for the top left, bottom left and bottom right blocks on the bottom face.
After you have finished moving the corner blocks of the bottom face to their correct positions (but not necessarily in correct orientations), you can apply formula B to rotate the blocks counterclockwise:
Formula B goes as follows:
Note that the first 3 steps involve the removal of the lower right corner of the top face, and the remaining steps are to put it back. If you apply a variation of this formula, the top left, bottom left and bottom right blocks in the bottom face will be rotated clockwise.
After you have finished all the 8 corners, you should deal with the edges using formula C, which swaps the positions of 3 blocks on the edge in a counterclockwise direction:
Formula C goes as follows:
Note that the first 3 steps involve the removal of the lower middle block, and the remaining steps are to put it back. You can also apply a variation of this formula to swap the positions of the blocks in a clockwise direction by swapping the left and right rotations as shown above.
When using formula C, sometimes you will face a situation that the incorrect blocks are not on the same face, and in this case you will need to make extra moves to move the incorrect blocks to the same face before applying formula C.
作者 Novel Games
2008-01-10 15:50:51
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