Surrender versus hit/stand indices...

I am learning the I-18 and the fab-4 index values (for h17 games since they are most common in my area) and have a few questions:

Why does I-18 say I should stand on 16 v. 10 if TC=0, while basic strategy for 16 v. 10 says I should surrender (or hit if surrender is not available)?

Why does 15 v. 10 say to surrender at TC=0, but 15 v. 10 also says to stand at TC=4. What should I do, for example, if TC=5 and surrender IS available? Should I surrender, or should I stand on this hand?

Is there a hierarchy for the index values? i.e. do the surrender indices supercede the hit/stand indices (thereby ignoring the hit/stand indices if surrender is available)?

Thanks in advance for your response.

Theo

When u hit/stand then u have no surrending oppertunities.
First thing u should use Surrender(if u have it).
Surrending is very powerful weapen for playing high counts.
for TC 7 and more u can surrender all crap 12-17 vs dealer 10
TC 5 and more 13-17 against 10.Also it keeps variation down.

>for TC 7 and more u can surrender all crap 12-17 vs dealer 10
False.

>TC 5 and more 13-17 against 10.
False.

For 12 vs. T, surrender at TC >= +13
For 13 vs. T, surrender at TC >= +7
For 14 vs. T, surrender at TC >= 4
For 15 vs. T, surrender at TC >= 0
For 16 vs. T, surrender at TC >= -2
For 17 vs. T, surrender at TC >= +11

Also, the indices are useful, even with surrender. For example, if you are dealt 8-4 vs. T in TC = +1, and you hit and get a 4, you now have 8-4-4 vs T. Stand, since TC > 0.

In the question it wasn't quite clear what type of surrender was meant, early or late. The ones you gave were for late surrender where the possibility of a dealer blackjack is already excluded.Privador's figures were the ones for early surrender and they were correct. I would add the one for 13v10 which is +3.

Francis Salmon