No attempt was made to construct representative instances of the possible situations.

Let´s try then, with the aid of exact 6dks EoR´s (checksum = -2.46109 e -13) plus combinatorial analysis, I get the following results:

S (17) doubling A, A vs 6

Removing a, a, 6.

Db if TC > - 0.355349

removing a, a, a, 6

Db if TC > - 0.837136

H (17) doubling A, A vs 6

Removing a, a, 6

Db if TC > -1. 32251

removing a, a, a, 6

Db if TC > -1,73297

That every derived index has a certain element of faith in its generation, no matter if it is with Monte Carlo simulated runs, and/ or with the aid of exact combinatorial, is still a valid assumption, that Griffin foresaw, almost now, 43 years ago. Here the discrepancies between your figures and mine, and specially for the h17 ones, speak for themselves. A matter of faith, then? I will agree for close decisions mainly, but not for this case of doubling with the H17 rule in effect. The full -deck favorability for carry on the action, namely, to double down equals:

m (6) = 0,971026

And thus, your h17 index can´t be equal to zero, no matter how naturally it has occurred in your sims. It must be lower, then. Think about it, Gronbog. An “Old-Timer” advice, btw.

Zenfighter