More Constrained Tube Journeys
On the way back from New Eltham this evening, I started pondering some more constrained tube journeys:
- shortest journey with at least one non-interchange (no circle on the tube map) station on each line (Waterloo & City exempted) starting and ending at an interchange (stations on two lines only count for one line at a time).
- the longest journey only using interchange stations (black/white circle but only tube lines and with different lines than its neighbours—Farringdon doesn’t count, for example.)
For the first one, I can do it in 30 stations (solution later). For the second, the best I’ve got so far is 11.
[11:11, 8th November. 19 stations for the second one.]