Catan Board Generator

Constraints

Checked = allowed · Unchecked = forbidden

6 & 8 can be adjacent High-value tiles can touch
2 & 12 can be adjacent Rare tiles can touch
Same numbers can be adjacent Duplicate numbers can touch
Same resources can be adjacent Matching tiles can touch

Legend

Grain (×4)
Lumber (×4)
Wool (×4)
Ore (×3)
Brick (×3)
Desert (×1)

Ports: 3:1 = any 3 resources · 2:1 = specific resource