Okay, premise: card games are small-scale economies driven by the consistent input of random values and the idea that certain of these values are worth more than face in specific contexts (eg as a sum of 21, in a set of four, or in response to a Jack). I’m talking about trump (playing) card games, here, not CCGs.
Now, a question: are all board games essentially set dressing on top of a mildly complex graph with a simple economy, driven by consistent random inputs?
I imagine that Reiner Knizia would say yes, and with good reason. There’s certainly evidence for it–Risk, Ticket to Ride, Settlers of Catan, Sorry. Heck, Candyland. Monopoly and its thousand licensed knockoffs demonstrate the viability (economically, anyway) of separating setting from rules.
Then again, chess, checkers, Stratego and Terrace have no economy and no randomness. If we accept that my description of board games above is accurate some significant percentage of the time, these obviously need their own category–but is that because they’re nonrandom, or because they have no economy? (Or do we accept that description at all?)