There have always been a few indices that confused me... does that number mean double at/above and stand below, or is it hit below?
Anyway, in an attempt to straighten it out for myself I made up a chart for the typical Downtown 1D game, based on generic basic strategy plus I18 for Hi-Lo, plus a few extras from Professional Blackjack. I've split up the table a bit more than is usually done.
I tried to post the chart as plain text, but it's impossible to read so I made it a link instead.
The boxed numbers are the I18 plays, highlighted just because they're most important.
The upshot... any wisdom on whether there are any errors here?