BishBosh.Search.DynamicMoveData

AUTHOR

Dr. Alistair Ward

DESCRIPTION

Types

Type-synonyms

type Transformation x y positionHash = DynamicMoveData x y positionHash -> DynamicMoveData x y positionHash

The type of a function which transforms the dynamic move-data.

Data-types

data KillerMoveKey x y

• Killer-moves are indexed by both the move & the rank of the piece which made it.
• CAVEAT: there's still ambiguity in this key, since it may match either a different piece of the same rank or have a different move-type (though typically only quiet moves are recorded), in sibling games.

Instances

(Eq y, Eq x) => Eq (KillerMoveKey x y)

Methods

(==) :: KillerMoveKey x y -> KillerMoveKey x y -> Bool

(/=) :: KillerMoveKey x y -> KillerMoveKey x y -> Bool

(Ord y, Ord x) => Ord (KillerMoveKey x y)

Methods

compare :: KillerMoveKey x y -> KillerMoveKey x y -> Ordering

(<) :: KillerMoveKey x y -> KillerMoveKey x y -> Bool

(<=) :: KillerMoveKey x y -> KillerMoveKey x y -> Bool

(>) :: KillerMoveKey x y -> KillerMoveKey x y -> Bool

(>=) :: KillerMoveKey x y -> KillerMoveKey x y -> Bool

max :: KillerMoveKey x y -> KillerMoveKey x y -> KillerMoveKey x y

min :: KillerMoveKey x y -> KillerMoveKey x y -> KillerMoveKey x y

(Show y, Show x) => Show (KillerMoveKey x y)

Methods

showsPrec :: Int -> KillerMoveKey x y -> ShowS

show :: KillerMoveKey x y -> String

showList :: [KillerMoveKey x y] -> ShowS

data DynamicMoveData x y positionHash

The data on moves, gathered while searching.

Instances

Empty (DynamicMoveData x y positionHash)

Methods

empty :: DynamicMoveData x y positionHash

Functions

Constructors

mkKillerMoveKeyFromTurn :: Turn x y -> KillerMoveKey x y

Constructor.

Mutators

updateKillerMoves :: Transformation (KillerMoveKey x y) -> Transformation x y positionHash

Mutator.

updateTranspositions :: Transformation (Move x y) positionHash -> Transformation x y positionHash

Mutator.

euthanise

Arguments

:: NPlies

The number of plies currently applied to the game.

-> MaybeRetireAfterNMoves

The number of full moves after which killer-moves should be retired.

-> MaybeRetireAfterNMoves

The number of full moves after which transpositions should be retired.

-> Transformation x y positionHash

Remove archaic data.