I'm looking for a wonderfully useful adjective I've come across several times but have since forgotten.
It was used in the context of solving a difficult problem (think puzzle, math, or science) and describes the likely first approach / solution that a reasonable person with some domain knowledge would consider.
In the context of computer science, for example:
The ______ approach to this pathfinding problem is to use a modified depth-first search algorithm.
Maybe not obvious to an outsider, but would likely be one of the first candidate strategies to come to mind for someone with some computer science training.
The word has a neutral connotation, unlike naive or brute-force, which are commonly used in similar sentences. That is to say, this word makes no claims about whether this approach / solution is ultimately correct.
Again, think "reasonable", "first approach you're likely to think of among several possible approaches"
A word I've considered is "canonical approach" - but I'm not convinced. Unsurprisingly thesaurus.com has been of little help :) I've tried searching through synonyms for canonical, reasonable, straightforward, naive, obvious, standard, conventional but haven't found it yet.