I think this question has been asked before but I couldn't find it in a quick search...

6d S17 das ls

88 vs 9, 10, A. Split or surrender?

Also, this situation arises very rarely, but 15 vs. 7 or similar hand, my surrender index is less than my stand index (17 vs. 22). What if the TC is >22, do I stand or surrender?

Thanks