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Euler's solution involved a creative act of seeing-as, abstracting landmasses as nodes and bridges as lines. But once he'd done that, 18th-century Königsberg maps pretty cleanly onto the problem.pic.twitter.com/A8m3FhyNJo
Modern Bristol however is a mess. It's roughly two islands in a river, like Königsberg, but there's also two little islets off the west island, and a tributary branching off the river. Also there are a LOT of bridges:pic.twitter.com/nKavotTKPW
More importantly, there are a bunch of decisions to be made about what counts as a bridge. This is purpose-dependent: rail- and car-only bridges don't count in this solution because the whole point is to be able to walk it.
Then you have to decide whether bridges like these are two bridges or one bridge. (In this case they all get counted as two.)pic.twitter.com/JudF3BRAvd
Finally you have to decide how big the bridges have to be to count. The two bottom bridges off the islet count in this image. The top ones are little lock gates and are excluded.pic.twitter.com/1dgATEzXeW
Anyway after spending way too much time on this I think I actually have to walk it some time. Though a new bridge is being built, so the route might completely change by the time I get to it!
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