Package search.ab

Class Evaluation

java.lang.Object

search.ab.Evaluation

public class Evaluation
extends Object

Provides methods for evaluating game positions.

Field Summary

Fields

Modifier and Type	Field	Description
static double	closenessWeight
static double	closenessWeightTotal
static double	doubleWeight
static double	mixedWeight
static double	possibleMovesWeight
static double	protectedPiecesWeight

Constructor Summary

Constructors

Constructor	Description
Evaluation()

Method Summary

Modifier and Type	Method	Description
static LinkedList<Integer>	convertMovesToList(LinkedHashMap<Integer,List<Integer>> moves)	Converts a map of moves to a list for easier manipulation.
static LinkedHashMap<Integer,List<Integer>>	convertMovesToMap(List<Integer> movesList)	Converts a list of moves (as combined integers) back to a map representation.
static double	getScore(Piece piece, double score, double weight)	Computes the score (contribution) of a piece based on its type and weight.
static double	getScoreWrapper(MoveGenerator moveGenerator, Color player, double depth)	Computes the score of the current game position for a specified player.
static double	getScoreWrapperAI(MoveGenerator moveGenerator, Color player, double depth, LinkedHashMap<Integer,List<Integer>> moves)	Computes the score of the current game position for a player considering opponent's moves.
static double	getScoreWrapperOld(MoveGenerator moveGenerator, Color player, String fen)	Computes the score of the current game position for a specified player in an old version for benchmarking.
static void	orderMoves(LinkedList<Integer> moves, Color color, MoveGenerator game)	Orders moves in a list based on whether a move winning, capturing, and closeness to target row.
static void	orderMovesOld(LinkedList<Integer> moves, Color color)	Orders moves in a list in an old version for benchmarking based on whether a move winning and closeness to target row.
double	rateMove(MoveGenerator gameState, Color color, int startPosition, int endPosition, int depth)	Rates a move in the game based on its impact on the game position for a specified player.
static double	ratePosition(MoveGenerator moveGenerator, Color color, int depth)	Rates the overall position of the game for a specified player.
static double	ratePositionAI(MoveGenerator moveGenerator, Color color, int depth, LinkedHashMap<Integer,List<Integer>> moves, Color currentColor)	Rates the overall position of the game for a player considering opponent's moves.
static double	ratePositionOld(MoveGenerator moveGenerator, Color color, String fen)	Rates the overall position of the game for a specified player in an old version for benchmarking.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

possibleMovesWeight

public static double possibleMovesWeight

protectedPiecesWeight

public static double protectedPiecesWeight

doubleWeight

public static double doubleWeight

mixedWeight

public static double mixedWeight

closenessWeight

public static double closenessWeight

closenessWeightTotal

public static double closenessWeightTotal

Constructor Details

Evaluation

public Evaluation()

Method Details

getScore

public static double getScore(Piece piece,
 double score,
 double weight)

Computes the score (contribution) of a piece based on its type and weight.

Parameters:

piece - The type of piece (SINGLE, DOUBLE, or MIXED).

score - The current score to be updated.

weight - The weight multiplier for the piece type.

Returns:

The updated score after adding the piece's contribution.

getScoreWrapper

public static double getScoreWrapper(MoveGenerator moveGenerator,
 Color player,
 double depth)

Computes the score of the current game position for a specified player.

Parameters:

moveGenerator - The MoveGenerator object providing game state information.

player - The color of the player for whom the score is computed (BLUE or RED).

depth - The current depth of evaluation in the search tree.

Returns:

The computed score for the player in the current position.

getScoreWrapperAI

public static double getScoreWrapperAI(MoveGenerator moveGenerator,
 Color player,
 double depth,
 LinkedHashMap<Integer,List<Integer>> moves)

Computes the score of the current game position for a player considering opponent's moves. Optimised for AI search

Parameters:

moveGenerator - The MoveGenerator object providing game state information.

player - The color of the player for whom the score is computed (BLUE or RED).

depth - The current depth of evaluation in the search tree.

moves - The opponent's moves represented as a map of combined integer start and end positions.

