> i have another question. I play in a casino, where
> splitting tens and then receiving an ace is a BJ.
> What is the house edge(6 decks)about, what is the
> additional edge for a CC?

For the BS player, this rule doesn't give enough extra edge to warrant splitting tens against any dealer upcard. So, for BS alone, you wouldn't split.

> I think splitting them against a 5 and 6 is OK, but
> what about 7, 8 or 9?
> What about against 2,3 and 4 ?

As you probably know, the Hi-Lo multi-deck indices for splitting tens vs. dealer's upcards of 2-8, respectively, are: 11, 8, 6, 5, 4, 13, 20. Now, if it is not correct BS to split, even against 5 and 6 (and it isn't!), then we can safely assume that the rule doesn't lower the indices by as much as, say, 4. That being the case, I would guess that, as a card counter, you could split vs. 4-6 with moderate plus counts but that it wouldn't be correct to split vs. any other upcards, except maybe 3, with TC = +5 or so.

It certainly would not be right to split vs. 7, 8, or 9.

Don