Show HN: A game that tests how well you know your local area(backofyourhand.com)

      ALDWYCH
      CATHERINE ST
      RUSSELL STREET
      DRURY LANE
      HIGH HOLBORN
      PRINCES CIRCUS
      ST GILES HIGH STREET
      EARNSHAW STREET
      NEW OXFORD STREET
      OXFORD STREET
      GT PORTLAND STREET
      MARGARET STREET
      CAVENDISH SQUARE
      HENRIETTA PLACE
      MARYLEBONE LANE
      WIGMORE STREET
      DUKE STREET
      MANCHESTER SQUARE
      MANCHESTER STREET
      GEORGE STREET
      EDGWARE ROAD
      HARROW ROAD 
      HARROW ROAD ROUNDABOUT
      BISHOP'S BRIDGE

  main streets / squares, maybe some (renowned - although that might take some additional Wikipedia/Wikidata data sources :-))
  landmarks if those can easily enough be extracted from OSM data

  easter egg mode for s/Paris/your favourite City with underground transportation/: find a specific metro station :-) (any entrance would count)

  "tourist" + smaller streets + any street really close to the circle center (15 minutes by foot / 5 minutes by car
  -- oh, you'll just have to add flooding algorithm :-) ^^) 

  "resident" + smaller streets everywhere but with greater probability closer to the circle center + footpaths
  (although with them probably lacking proper names most of the time that could be hard - but you could include
  e.g. streets from pedestrian zones)

  everything ^^

  if you pin a street that is more or less orthogonal to the target street
  (say their mean directions intersect at more than 45 degrees ; and the pin is sufficiently
  far away (30m / 10% of map height / half a block?) from their intersection (if any exists)
  to rule out precision errors) you get only 1/2 the points

  if you pin a street the wrong direction off a main street (and the target street
  does not cross the main street) you get only 2/3 the points
  (i.e. main streets intersecting the plane and you picked the wrong "half")

  "tourist":

  the same but for cities with rivers where you picked the wrong bank