Data.NQueens.Internal

type Position = { col :: Int, row :: Int }

type Position { row :: Int, col :: Int }

newtype Board

newtype Board { size :: Int, queens :: List Position }

Constructors

• Board { queens :: List Position, size :: Int }

Instances

• Show Board

  Will display with leading and ending newline in the form below:

  _ Q _ _ _ _ _ Q Q _ _ _ _ _ Q _

isQueen :: Int -> Int -> List Position -> Boolean

Check if the Position has a queen.

canAttack :: Position -> Position -> Boolean

Check if the Position can be attacked.

valid :: Board -> Position -> Boolean

Check if the Position is valid by comparing against qs :: List Position.