| 166 | |
|---|---|
| |
| 63S-65K-66^-44 | 156 |
In answer to your Nactation questions/speculations about 24/20 13/1:
I like "m" best. Mayfair split simplistically means split, down and make an inside point. The broadened concept is: Far, outer, inner, inner (where outer is to or within, and inner prioritizes "within"). In this position, M = 24/20 13/9 6/2(2). Next, comes the plays that moves one or two portions to (instead of within), so "m" = 24/20 13/9/1, ahead of other "to" moves by most-points convention. (For reference, M = 24/20 13/5 8/4, and m = 24/20 13/9 8/4(2), ordered by 6pt convention.)
You suggested S. Not bad. 24/20 13/9 are pegged for two 4s. By usual conventions (most-point, then 6pt), the other two 4s are allocated: S = 13/9 8/4, s = 13/9 7/3, S = 13/9 6/2, and s = 9/1. But 9/1 is so much better than the slotting alternatives, that S can be justified on assumption. (Another justification is that a Nactation-fluent reader might reasonably deduce you'd use a member of the G family for 24/20 13/9(2) plus fourth 4 within/to inner board.) Btw, Z/z/Z/z works similarly; if these situations arose with more frequency I'd devise a way to divide the labor for S and Z.
You also mentioned 1 (for 1pt). This does indeed peg three of the 4s as 13/1. The fourth 4 is allocated: 1 = 8/4, 1 = 7/3, 1 = 13/9, 1 = 6/2, and in fifth place (by both conventions) is 1 = 24/20. So, as you can see, the 1 family is a poor choice for 13/1 24/20 (fifth member).
Finally, you asked about applying a member of the E family to 24/20 13/1. Not impossible but highly unwieldly. That letter (like B) is intended to convey half the move is played on each side of the board. All the 2:2 (touching inside, and far) candidates are exhausted before dipping down to plays like 24/20 13/1 that are divided 3:1. That strategy seems more conceivable for letters like O or N where portions can be divvied more locally (inner/outer 3:1 or 1:3).
Nack