I'm primarily an ASL player, but lack of opponents the last several years has me playing some solo. SASL is fun, and I have SASL projects going, but it gets a bit wearisome sometimes. So I like to play SK scenario solo sometimes. I find SK perfect for this since there in no concealment, dummies, or HIP (at least in the ETO, unless by SSR), which makes solo play a lot easier IMO. I would like to say the trimmed down rules set is also a bonus, but I've grown to dislike the ASLSK RB (mostly due to formatting - I find it a lot harder to find rules, since there is a dire lack of sub-section headings and rule titles (IMO).