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Nactation: A, N and O

Posted By: Nack Ballard
Date: Wednesday, 5 October 2011, at 7:53 p.m.

In Response To: Nactate this (Timothy Chow)


1O1O ' ' '5X '3X ' '1X4O

1X ' ' ' '5O1X3O ' '1O4X

21S-62S-44


Why doesn't N denote 11/7* 8/4 6/2(2)? It hits, keeps the most points, and for the last 4, puts a checker closest to the 6pt (the 4pt is closer to the 6pt than the 9pt is).

Are you assuming that N couldn't possibly denote such a bad play?

No assumption is being made about quality of play. The Nactations of my previous post are purely mechanical (strict/proper usage).

Half of an N play is to or within the outer board ("down"); the other half is entirely within the inner board ("inside"). In the case of doublets, which has four move portions, this means two "downs" and two "insides."

8/4 is neither a down nor an inside. It is a "jump." An N play cannot include any portion that jumps over the bar (such as 8/4), from outer board to inner board.

In the same way that 33N = 13/10(2), 44N = 13/9(2) 6/2(2) as a simple opening reply. As Stick and David correctly identified, because a hit is possible in the 21S-62S-44 position (diagrammed above), "N" becomes 11/7* 13/9 6/2(2), and "n" is relegated to 13/9(2) 6/2(2). Note the familial similarity the two plays have to each other.

This post reviews A, N and O. For additional clarity, in the "Proper usage" section, practice implementing the detailed breakdowns of 0011, 0202, and 0220.

Nack

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