I always thought it was a silly analogy. Football is more like chess, because you have multiple specialized pieces working on long, centrally planned, scripted attacks and defenses in a discrete series of plays. BJJ and grappling are rarely performed on a forethought/conscious thought level, because working through multiple potential computations and permutations is simply a bit too slow of a process. If you aren't functioning predominantly on muscle memory and honed instinct by the time you hit the competition mats, you probably aren't going to do very well. Moreover, there is no turn-by-turn aspect. Basically, grappling has almost nothing in common with chess, except for the fact that both take practice and skill, and both involve some form of general strategy.