One might wonder how Elliot knows that Susan isn't interested in playing Chess. The answer is simple: They've watched a lot of Star Trek together. The subject has come up.
When this comic was originally posted, it came with a "Mon-Wed-Friday story comic schedule next week" notice. At this point in time, my sleep schedule was really badly thrown off and I needed a bit of a break to get it back on track.
Of course, in spite of using past tense, I'm writing this comic commentary before the week has even happened, so... Yeah. Hopefully the fourth commentary from now won't include a paragraph with me ranting about how the plan went horribly wrong.