One of each colour, ringed on your own board and nobody else's. Connect all five and the game is over.
2/4
Choose where to start
Your first turn is spent placing a marker, anywhere on the map. Everything you build has to reach back to it.
3/4
Lay two tracks a turn
Two single tracks, or one double across a river or through the mountains — a double costs both your points. You may build in two places at once, as long as both join your network.
4/4
The network is shared
The moment your track touches somebody else's, you may both build from the whole thing. Helping yourself often helps them.
Nobody to play against?
Every table can be filled with bots instead of people, at three strengths, and they
answer straight away rather than in three days. A game with a bot in it does not count
towards the ranking — that table compares players against players — but it
counts on your own page like any other game.