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| XGID=-a----EaC---dEa--c-e----B-:0:0:1:32:0:0:3:0:10 | |||||
62S-32 | |||||
After 62S, 32 played 13/10 6/4 would be $, but what would the Nactation be for a reverse slot 13/11 8/5?
Good question; you've tapped into an unusually tricky situation.
(By the way, for Nactation, it is better to avoid the term "reverse slot.")
The short answer is that 13/11 8/5 is "$" or "o", while 13/10 6/4 (the alternate slot) is "%" or "N".
Please review Section 7 ("Symbols") of the Nactation tutorial. Page 27 covers $ (Slot) and page 28 covers % (alt slot) -- just to the right of $ on the keyboard. The double-slot symbol (&) is also explained.
[It is possible you are recalling an older version of the tutorial. Five years ago, I simplified the slot rules, which gained overall but had a few best-early-play casualties: it happened to toggle 32$ to 13/11 8/5 (and 32% to 13/10 6/4).]
Symbols ($ and @ being the most common) and style letters (H, K, and P being the most common) are usually clear, but if you encounter a situation where it is not obvious to you whether to use the primary case (such as $ or H) or the secondary case (such as % or h), you can:
(b) Use an areal letter. Most areal letters are introduced even earlier in the tutorial, but for a full encapsulation, see Section 5 (starting on p. 14). And/or
(c) Use assumptive Nactation: Add a DOT (period) after your character, which indicates you mean the most obvious or natural move that has a slot component. Strictly speaking, the plus-dot method is ambiguous (and lazy, if applied too loosely), but IF your move is the clearly best of its type, this is a fine option.
Let's start with (a); for clarity check out page 85. 13/11 8/5 or 13/10 6/4 ends up with the same number of points -- so far it's a tie. That tie is broken when you look at which point is slotted. The 5pt is closer (than the 4pt is) to the 6pt, so 13/11 8/5 is $, and 13/10 6/4 is %.
Before moving on, I'll elucidate the O (Outer) family. "O" is one of the six BEACON letters introduced for doublets on pages 9-11, and for non-doublets on pages 12-14. Half of the move is played into (or within) a player’s Outer board and the other half is played out of his Outer board.
Your second viable option, therefore, is (b). Use the "O" (Outer) family and apply the "hit-more-6" rule on page 47 (used for all areal families). Neither play hits, and both plays retain the same number of points. The tie-breaker is that the 6pt is closer (than the 5pt) is to the 6pt -- you can't get any closer! Therefore, O = 13/10 8/6, and o = 13/11 8/5.
Finally, there's option (c): You can combine the O family with the use of the assumptive dot. "O." is interpreted as 13/11 8/5, the "clearly" strongest backgammon play in the O family. [For Nactation mavens: You cannot use the assumptive dot if it's one of the OCEAN letters for doublets. Those have a special meaning, as explained on pages 103-105.]
[In a similar vein, "62S-32$." (note the dot) would refer to 13/10 6/4, assuming you have a strong audience. There are clearer examples of applying a dot, but it should be obvious to a good player that 13/10 6/4 is the best slotting play due to the superior distribution.]
Finally, an instructive use of the hit-more-6 rule appears on page 13 (going from diagram 16 to 16.1). See if you can figure out why "O" is used there for 13/11 8/5 rather than lower-case "o".
Nack