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| 43D-42P-43P-55P-61P-21 | |
Tim is correct that 24/23 24/22 is nactated "V," not "U." (That said, I appreciate the willingness to use Nactation, even with the inevitable missteps while learning it.)
In the Nactation tutorial, beginning of section 5 (segment "V"), there is a clarification of U and V usage, complete with diagrams. It's short but enlightening and memorable. Still, for those not interested in looking there, it culminates with this paragraph:
- Here is a reliable way to determine whether to use U or V: If there is only one possible up play with a roll, use U. If there are two possible up plays with the roll, the play that moves the leading checker closest to home is nactated U, and the other play is V.
The tutorial teaches not only Nactation. I select positions that illustrate early game plays that are not only correct but also often not well-known. For example, do you know the right play with 61P-11N-21? You'll find out if you click on the aforementioned tutorial and read the segment on V.
(Side note to Tim: It shouldn't matter in this case because it's hard to imagine anyone would make a play other than 13/3(2), but as 55D strictly means 13/8(4), I find preferable is 55P or 55O or even just 55.)
I am also reminded of the position pair diagrammed below:
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For the answers accompanied by detailed explanation, see Backgammon Openings, pages 72-73.
Nack: