As Paul Weaver is wont to mention, Nack Ballard is best nactator living today. Nack would win any Nactation contest hands down. The obvious having been stated, let me take a crack at this.
Beyond the standard opening moves, 21S 41S 51S etc, there is no absolute preference one way or the other. I believe Nack typically uses the S (Split) family whenever possible in describing a play in isolation. So, if he were nactating your position, and were not contrasting it with another, he would likely use S. The “Convenience Clause” clause allows this, because the S family is empty. On the other hand, if Nack were comparing your position to another, especially if the alternative had a non-empty S family, Nack might use the Z (Reverse split) family to nactate your play. Other players can use Z freely if that is their preference. It is never an error to use Z in your position. It is, however, an error to use Z for the standard opening moves.
In your second position, your sense to use Z is correct. When there are legitimate S-family plays, it is an error to use S as a substitute for Z. I hope this helps. Mike P.S. Thanks for posting rollouts of these 3rd-roll positions. I will be adding them to my small database. | ||||||||||||||||||||
