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Nactation Question

Posted By: Nack Ballard
Date: Sunday, 20 November 2011, at 11:49 p.m.

In Response To: Nactation Question (Taper_Mike)


1O ' ' ' '5X2X3X ' ' '4O

' ' ' ' '5O2X3O1O ' '3X

64S-66B-22


I agree with Mike that: Mochy correctly nactated all nine of the complex doublet plays except for his uncertainty about two members of the B family. As Mike explained, owned point (closest to 6pt) is considered first, then blot destination (closest to 6pt) in any quadrant other than the outer board. Hence

    B = bar/21 13/9
    b = bar/23 24/22 13/9
    B = bar/21 13/11(2)
    b = bar/23 24/22 13/11(2)

In short, the 9pt beats the 11pt, and the 21pt beats the 22pt. As experienced nactators can attest, it is not just by luck that the backgammon quality of the four plays are ranked the same as the family hierarchal ranking: B, b, B, b.

Nack

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