关于变化数:(摘自网络)
There are 10 pieces which might be arranged in 10! ways, and they each have 12 possible orientations. This gives a maximum of 10!•1210 positions. This limit is not reached because:
The pieces must have an even permutation (2)
The facelets must have an even permutation. (2)
The orientation of the puzzle doesn't matter (12)
This leaves 10!•1210 / 48 = 4,680,952,735,334,400 positions.
It should also be noted that there are actually 2•45 = 2048 solved positions, because the 6 middle pieces each have 4 ways they can be placed correctly, but they are restricted slightly by the second condition above.
前面几段不用看,只用看最后一段,说明这款puzzle实际上有2048种还原状态。