Catan Rules

Catan is built around a single tension that runs through every turn: the dice decide which resources get produced across the whole board, but what you actually build with them is a running series of choices, trades, and blocks aimed at your opponents as much as your own board position.

The board and starting placement

The board is assembled from hexagonal terrain tiles — forest, hills, mountains, fields, pasture, and one desert — arranged randomly (or per a suggested layout) each game, with a numbered token placed on every tile except the desert. Players take turns placing two settlements each at the start of the game, each on a corner where up to three hex tiles meet, along with a connecting road out of each settlement; the second settlement placed, in reverse turn order, immediately produces starting resources from the hexes it touches.

Producing resources

On each turn, the active player rolls two dice, and every hex bearing that number produces one resource of its type for every settlement (one resource) or city (two resources) touching it, regardless of whose turn it is — this is the core of Catan's design: you're producing resources on other players' turns just as often as your own, which is why the numbers surrounding your settlements matter more than almost anything else in the game.

Building

Resources are spent to build: a road (lumber and brick), a settlement (lumber, brick, wool, and grain), a city upgrade from an existing settlement (ore and grain, and cities produce double), or a development card (ore, wool, and grain) drawn from a face-down deck that can grant knights, resource bonuses, or victory points. A settlement can only be built at a corner with no other settlement within two road segments of it, which is what forces the board's layout to spread players out rather than clustering.

Trading

Trading is a genuine negotiation, not a fixed exchange rate: players can propose any trade to any other player at the table during their own turn, and both sides have to agree for it to happen. A standard maritime trade — four of the same resource for one of any other, from the bank — is always available without negotiation, and building a settlement on a numbered harbor space improves that rate, sometimes down to 2-for-1 for a specific resource.

The robber

Rolling a 7 triggers the robber instead of producing resources: every player holding more than seven resource cards discards half of them, and the player who rolled moves the robber to any hex tile, which blocks that tile from producing at all until the robber moves again, and steals one random resource card from an opponent with a settlement or city touching that hex. The robber is the game's one deliberately disruptive mechanic — it's how a runaway leader's best-producing tile gets shut down by the rest of the table.

Winning: the ten victory points

The game ends the instant a player reaches 10 victory points on their own turn. Points come from settlements (1 each), cities (2 each), the longest continuous road of at least five segments (2 points, and it can be taken away if another player builds a longer one), the largest army of at least three played knight development cards (2 points, same take-away rule), and certain development cards that grant a hidden victory point directly.

Origins: a 1995 German design that reshaped the hobby

Catan was designed by Klaus Teuber and first published in Germany in 1995 as Die Siedler von Catan (Settlers of Catan), and it's widely credited with helping popularize modern "Eurogame" board design — resource management and trading over direct combat — to a mainstream audience far beyond the hobby board-game scene that existed before it. It's a commercial, trademarked game still actively published and updated with official expansions, which is why the rules above cover the core game rather than any of those later additions.

The arguments this game actually produces

Trades cause more table friction than anything else in Catan — specifically whether a proposed trade, once verbally agreed by both players, can be retracted before the cards actually change hands — most tables treat a trade as binding the moment both sides say yes, precisely to stop last-second changes of mind once a player sees how a trade affects the wider board. The second is exactly which resource card gets stolen when the robber targets a player with several types in hand — it's drawn at random, face-down, by the robbing player, never chosen deliberately from a revealed hand.

Questions that come up mid-game

Can a road be built without a settlement or city at either end of it? Yes, as long as the new road connects to a road, settlement, or city a player already has on the board — roads extend a player's existing network rather than needing to start fresh from a building each time.

Is a player required to discard resources when the robber is rolled if they have exactly seven cards? No — the discard only applies to players holding more than seven; exactly seven is safe, which is why managing your hand size down to seven or fewer before a likely 7 roll is a real, common defensive habit.