Hmm.. thats kind of intressting.
there are then like 4 Golddigging tiles.
Once these are placed then a carcassonne version of saboteur starts.
these are 4,5 x 4,5 and contain only paths and blockages.
The player who placed the tile then appoints his co-workers and his opponents.
the player then needs to make a straight path from the ladder to the gold.