The Train and the Fly
The brief
- Fill the grid with digits, and draw a train that moves orthogonally through the grid and visits every cell once.
- The train consists of 4 carriages of equal length.
- A carriage doesn't touch itself, not even diagonally.
- Adjacent digits along a carriage are consecutive.
- An X connects the end cells of two carriages, which sum to 10.
- The black fly connects two digits with a 1:2 ratio.
- Identical digits may not touch each other orthogonally.
- A digit on the train indicates how many times that digit appears on the train.