An anonymous reader writes: Dave Munson was thinking about moving, and had a couple broad requirements for a new home: it must be affordable, and its neighborhood must be walkable. Price is easy to chart, but how do you compare the walkability of hundreds of cities? Simple: use math. A website called Walk Score provides rough walkability ratings, but doesn't tell you much about affordability. Munson downloaded the data that went into a city's Walk Score, weighted the relevant variables, and mapped the top results. Then he looked for overlap with the map of areas in his price range. He says, "Capitol Hill, Seattle led the pack. To be honest, I was expecting something a smaller, affordable Midwest town or something, but it the highest scoring areas were usually just outside of major downtowns. Other top areas included Cambridge and Somerville outside of Boston, and the South End in Boston; Columbia Heights, Washington, DC; The Mission District, Lower Haight, and Russian Hill, San Francisco; Midtown, Atlanta; Greenwood, Dyker Heights, Kensington, and Sheepshead Bay, Brooklyn; Graduate Hospital in Philadelphia, where we used to live; Lake View, Chicago; and Five Points, Denver."