I think you're right, there's the 8 board symmetries and white/black symmetry, but the latter symmetry is broken since you need to know which player's turn it is.

Btw, the number of positions that must be considered is also multiplied by ko considerations.

--Luke Gustafson

I don't understand this ... isn't the number 8?

Cheers,
David



On 12, Oct 2006, at 11:38 AM, Don Dailey wrote:

1 canonical position per 16
equivalent states.  The actual number is less than 16.

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