London Transport, Chess Puzzle

Well, they say nothing was working in London this morning. No Central Line, no Circle Line. Delays on the Northern and Picadilly. Strikes on the buses. The night's engineering work on the train tracks not finished on time. Silent thousands fuming on the platforms. Glad I slept right through my alarm and missed it all, frankly.

I don't know anything about this puzzle, except it's called "Scenic Railway." If only London worked so prettily too.