I don't quite understand what you're referring to. In this particular case, "boneuphtoner" made a comparison of different systems with that particular rule. Evidently, where he plays, RSA is allowed.
For the case where RSA is not allowed, there is a comparative analysis at the beginning of this thread (6D,S17,DOA,DAS,SPA1,SPL3,NS,4.5/6).
Let's consider that RSA means that aces can be split more than once (SPA2 or SPA3). Not being allowed to split aces (SPA0) would indeed be horrible.
In that case, the basic strategy would be to double down on AAv6 and hit in all other cases.
Let's see the effect on BS for the different options:
Code:
6D,S17,DOA,DAS,SPA1,SPL3,NS ==> BS-EV = -0.4022
6D,S17,DOA,DAS,SPA2,SPL3,NS ==> BS-EV = -0.3409
6D,S17,DOA,DAS,SPA3,SPL3,NS ==> BS-EV = -0.3326
6D,S17,DOA,DAS,SPA0,SPL3,NS ==> BS-EV = -0.5819
Sincerely,
Cac
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