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Intermediate version (was: New Paper on Opening Replies)

Posted By: nack ballard
Date: Sunday, 16 April 2017, at 7:53 p.m.

In Response To: Intermediate version (was: New Paper on Opening Replies) (Axel Reichert)

I applaud your efforts.

Forgive me if I missed out on earlier discussion, and I don't want to undermine work that others may be building on, but it seems to me that when canvasing "replies" (second-roll moves) it is important to define which moves you are going to allow for the "openers" first-roll moves. For example, you might include any opener that does not exceed a money error greater than .02:

.....P...31 42 61 53 64
.....R...65 64 63
.....S...64 63 62 54 52 51 43 41 32 21
.....Z...43 32
.....D...54 52 43 32
.....$....51 41 21

That's 27 openers. Personally, I would not include the larger errors of 62R and 62$ (good only at GG, and mimics 51$-xx anyway), and I would no longer include 43U (which pre-XG bots tolerated). If you've been playing many different places for several years and virtually never see 43S, 32Z or whatever for money or normal scores, consider eliminating some/all of those as well. But the point is: define your set, whatever it is.

Also, I think it's a mistake to use as lax a standard for openers as you would on replies. It's trivial, even for a beginner, to memorize openers within .02. In the case of my set above, the summary is simply:

.....P, 65R, S

... which means play any P if you can, else play 65R or any S.

I would also encourage you to add layers of strength. Here is one possible model:

.....No mark = within .06
.....(Parentheses = within .04)
.....[Brackets = within .02]
.....{Braces = perfect}

If you feel you must sometimes include even weaker plays, you could attach * (-.06 to -.08) and ** (-.08 to -.10) to individual entries.

(Alternatively, instead of different brackets, you could use various colors.)

In this way, the student can later "upgrade" his repertoire. For example, for the opening roll:

.....P, 65R, S {43D, 21$}

This means the same as before, but with additional info, which is:
To upgrade the entire set to perfect play, add exceptions of 43D and 21$.

I haven't thought about the complexities of incorporating a "layer" model into second-roll rules. That's just a couple of random thoughts. I memorized best second roll plays eons ago (with only a little updating needed over the decades), but never got around to formalizing rules for others. (I hope to have time for it some day.) Kudos to Jeremy for doing so.

Hope that helps.

Nack

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