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Naccel 2 -- post #3

Posted By: Ian Shaw
Date: Monday, 11 January 2010, at 7:48 p.m.

In Response To: Naccel 2 -- post #3 (Nack Ballard)

The Mirror Pattern is very useful. In fact, I realise that all the Mirror positions are simply utilising the symmetry about the S1 (opponent's midpoint). In Jim's example I'd spotted this symmetry for the 11 and 13 points, but it's a really useful tip that the staggered opposites apply all the way doen the board.

Could you clarify the Symmetry in White's inner board, please? You seem to use the 1st man on the six point as part of the symmetrical pattern, while at the same time saying it counts zero because it's on S0. I can't see how it logically can count zero and also be used as part of a cluster, which implicitly makes it a contributor to part of a non-zero count.

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