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BGonline.org Forums
Nactation of 32S-33B-32
Posted By: Nack Ballard In Response To: 32S-33B-32@-63? (6stones)
Date: Wednesday, 1 December 2010, at 12:19 a.m.
You asked about the Nactation of White's play of 24/21 13/11 in the left-hand position, resulting in the right-hand position.
32S-33B-32
White played 32S-33B-32S
My preference is S, for two reasons: (1) It describes the entire play (no need for assumption or supplemental convention), and (2) It is a repeat Nactation of White's previous (opening) 32S play.
Your use of @ (anchor) is fine, too. White anchors with the 3, and for the leftover part of the play, 13/11 obeys the most-points convention (which overrides the 6pt convention). I mainly changed the header of my other post in case someone later searches for the position by S.
Note: This modification is not yet spelled out in the tutorial, but for non-doublet usage, B moves the offensive part of the play WITHIN one's own outer board, whereas S or Z moves that portion of the play TO the outer board (from Opp's outer board -- usually the midpoint). This works out to be an excellent division of labor for the letters. Thus, in the position at hand:
B = 24/21 11/9
b = 21/18 11/9
S = 24/21 13/11
s = 21/18 13/11
Z = 24/22 13/10That said, if someone used B for the above play, under most circumstances I would likely assume that they mean 24/21 13/11 anyway and that they spaced out or don't (yet) know the B/S/Z nuance. In other words, for most situations Nactation is quite forgiving. OTOH, if you happen to be nactating a game between novices or for a puzzle solution, it is a good idea to be as precise as possible.
Nack
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