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BGonline.org Forums
Nactation for White's 33 play – S rather than Z
Posted By: Taper_Mike In Response To: Nactation for White's 33 play (Nack Ballard)
Date: Friday, 17 June 2016, at 3:02 a.m.
Nack has the definition right—Z has one "far" component and three "down" components. Martin's play, however, belongs in the S family, where there are three "far" components and one "down" component.
Upper-case S:
Three "far" components: bar/22, 24/21, 21/18*
One "down" component: 13/10Lower-case S:
Three "far" components: bar/22, 24/21, 21/18*
One "down" component: 11/8Usually, the upper-case letter is awarded to the play that moves its blots and spares closest to the 6pt. In the outer board, however, Nactation prefers blot and spare destinations when they are farther from the 6pt. That way, the upper-case letter is more often assigned to the better backgammon play.
Mike
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