
If you build a settlement on his road, you disrupt it yes. See also: catan-longest-road-clarification. You can build on any place if:
What is the longest road in a settlement?
In Settlers, players get two victory points for having the "longest road". This is defined to be: The longest contiguous single path (measured in roads) from start point to end point, that is not broken up by an opponents settlement or city.
How do you get the longest road in Catan?
The Longest Road is a special card included in Catan and is worth 2 victory points. The first player to have 5 or more continuous road segments, from one point to another without doubling back, may claim this card. If a different player gains a longer continuous road, they may claim the card from the current holder.
How do I get the longest road card?
If a different player gains a longer continuous road, they may claim the card from the current holder. They must have a greater amount of segments than you. With this, it is possible to completely secure the Longest Road card by using all 15 of your road segments in a continuous manner.

Does a settlement break a road?
Yes, settlements do break up other player's roads. If the blue player has a road that is six segments long, and the red player builds a settlement between two of the blue roads, than we say that the blue player's road is "broken".
Can you interrupt a road with a settlement Catan?
Yes, if you add the new road piece to one of your own roads. The blue player may build the road piece marked with "*", even though his continuous road is interrupted by the red settlement.
How many roads can be built in the settlement at most?
You cannot build more pieces than what is available in your pool—a maximum of 5 settlements, 4 cities, and 15 roads. A new road must always connect to 1 of your existing roads, settlements, or cities. Only 1 road can be built on any given path4.
Can you break longest road?
A longest road can be broken if a settlement is legally built within the road.
Can you build a road around a settlement?
No. If you build a new road, it must always connect to one of your own roads, settlements, or cities. In the situation depicted above, the blue player would not be connecting his road piece to his own road but to the red player's settlement, which the rule prohibits.
Can longest road have settlements?
The settlement blocks your road if it appears at the end of your road, that is if one of your roads comes off it. If it is in the middle of your road, so that there are two of your roads coming off it, you can keep building at both ends, but the settlement splits the road in two when counting for longest road.
Can I put a settlement between two roads?
Perfectly valid play. Even more, you can play a settlement between two of another player's roads (as long as you respect the distance rule and you also have a road leading to that intersection).
How does longest road work in Catan?
The Longest Road is a special card included in Catan and is worth 2 victory points. The first player to have 5 or more continuous road segments, from one point to another without doubling back, may claim this card. If a different player gains a longer continuous road, they may claim the card from the current holder.
Can you block a road with a settlement?
Show activity on this post. If you build a settlement on his road, you disrupt it yes.
What counts as a continuous road in Catan?
The Longest Road is a continuous road connecting two intersections, which consists of at least five individual road pieces and is not interrupted by game pieces belonging to other players. It has more individual road pieces than any other connecting road of this type.
Output
All players that have a road of the longest length (it could be more than one if there are ties), followed by a whitespace and/or underscore delimited count in base 10 of how long that road is.
The Problem statement
You may write a program or function, receives the input board via STDIN or as a string argument to your function, which returns the output described above as a string or prints it to STDOUT (or closest alternative). You may optionally include a single trailing newline in the output.
How many segments are there in the longest road card?
With this, it is possible to completely secure the Longest Road card by using all 15 of your road segments in a continuous manner. since there are only 15 segments per player, no one can have a longer road than you.
What is the longest road in Catan?
Longest Road. The Longest Road is a special card included in Catan and is worth 2 victory points. The first player to have 5 or more continuous road segments, from one point to another without doubling back, may claim this card. If a different player gains a longer continuous road, they may claim the card from the current holder.
