chesspresso.position
Class Position

java.lang.Object
  |
  +--chesspresso.position.AbstractPosition
        |
        +--chesspresso.position.AbstractMutablePosition
              |
              +--chesspresso.position.AbstractMoveablePosition
                    |
                    +--chesspresso.position.Position

All Implemented Interfaces:

ImmutablePosition, MoveablePosition, MutablePosition

public final class Position

extends AbstractMoveablePosition

Field Summary

static int	E
static int	N
static int	NE
static int	NO_DIR
static int	NUM_OF_DIRS
static int	NW
static int	S
static int	SE
static int	SW
static int	W

Fields inherited from class chesspresso.position.AbstractMutablePosition

m_changeListeners, m_listeners, m_notifyListeners, m_notifyPositionChanged

Fields inherited from class chesspresso.position.AbstractPosition

HASH_ALL_MASK, HASH_TOPLAY_MASK, HASH_TOPLAY_MULT, s_hashCastleMod, s_hashEPMod, s_hashMod

Fields inherited from interface chesspresso.position.ImmutablePosition

ALL_CASTLES, BLACK_CASTLE, BLACK_LONG_CASTLE, BLACK_SHORT_CASTLE, NO_CASTLES, WHITE_CASTLE, WHITE_LONG_CASTLE, WHITE_SHORT_CASTLE

Constructor Summary

Position()

Position(ImmutablePosition pos)

Position(int bufferLength)

Position(java.lang.String fen)

Position(java.lang.String fen, boolean strict)

Method Summary

boolean	canMove()
boolean	canRedoMove()
boolean	canUndoMove()
void	clear()
static Position	createInitialPosition()
void	doMove(short move)
short[]	getAllCapturingMoves()
short[]	getAllMoves()
short[]	getAllNonCapturingMoves()
short[]	getAllReCapturingMoves(short lastMove)
int	getCastles() Return the still allowed castles as mask.
int	getColor(int sqi)
double	getDomination()
static long	getFirstSqiBB(long bb)
int	getHalfMoveClock() Return the number of moves since the last capture and the last pawn move.
long	getHashCode() Returns a 64bit hash code of the current position. 64bit should be enough to disnstinguish positions with almost no collisions.
Move	getLastMove()
short	getLastShortMove()
int	getMaterial()
java.lang.String	getMovesAsString(short[] moves, boolean validateEachMove)
short	getPawnMove(int colFrom, int to, int promoPiece)
int	getPiece(int sqi)
short	getPieceMove(int piece, int colFrom, int rowFrom, int to)
int	getPlyNumber() Return the current ply number.
int	getSqiEP() Return the current en passant square.
int	getStone(int sqi) Return the stone currently on the given square.
int	getToPlay() Return the player whose turn it is.
boolean	isCheck()
boolean	isLegal() Return whether the current position is legal.
boolean	isMate()
boolean	isSquareEmpty(int sqi)
boolean	isStaleMate()
boolean	isTerminal()
static long	ofCol(int col)
static long	ofRow(int row)
static long	ofSquare(int sqi)
static void	printProfile()
boolean	redoMove()
void	setCastles(int castles)
void	setHalfMoveClock(int halfMoveClock)
void	setPlyNumber(int plyNumber)
void	setSqiEP(int sqiEP)
void	setStone(int sqi, int stone)
void	setToPlay(int toPlay)
void	takeBaseline()
void	toggleToPlay()
boolean	undoMove()
void	validate() Validates the internal state.

Methods inherited from class chesspresso.position.AbstractMoveablePosition

doMove, getMove

Methods inherited from class chesspresso.position.AbstractMutablePosition

addPositionChangeListener, addPositionListener, excludeCastles, fireCastlesChanged, fireHalfMoveClockChanged, fireMoveDone, fireMoveUndone, firePlyNumberChanged, firePositionChanged, fireSqiEPChanged, fireSquareChanged, fireToPlayChanged, incHalfMoveClock, includeCastles, inverse, removePositionChangeListener, removePositionListener, resetHalfMoveClock, set, setNotifyListeners, setStart

Methods inherited from class chesspresso.position.AbstractPosition

equals, getFEN, getStartPositionHashCode, hashCode, isCastlePossible, isSquarePossibleEPSquare, isStartPosition, isWhiteToPlay, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface chesspresso.position.MutablePosition

set, setStart

Methods inherited from interface chesspresso.position.ImmutablePosition

getFEN, hashCode, isStartPosition

Field Detail

NO_DIR

public static final int NO_DIR

See Also:

Constant Field Values

NUM_OF_DIRS

public static final int NUM_OF_DIRS

See Also:

Constant Field Values

SW

public static final int SW

See Also:

Constant Field Values

S

public static final int S

See Also:

Constant Field Values

SE

public static final int SE

See Also:

Constant Field Values

E

public static final int E

See Also:

Constant Field Values

NE

public static final int NE

See Also:

Constant Field Values

N

public static final int N

See Also:

