Catan setup rules
One rule comes from the printed manual. The other three are house rules that groups add because a purely random board is often unfair to somebody.
A Catan board is legal the moment the pieces are on the table. It is not always fair. Four constraints decide how even the map plays, and the generator applies whichever ones you tick.
The four rules
| Rule | Default | Source |
|---|---|---|
| Keep 6 and 8 apart | On by default | The printed manual states it. |
| Keep 2 and 12 apart | Off by default | A house rule. |
| Keep matching numbers apart | On by default | A house rule. |
| Keep matching resources apart | Off by default | A house rule. |
Keep 6 and 8 apart · On by default
The 6 and the 8 pay five pips each, more than any other token. A corner that touches both decides the game in the first ten minutes. Keeping them off the same edge spreads the strongest hexes across the island.
Keep 2 and 12 apart · Off by default
This is the mirror of the first rule. The 2 and the 12 pay one pip each, so a corner that touches both is close to dead. Separating them means fewer corners nobody wants, which keeps more of the map worth playing.
Keep matching numbers apart · On by default
Two hexes with the same number on one corner pay twice on a single roll. That is swingy: the owner floods on a hit and starves in between. The rule spreads each number out so no roll is worth double to one player.
Keep matching resources apart · Off by default
A random draw often clumps four wool hexes into one corner of the island. This rule breaks the blocks up, so every part of the map offers a mix. It is the strictest rule of the four, and it changes the look of the board the most.
Why a random draw is not enough
Most generators shuffle the tiles and then check the result. That works while the rules are loose. It stops working when you ask for matching resources to stay apart: in a test of 100 attempts at 20,000 shuffles each, a plain shuffle satisfied that rule 18 times and gave up 82 times.
This generator places the pieces instead. It fills the hardest position first, and it steps back whenever a position runs out of pieces. Every rule combination then lands in well under a millisecond, including the strict one.
What to tick, and when
- New group: leave the defaults. The board matches the printed rule and avoids the worst clumps.
- Tournament feel: tick all four. The map comes out even and no corner runs away with the game.
- Chaos: untick everything. Red numbers may sit together, and one player may draw a very rich corner.
The rules sit on the printed slip beside the board. Open the generator and tick the set you want, or read what each number token pays in Catan dice odds.
Common questions
What is the official Catan setup rule?
The printed manual asks you to place the number tokens so that no 6 touches another 6 or an 8, and no 8 touches another 8 or a 6. That is the only placement constraint the rules state. Everything else is a house rule.
Can two red numbers be next to each other in Catan?
Not under the printed rule. The 6 and the 8 are the red numbers, and the manual keeps them off the same edge. Groups that want a wilder board sometimes drop the rule on purpose.
Should the desert be in the middle?
The beginner layout puts it in the middle, and the random setup does not. A central desert is convenient, because the robber starts far from the outer hexes. A random desert placement is the normal choice once a group knows the game.
Do the rules change for the 5–6 player expansion?
No. The same rules apply, just to more hexes. The larger map has more shared edges, so a strict rule set takes more work to satisfy.