Returns:

The computed score for the player in the current position.

ratePosition

public static double ratePosition(MoveGenerator moveGenerator,
 Color color,
 int depth)

Rates the overall position of the game for a specified player.

Parameters:

moveGenerator - The MoveGenerator object providing game state information.

color - The color of the player for whom the position is rated (BLUE or RED).

depth - The current depth of evaluation in the search tree.

Returns:

The rating of the current position for the specified player.

ratePositionAI

public static double ratePositionAI(MoveGenerator moveGenerator,
 Color color,
 int depth,
 LinkedHashMap<Integer,List<Integer>> moves,
 Color currentColor)

Rates the overall position of the game for a player considering opponent's moves. Optimised for AI search

Parameters:

moveGenerator - The MoveGenerator object providing game state information.

color - The color of the player for whom the position is rated (BLUE or RED).

depth - The current depth of evaluation in the search tree.

moves - The opponent's moves represented as a map of combined integer start and end positions.

currentColor - The current color of the AI player.

Returns:

The rating of the current position for the specified player.

getScoreWrapperOld

public static double getScoreWrapperOld(MoveGenerator moveGenerator,
 Color player,
 String fen)

Computes the score of the current game position for a specified player in an old version for benchmarking.

Parameters:

moveGenerator - The MoveGenerator object providing game state information.

player - The color of the player for whom the score is computed (BLUE or RED).

fen - The FEN representation of the current board position.

Returns:

The computed score for the player in the current position.

ratePositionOld

public static double ratePositionOld(MoveGenerator moveGenerator,
 Color color,
 String fen)

Rates the overall position of the game for a specified player in an old version for benchmarking.

Parameters:

moveGenerator - The MoveGenerator object providing game state information.

color - The color of the player for whom the position is rated (BLUE or RED).

fen - The FEN representation of the current board position.

Returns:

The rating of the current position for the specified player.

rateMove

public double rateMove(MoveGenerator gameState,
 Color color,
 int startPosition,
 int endPosition,
 int depth)

Rates a move in the game based on its impact on the game position for a specified player.

Parameters:

gameState - The current MoveGenerator object representing the game state.

color - The color of the player making the move (BLUE or RED).

startPosition - The combined integer starting position of the move.

endPosition - The combined integer ending position of the move.

depth - The current depth of evaluation in the search tree.

Returns:

The computed score change due to the move.

convertMovesToList

public static LinkedList<Integer> convertMovesToList(LinkedHashMap<Integer,List<Integer>> moves)

Converts a map of moves to a list for easier manipulation.

Parameters:

moves - A map representing moves as combined integer start positions mapped to lists of end positions.

Returns:

A map of moves where each move is represented as a combined integer.

convertMovesToMap

public static LinkedHashMap<Integer,List<Integer>> convertMovesToMap(List<Integer> movesList)

Converts a list of moves (as combined integers) back to a map representation.

Parameters:

movesList - A list of moves where each move is represented as a combined integer.

Returns:

A map representing moves as combined integer start positions mapped to lists of end positions.

orderMoves

public static void orderMoves(LinkedList<Integer> moves,
 Color color,
 MoveGenerator game)

Orders moves in a list based on whether a move winning, capturing, and closeness to target row.

Parameters:

moves - A list of moves where each move is represented as a combined integer.

color - The color of the player for whom moves are being ordered (BLUE or RED).

game - The MoveGenerator object providing game state information.

orderMovesOld

public static void orderMovesOld(LinkedList<Integer> moves,
 Color color)

Orders moves in a list in an old version for benchmarking based on whether a move winning and closeness to target row.

Parameters:

moves - A list of moves where each move is represented as a combined integer.

color - The color of the player for whom moves are being ordered (BLUE or RED).