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Fischer Random Chess. Play from a random setup. (8x8, Cells: 64) (Recognized!)[All Comments] [Add Comment or Rating]
Bevan Clouston wrote on Thu, Nov 25, 2010 05:43 AM UTC:
Re: Number of arrays for Fischer Random.

The way that you have had this calculated is strictly correct however it
was overlooked that a mirror image is actually the same position.

For example:
The position B B R K R N N Q is reasonably simply. It is the same to play
in every way as the position Q N N R K R B B.

Hence there are only 480 true variations ( 16 x 20 x 3 / 2 ). This is still
a lot to memorize. I wouldn't recommend trying.

BMunage