Constant Field Values

NW

public static final int NW

See Also:

Constant Field Values

W

public static final int W

See Also:

Constant Field Values

Constructor Detail

Position

public Position()

Position

public Position(int bufferLength)

Position

public Position(ImmutablePosition pos)

Position

public Position(java.lang.String fen)
         throws java.lang.IllegalArgumentException

Position

public Position(java.lang.String fen,
                boolean strict)
         throws java.lang.IllegalArgumentException

Method Detail

printProfile

public static void printProfile()

ofSquare

public static final long ofSquare(int sqi)

ofCol

public static final long ofCol(int col)

ofRow

public static final long ofRow(int row)

getFirstSqiBB

public static final long getFirstSqiBB(long bb)

createInitialPosition

public static Position createInitialPosition()

clear

public void clear()

Specified by:

clear in interface MutablePosition

Overrides:

clear in class AbstractMutablePosition

getToPlay

public final int getToPlay()

Description copied from interface: ImmutablePosition

Return the player whose turn it is.

Returns:

the player whose turn it is

isSquareEmpty

public final boolean isSquareEmpty(int sqi)

Overrides:

isSquareEmpty in class AbstractMutablePosition

getCastles

public final int getCastles()

Description copied from interface: ImmutablePosition

Return the still allowed castles as mask.

Returns:

the still allowed castles as mask.

getSqiEP

public final int getSqiEP()

Description copied from interface: ImmutablePosition

Return the current en passant square.

Returns:

the current en passant square, NO_SQUARE if none

getHalfMoveClock

public final int getHalfMoveClock()

Description copied from interface: ImmutablePosition

Return the number of moves since the last capture and the last pawn move. This number is used for the 50-move rule.

Returns:

the number of moves since the last capture and the last pawn move

getPlyNumber

public final int getPlyNumber()

Description copied from interface: ImmutablePosition

Return the current ply number.

Returns:

the current ply number, starting at play no. 0

getHashCode

public final long getHashCode()

Description copied from interface: ImmutablePosition

Returns a 64bit hash code of the current position. 64bit should be enough to disnstinguish positions with almost no collisions. TODO: add reference to paper

Specified by:

getHashCode in interface ImmutablePosition

Overrides:

getHashCode in class AbstractPosition

Returns:

a 64bit hash code

getStone

public final int getStone(int sqi)

Description copied from interface: ImmutablePosition

Return the stone currently on the given square.

Parameters:

sqi - the square

Returns:

the stone of the given square

getPiece

public final int getPiece(int sqi)

Overrides:

getPiece in class AbstractMutablePosition

getColor

public final int getColor(int sqi)

Overrides:

getColor in class AbstractMutablePosition

setStone

public final void setStone(int sqi,
                           int stone)

setPlyNumber

public final void setPlyNumber(int plyNumber)

setHalfMoveClock

public void setHalfMoveClock(int halfMoveClock)

setCastles

public final void setCastles(int castles)

setSqiEP

public void setSqiEP(int sqiEP)

setToPlay

public final void setToPlay(int toPlay)

toggleToPlay

public final void toggleToPlay()

Overrides:

toggleToPlay in class AbstractMutablePosition

takeBaseline

public void takeBaseline()

doMove

public void doMove(short move)
            throws IllegalMoveException

IllegalMoveException

canUndoMove

public boolean canUndoMove()

undoMove

public boolean undoMove()

canRedoMove

public boolean canRedoMove()

redoMove

public boolean redoMove()

isLegal

public boolean isLegal()

Description copied from interface: ImmutablePosition

Return whether the current position is legal.

Specified by:

isLegal in interface ImmutablePosition

Overrides:

isLegal in class AbstractPosition

Returns:

whether the current position is legal

validate

public void validate()
              throws IllegalPositionException

Description copied from interface: ImmutablePosition

Validates the internal state. Used for debugging and testing.

Specified by:

validate in interface ImmutablePosition

Overrides:

validate in class AbstractPosition

Throws:

IllegalPositionException - if the internal state is illegal

isCheck

public final boolean isCheck()

isTerminal

public boolean isTerminal()

isMate

public boolean isMate()

isStaleMate

public boolean isStaleMate()

getLastShortMove

public short getLastShortMove()

getLastMove

public Move getLastMove()

getPawnMove

public short getPawnMove(int colFrom,
                         int to,
                         int promoPiece)

getPieceMove

public short getPieceMove(int piece,
                          int colFrom,
                          int rowFrom,
                          int to)

getAllMoves

public short[] getAllMoves()

getAllReCapturingMoves

public short[] getAllReCapturingMoves(short lastMove)

getAllCapturingMoves

public short[] getAllCapturingMoves()

getAllNonCapturingMoves

public short[] getAllNonCapturingMoves()

canMove

public boolean canMove()

getMovesAsString

public java.lang.String getMovesAsString(short[] moves,
                                         boolean validateEachMove)

getMaterial

public int getMaterial()

getDomination

public double getDomination()