Overview

Surround your Cities with Resources which either they prefer or are all different

Turn

Either play a City on a Cobblestone space or play a Resource on a non-patterned space

A newly placed piece does not have to be adjacent to anything particular

Game End

Continue until there is one space (a Resource space) remaining, which will house the finishing black/white special tile

Each of your cities will then score in one of 2 ways:

If all 4 adjacent spaces home a different resource, score 5 points

If not, score a point for each adjacent resource which matches the city's preferred resource (shown in its indent), score 0-4 points

The Black/White special end game tile is NOT a resource, and as such cannot be used for scoring (as such adjacent cities can ONLY score for preferred resource, as there would not be a 4th square for 4 different resources)